Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/deoptimization.cpp @ 22720:48fde4d03767
Add assert for Unpack_uncommon_trap for ppc and always check for rethrow_exception
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Wed, 04 Nov 2015 16:11:58 +0100 |
parents | ba7846fcb814 |
children | 1dc87d090f96 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "code/debugInfoRec.hpp" | |
28 #include "code/nmethod.hpp" | |
29 #include "code/pcDesc.hpp" | |
30 #include "code/scopeDesc.hpp" | |
31 #include "interpreter/bytecode.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "memory/allocation.inline.hpp" | |
35 #include "memory/oopFactory.hpp" | |
36 #include "memory/resourceArea.hpp" | |
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37 #include "oops/method.hpp" |
1972 | 38 #include "oops/oop.inline.hpp" |
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39 #include "oops/fieldStreams.hpp" |
1972 | 40 #include "prims/jvmtiThreadState.hpp" |
41 #include "runtime/biasedLocking.hpp" | |
42 #include "runtime/compilationPolicy.hpp" | |
43 #include "runtime/deoptimization.hpp" | |
44 #include "runtime/interfaceSupport.hpp" | |
45 #include "runtime/sharedRuntime.hpp" | |
46 #include "runtime/signature.hpp" | |
47 #include "runtime/stubRoutines.hpp" | |
48 #include "runtime/thread.hpp" | |
49 #include "runtime/vframe.hpp" | |
50 #include "runtime/vframeArray.hpp" | |
51 #include "runtime/vframe_hp.hpp" | |
52 #include "utilities/events.hpp" | |
53 #include "utilities/xmlstream.hpp" | |
54 #ifdef TARGET_ARCH_x86 | |
55 # include "vmreg_x86.inline.hpp" | |
56 #endif | |
57 #ifdef TARGET_ARCH_sparc | |
58 # include "vmreg_sparc.inline.hpp" | |
59 #endif | |
60 #ifdef TARGET_ARCH_zero | |
61 # include "vmreg_zero.inline.hpp" | |
62 #endif | |
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63 #ifdef TARGET_ARCH_arm |
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64 # include "vmreg_arm.inline.hpp" |
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65 #endif |
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66 #ifdef TARGET_ARCH_ppc |
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67 # include "vmreg_ppc.inline.hpp" |
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68 #endif |
1972 | 69 #ifdef COMPILER2 |
70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
71 # include "adfiles/ad_x86_32.hpp" | |
72 #endif | |
73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
74 # include "adfiles/ad_x86_64.hpp" | |
75 #endif | |
76 #ifdef TARGET_ARCH_MODEL_sparc | |
77 # include "adfiles/ad_sparc.hpp" | |
78 #endif | |
79 #ifdef TARGET_ARCH_MODEL_zero | |
80 # include "adfiles/ad_zero.hpp" | |
81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
14391 | 85 #ifdef TARGET_ARCH_MODEL_ppc_32 |
86 # include "adfiles/ad_ppc_32.hpp" | |
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87 #endif |
14391 | 88 #ifdef TARGET_ARCH_MODEL_ppc_64 |
89 # include "adfiles/ad_ppc_64.hpp" | |
1972 | 90 #endif |
14391 | 91 #endif // COMPILER2 |
0 | 92 |
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93 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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94 |
22298 | 95 #if INCLUDE_JVMCI |
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96 #include "jvmci/jvmciRuntime.hpp" |
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97 #include "jvmci/jvmciJavaClasses.hpp" |
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98 #endif |
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99 |
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100 |
0 | 101 bool DeoptimizationMarker::_is_active = false; |
102 | |
103 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
104 int caller_adjustment, | |
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105 int caller_actual_parameters, |
0 | 106 int number_of_frames, |
107 intptr_t* frame_sizes, | |
108 address* frame_pcs, | |
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109 BasicType return_type, |
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110 int exec_mode) { |
0 | 111 _size_of_deoptimized_frame = size_of_deoptimized_frame; |
112 _caller_adjustment = caller_adjustment; | |
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113 _caller_actual_parameters = caller_actual_parameters; |
0 | 114 _number_of_frames = number_of_frames; |
115 _frame_sizes = frame_sizes; | |
116 _frame_pcs = frame_pcs; | |
6197 | 117 _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler); |
0 | 118 _return_type = return_type; |
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119 _initial_info = 0; |
0 | 120 // PD (x86 only) |
121 _counter_temp = 0; | |
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122 _unpack_kind = exec_mode; |
0 | 123 _sender_sp_temp = 0; |
124 | |
125 _total_frame_sizes = size_of_frames(); | |
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126 assert(exec_mode >= 0 && exec_mode < Unpack_LIMIT, "Unexpected exec_mode"); |
0 | 127 } |
128 | |
129 | |
130 Deoptimization::UnrollBlock::~UnrollBlock() { | |
6197 | 131 FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes, mtCompiler); |
132 FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs, mtCompiler); | |
133 FREE_C_HEAP_ARRAY(intptr_t, _register_block, mtCompiler); | |
0 | 134 } |
135 | |
136 | |
137 intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { | |
138 assert(register_number < RegisterMap::reg_count, "checking register number"); | |
139 return &_register_block[register_number * 2]; | |
140 } | |
141 | |
142 | |
143 | |
144 int Deoptimization::UnrollBlock::size_of_frames() const { | |
145 // Acount first for the adjustment of the initial frame | |
146 int result = _caller_adjustment; | |
147 for (int index = 0; index < number_of_frames(); index++) { | |
148 result += frame_sizes()[index]; | |
149 } | |
150 return result; | |
151 } | |
152 | |
153 | |
154 void Deoptimization::UnrollBlock::print() { | |
155 ttyLocker ttyl; | |
156 tty->print_cr("UnrollBlock"); | |
157 tty->print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); | |
158 tty->print( " frame_sizes: "); | |
159 for (int index = 0; index < number_of_frames(); index++) { | |
160 tty->print("%d ", frame_sizes()[index]); | |
161 } | |
162 tty->cr(); | |
163 } | |
164 | |
165 | |
166 // In order to make fetch_unroll_info work properly with escape | |
167 // analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and | |
168 // ResetNoHandleMark and HandleMark were removed from it. The actual reallocation | |
169 // of previously eliminated objects occurs in realloc_objects, which is | |
170 // called from the method fetch_unroll_info_helper below. | |
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171 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread, int exec_mode)) |
0 | 172 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, |
173 // but makes the entry a little slower. There is however a little dance we have to | |
174 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
175 | |
176 // fetch_unroll_info() is called at the beginning of the deoptimization | |
177 // handler. Note this fact before we start generating temporary frames | |
178 // that can confuse an asynchronous stack walker. This counter is | |
179 // decremented at the end of unpack_frames(). | |
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180 if (TraceDeoptimization) { |
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181 tty->print_cr("Deoptimizing thread " INTPTR_FORMAT, thread); |
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182 } |
0 | 183 thread->inc_in_deopt_handler(); |
184 | |
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185 return fetch_unroll_info_helper(thread, exec_mode); |
0 | 186 JRT_END |
187 | |
188 | |
189 // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) | |
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190 Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread, int exec_mode) { |
0 | 191 |
192 // Note: there is a safepoint safety issue here. No matter whether we enter | |
193 // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once | |
194 // the vframeArray is created. | |
195 // | |
196 | |
197 // Allocate our special deoptimization ResourceMark | |
198 DeoptResourceMark* dmark = new DeoptResourceMark(thread); | |
199 assert(thread->deopt_mark() == NULL, "Pending deopt!"); | |
200 thread->set_deopt_mark(dmark); | |
201 | |
202 frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect | |
203 RegisterMap map(thread, true); | |
204 RegisterMap dummy_map(thread, false); | |
205 // Now get the deoptee with a valid map | |
206 frame deoptee = stub_frame.sender(&map); | |
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207 // Set the deoptee nmethod |
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208 assert(thread->deopt_nmethod() == NULL, "Pending deopt!"); |
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209 thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null()); |
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210 bool skip_internal = thread->deopt_nmethod() != NULL && !thread->deopt_nmethod()->compiler()->is_jvmci(); |
0 | 211 |
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212 if (VerifyStack) { |
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213 thread->validate_frame_layout(); |
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214 } |
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215 |
0 | 216 // Create a growable array of VFrames where each VFrame represents an inlined |
217 // Java frame. This storage is allocated with the usual system arena. | |
218 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
219 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); | |
220 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
221 while (!vf->is_top()) { | |
222 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
223 chunk->push(compiledVFrame::cast(vf)); | |
224 vf = vf->sender(); | |
225 } | |
226 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
227 chunk->push(compiledVFrame::cast(vf)); | |
228 | |
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229 ScopeDesc* trap_scope = chunk->at(0)->scope(); |
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230 Handle exceptionObject; |
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231 if (trap_scope->rethrow_exception()) { |
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232 if (PrintDeoptimizationDetails) { |
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233 tty->print_cr("Exception to be rethrown in the interpreter for method %s::%s at bci %d", trap_scope->method()->method_holder()->name()->as_C_string(), trap_scope->method()->name()->as_C_string(), trap_scope->bci()); |
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234 } |
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235 GrowableArray<ScopeValue*>* expressions = trap_scope->expressions(); |
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236 guarantee(expressions != NULL && expressions->length() > 0, "must have exception to throw"); |
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237 ScopeValue* topOfStack = expressions->top(); |
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238 exceptionObject = StackValue::create_stack_value(&deoptee, &map, topOfStack)->get_obj(); |
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239 assert(exceptionObject() != NULL, "exception oop can not be null"); |
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240 } |
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241 |
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242 bool realloc_failures = false; |
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243 |
22298 | 244 #if defined(COMPILER2) || INCLUDE_JVMCI |
0 | 245 // Reallocate the non-escaping objects and restore their fields. Then |
246 // relock objects if synchronization on them was eliminated. | |
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247 #ifndef INCLUDE_JVMCI |
4777 | 248 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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249 if (EliminateAllocations) { |
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250 #endif // INCLUDE_JVMCI |
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251 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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252 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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253 |
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254 // The flag return_oop() indicates call sites which return oop |
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255 // in compiled code. Such sites include java method calls, |
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256 // runtime calls (for example, used to allocate new objects/arrays |
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257 // on slow code path) and any other calls generated in compiled code. |
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258 // It is not guaranteed that we can get such information here only |
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259 // by analyzing bytecode in deoptimized frames. This is why this flag |
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260 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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261 // If the previous frame was popped, we don't have a result. |
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262 bool save_oop_result = chunk->at(0)->scope()->return_oop() && !thread->popframe_forcing_deopt_reexecution(); |
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263 Handle return_value; |
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264 if (save_oop_result) { |
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265 // Reallocation may trigger GC. If deoptimization happened on return from |
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266 // call which returns oop we need to save it since it is not in oopmap. |
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267 oop result = deoptee.saved_oop_result(&map); |
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268 assert(result == NULL || result->is_oop(), "must be oop"); |
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269 return_value = Handle(thread, result); |
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270 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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271 if (TraceDeoptimization) { |
6843 | 272 ttyLocker ttyl; |
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273 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, (void *)result, thread); |
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274 } |
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275 } |
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276 if (objects != NULL) { |
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277 JRT_BLOCK |
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278 realloc_failures = realloc_objects(thread, &deoptee, objects, THREAD); |
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279 JRT_END |
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280 reassign_fields(&deoptee, &map, objects, realloc_failures, skip_internal); |
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281 #ifndef PRODUCT |
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282 if (TraceDeoptimization) { |
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283 ttyLocker ttyl; |
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284 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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285 print_objects(objects, realloc_failures); |
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286 } |
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287 #endif |
0 | 288 } |
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289 if (save_oop_result) { |
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290 // Restore result. |
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291 deoptee.set_saved_oop_result(&map, return_value()); |
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292 } |
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293 #ifndef INCLUDE_JVMCI |
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294 } |
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295 if (EliminateLocks) { |
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296 #endif // INCLUDE_JVMCI |
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297 #ifndef PRODUCT |
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298 bool first = true; |
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299 #endif |
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300 for (int i = 0; i < chunk->length(); i++) { |
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301 compiledVFrame* cvf = chunk->at(i); |
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302 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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303 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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304 if (monitors->is_nonempty()) { |
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305 relock_objects(monitors, thread, realloc_failures); |
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306 #ifndef PRODUCT |
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307 if (PrintDeoptimizationDetails) { |
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308 ttyLocker ttyl; |
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309 for (int j = 0; j < monitors->length(); j++) { |
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310 MonitorInfo* mi = monitors->at(j); |
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311 if (mi->eliminated()) { |
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312 if (first) { |
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313 first = false; |
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314 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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315 } |
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316 if (mi->owner_is_scalar_replaced()) { |
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317 Klass* k = java_lang_Class::as_Klass(mi->owner_klass()); |
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318 tty->print_cr(" failed reallocation for klass %s", k->external_name()); |
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319 } else { |
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320 tty->print_cr(" object <" INTPTR_FORMAT "> locked", (void *)mi->owner()); |
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321 } |
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322 } |
0 | 323 } |
324 } | |
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325 #endif |
0 | 326 } |
327 } | |
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328 #ifndef INCLUDE_JVMCI |
0 | 329 } |
330 } | |
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331 #endif // INCLUDE_JVMCI |
22298 | 332 #endif // COMPILER2 || INCLUDE_JVMCI |
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333 |
0 | 334 // Ensure that no safepoint is taken after pointers have been stored |
335 // in fields of rematerialized objects. If a safepoint occurs from here on | |
336 // out the java state residing in the vframeArray will be missed. | |
337 No_Safepoint_Verifier no_safepoint; | |
338 | |
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339 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk, realloc_failures); |
22298 | 340 #if defined(COMPILER2) || INCLUDE_JVMCI |
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341 if (realloc_failures) { |
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342 pop_frames_failed_reallocs(thread, array); |
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343 } |
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344 #endif |
0 | 345 |
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346 assert(thread->vframe_array_head() == NULL, "Pending deopt!"); |
0 | 347 thread->set_vframe_array_head(array); |
348 | |
349 // Now that the vframeArray has been created if we have any deferred local writes | |
350 // added by jvmti then we can free up that structure as the data is now in the | |
351 // vframeArray | |
352 | |
353 if (thread->deferred_locals() != NULL) { | |
354 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
355 int i = 0; | |
356 do { | |
357 // Because of inlining we could have multiple vframes for a single frame | |
358 // and several of the vframes could have deferred writes. Find them all. | |
359 if (list->at(i)->id() == array->original().id()) { | |
360 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
361 list->remove_at(i); | |
362 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
363 delete dlv; | |
364 } else { | |
365 i++; | |
366 } | |
367 } while ( i < list->length() ); | |
368 if (list->length() == 0) { | |
369 thread->set_deferred_locals(NULL); | |
370 // free the list and elements back to C heap. | |
371 delete list; | |
372 } | |
373 | |
374 } | |
375 | |
1692 | 376 #ifndef SHARK |
0 | 377 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
378 CodeBlob* cb = stub_frame.cb(); | |
379 // Verify we have the right vframeArray | |
380 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
381 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
382 | |
1204 | 383 // If the deopt call site is a MethodHandle invoke call site we have |
384 // to adjust the unpack_sp. | |
385 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
386 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
387 unpack_sp = deoptee.unextended_sp(); | |
388 | |
0 | 389 #ifdef ASSERT |
15104 | 390 assert(cb->is_deoptimization_stub() || |
391 cb->is_uncommon_trap_stub() || | |
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392 strcmp("Stub<DeoptimizationStub.deoptimizationHandler>", cb->name()) == 0 || |
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393 strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>", cb->name()) == 0, |
15104 | 394 err_msg("unexpected code blob: %s", cb->name())); |
0 | 395 #endif |
1692 | 396 #else |
397 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
398 #endif // !SHARK | |
399 | |
0 | 400 // This is a guarantee instead of an assert because if vframe doesn't match |
401 // we will unpack the wrong deoptimized frame and wind up in strange places | |
402 // where it will be very difficult to figure out what went wrong. Better | |
403 // to die an early death here than some very obscure death later when the | |
404 // trail is cold. | |
405 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
406 // in that it will fail to detect a problem when there is one. This needs | |
407 // more work in tiger timeframe. | |
408 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
409 | |
410 int number_of_frames = array->frames(); | |
411 | |
412 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
413 // virtual activation, which is the reverse of the elements in the vframes array. | |
6197 | 414 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
0 | 415 // +1 because we always have an interpreter return address for the final slot. |
6197 | 416 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
0 | 417 int popframe_extra_args = 0; |
418 // Create an interpreter return address for the stub to use as its return | |
419 // address so the skeletal frames are perfectly walkable | |
420 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
421 | |
422 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
423 // activation be put back on the expression stack of the caller for reexecution | |
424 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
425 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
426 } | |
427 | |
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428 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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429 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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430 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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431 // |
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432 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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433 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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434 |
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435 // It's possible that the number of paramters at the call site is |
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436 // different than number of arguments in the callee when method |
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437 // handles are used. If the caller is interpreted get the real |
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438 // value so that the proper amount of space can be added to it's |
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439 // frame. |
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440 bool caller_was_method_handle = false; |
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441 if (deopt_sender.is_interpreted_frame()) { |
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442 methodHandle method = deopt_sender.interpreter_frame_method(); |
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443 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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444 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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445 // Method handle invokes may involve fairly arbitrary chains of |
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446 // calls so it's impossible to know how much actual space the |
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447 // caller has for locals. |
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448 caller_was_method_handle = true; |
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449 } |
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450 } |
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451 |
0 | 452 // |
453 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
454 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
455 // frame_sizes/frame_pcs[n] youngest frame (int) | |
456 // | |
457 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
458 // owns the space for the return address to it's caller). Confusing ain't it. | |
459 // | |
460 // The vframe array can address vframes with indices running from | |
461 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
462 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
463 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
464 // so things look a little strange in this loop. | |
465 // | |
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466 int callee_parameters = 0; |
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467 int callee_locals = 0; |
0 | 468 for (int index = 0; index < array->frames(); index++ ) { |
469 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
470 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
471 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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472 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(callee_parameters, |
0 | 473 callee_locals, |
474 index == 0, | |
475 popframe_extra_args); | |
476 // This pc doesn't have to be perfect just good enough to identify the frame | |
477 // as interpreted so the skeleton frame will be walkable | |
478 // The correct pc will be set when the skeleton frame is completely filled out | |
479 // The final pc we store in the loop is wrong and will be overwritten below | |
480 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
481 | |
482 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
483 callee_locals = array->element(index)->method()->max_locals(); | |
484 popframe_extra_args = 0; | |
485 } | |
486 | |
487 // Compute whether the root vframe returns a float or double value. | |
488 BasicType return_type; | |
489 { | |
490 HandleMark hm; | |
491 methodHandle method(thread, array->element(0)->method()); | |
2142 | 492 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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493 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
0 | 494 } |
495 | |
496 // Compute information for handling adapters and adjusting the frame size of the caller. | |
497 int caller_adjustment = 0; | |
498 | |
499 // Compute the amount the oldest interpreter frame will have to adjust | |
500 // its caller's stack by. If the caller is a compiled frame then | |
501 // we pretend that the callee has no parameters so that the | |
502 // extension counts for the full amount of locals and not just | |
503 // locals-parms. This is because without a c2i adapter the parm | |
504 // area as created by the compiled frame will not be usable by | |
505 // the interpreter. (Depending on the calling convention there | |
506 // may not even be enough space). | |
507 | |
508 // QQQ I'd rather see this pushed down into last_frame_adjust | |
509 // and have it take the sender (aka caller). | |
510 | |
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511 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
0 | 512 caller_adjustment = last_frame_adjust(0, callee_locals); |
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513 } else if (callee_locals > callee_parameters) { |
0 | 514 // The caller frame may need extending to accommodate |
515 // non-parameter locals of the first unpacked interpreted frame. | |
516 // Compute that adjustment. | |
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517 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
0 | 518 } |
519 | |
520 // If the sender is deoptimized the we must retrieve the address of the handler | |
521 // since the frame will "magically" show the original pc before the deopt | |
522 // and we'd undo the deopt. | |
523 | |
524 frame_pcs[0] = deopt_sender.raw_pc(); | |
525 | |
1692 | 526 #ifndef SHARK |
0 | 527 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
1692 | 528 #endif // SHARK |
0 | 529 |
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530 #ifdef INCLUDE_JVMCI |
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531 if (exceptionObject() != NULL) { |
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532 thread->set_exception_oop(exceptionObject()); |
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533 exec_mode = Unpack_exception; |
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534 } |
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535 #endif |
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536 |
0 | 537 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, |
538 caller_adjustment * BytesPerWord, | |
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539 caller_was_method_handle ? 0 : callee_parameters, |
0 | 540 number_of_frames, |
541 frame_sizes, | |
542 frame_pcs, | |
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543 return_type, |
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544 exec_mode); |
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545 // On some platforms, we need a way to pass some platform dependent |
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546 // information to the unpacking code so the skeletal frames come out |
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547 // correct (initial fp value, unextended sp, ...) |
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548 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
0 | 549 |
550 if (array->frames() > 1) { | |
551 if (VerifyStack && TraceDeoptimization) { | |
6843 | 552 ttyLocker ttyl; |
0 | 553 tty->print_cr("Deoptimizing method containing inlining"); |
554 } | |
555 } | |
556 | |
557 array->set_unroll_block(info); | |
558 return info; | |
559 } | |
560 | |
561 // Called to cleanup deoptimization data structures in normal case | |
562 // after unpacking to stack and when stack overflow error occurs | |
563 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
564 vframeArray *array) { | |
565 | |
566 // Get array if coming from exception | |
567 if (array == NULL) { | |
568 array = thread->vframe_array_head(); | |
569 } | |
570 thread->set_vframe_array_head(NULL); | |
571 | |
572 // Free the previous UnrollBlock | |
573 vframeArray* old_array = thread->vframe_array_last(); | |
574 thread->set_vframe_array_last(array); | |
575 | |
576 if (old_array != NULL) { | |
577 UnrollBlock* old_info = old_array->unroll_block(); | |
578 old_array->set_unroll_block(NULL); | |
579 delete old_info; | |
580 delete old_array; | |
581 } | |
582 | |
583 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
584 // inside the vframeArray (StackValueCollections) | |
585 | |
586 delete thread->deopt_mark(); | |
587 thread->set_deopt_mark(NULL); | |
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588 thread->set_deopt_nmethod(NULL); |
0 | 589 |
590 | |
591 if (JvmtiExport::can_pop_frame()) { | |
592 #ifndef CC_INTERP | |
593 // Regardless of whether we entered this routine with the pending | |
594 // popframe condition bit set, we should always clear it now | |
595 thread->clear_popframe_condition(); | |
596 #else | |
597 // C++ interpeter will clear has_pending_popframe when it enters | |
598 // with method_resume. For deopt_resume2 we clear it now. | |
599 if (thread->popframe_forcing_deopt_reexecution()) | |
600 thread->clear_popframe_condition(); | |
601 #endif /* CC_INTERP */ | |
602 } | |
603 | |
604 // unpack_frames() is called at the end of the deoptimization handler | |
605 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
606 // so that an asynchronous stack walker can work again. This counter is | |
607 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
608 // the beginning of uncommon_trap(). | |
609 thread->dec_in_deopt_handler(); | |
610 } | |
611 | |
612 | |
613 // Return BasicType of value being returned | |
614 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
615 | |
616 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
617 // allocate will be freed at the end of the routine. | |
618 | |
619 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
620 // but makes the entry a little slower. There is however a little dance we have to | |
621 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
622 ResetNoHandleMark rnhm; // No-op in release/product versions | |
623 HandleMark hm; | |
624 | |
625 frame stub_frame = thread->last_frame(); | |
626 | |
627 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
628 // must point to the vframeArray for the unpack frame. | |
629 vframeArray* array = thread->vframe_array_head(); | |
630 | |
631 #ifndef PRODUCT | |
632 if (TraceDeoptimization) { | |
6843 | 633 ttyLocker ttyl; |
0 | 634 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
635 } | |
636 #endif | |
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637 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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638 stub_frame.pc(), stub_frame.sp(), exec_mode); |
0 | 639 |
640 UnrollBlock* info = array->unroll_block(); | |
641 | |
642 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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643 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
0 | 644 |
645 BasicType bt = info->return_type(); | |
646 | |
647 // If we have an exception pending, claim that the return type is an oop | |
648 // so the deopt_blob does not overwrite the exception_oop. | |
649 | |
650 if (exec_mode == Unpack_exception) | |
651 bt = T_OBJECT; | |
652 | |
653 // Cleanup thread deopt data | |
654 cleanup_deopt_info(thread, array); | |
655 | |
656 #ifndef PRODUCT | |
657 if (VerifyStack) { | |
658 ResourceMark res_mark; | |
659 | |
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660 thread->validate_frame_layout(); |
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661 |
0 | 662 // Verify that the just-unpacked frames match the interpreter's |
663 // notions of expression stack and locals | |
664 vframeArray* cur_array = thread->vframe_array_last(); | |
665 RegisterMap rm(thread, false); | |
666 rm.set_include_argument_oops(false); | |
667 bool is_top_frame = true; | |
668 int callee_size_of_parameters = 0; | |
669 int callee_max_locals = 0; | |
670 for (int i = 0; i < cur_array->frames(); i++) { | |
671 vframeArrayElement* el = cur_array->element(i); | |
672 frame* iframe = el->iframe(); | |
673 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
674 | |
675 // Get the oop map for this bci | |
676 InterpreterOopMap mask; | |
677 int cur_invoke_parameter_size = 0; | |
678 bool try_next_mask = false; | |
679 int next_mask_expression_stack_size = -1; | |
680 int top_frame_expression_stack_adjustment = 0; | |
681 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
682 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
683 BytecodeStream str(mh); | |
684 str.set_start(iframe->interpreter_frame_bci()); | |
685 int max_bci = mh->code_size(); | |
686 // Get to the next bytecode if possible | |
687 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
688 // Check to see if we can grab the number of outgoing arguments | |
689 // at an uncommon trap for an invoke (where the compiler | |
690 // generates debug info before the invoke has executed) | |
691 Bytecodes::Code cur_code = str.next(); | |
10390 | 692 if (cur_code == Bytecodes::_invokevirtual || |
693 cur_code == Bytecodes::_invokespecial || | |
694 cur_code == Bytecodes::_invokestatic || | |
695 cur_code == Bytecodes::_invokeinterface || | |
696 cur_code == Bytecodes::_invokedynamic) { | |
2142 | 697 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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698 Symbol* signature = invoke.signature(); |
0 | 699 ArgumentSizeComputer asc(signature); |
700 cur_invoke_parameter_size = asc.size(); | |
10390 | 701 if (invoke.has_receiver()) { |
0 | 702 // Add in receiver |
703 ++cur_invoke_parameter_size; | |
704 } | |
10390 | 705 if (i != 0 && !invoke.is_invokedynamic() && MethodHandles::has_member_arg(invoke.klass(), invoke.name())) { |
706 callee_size_of_parameters++; | |
707 } | |
0 | 708 } |
709 if (str.bci() < max_bci) { | |
710 Bytecodes::Code bc = str.next(); | |
711 if (bc >= 0) { | |
712 // The interpreter oop map generator reports results before | |
713 // the current bytecode has executed except in the case of | |
714 // calls. It seems to be hard to tell whether the compiler | |
715 // has emitted debug information matching the "state before" | |
716 // a given bytecode or the state after, so we try both | |
717 switch (cur_code) { | |
718 case Bytecodes::_invokevirtual: | |
719 case Bytecodes::_invokespecial: | |
720 case Bytecodes::_invokestatic: | |
721 case Bytecodes::_invokeinterface: | |
10390 | 722 case Bytecodes::_invokedynamic: |
0 | 723 case Bytecodes::_athrow: |
724 break; | |
725 default: { | |
726 InterpreterOopMap next_mask; | |
727 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
728 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
729 // Need to subtract off the size of the result type of | |
730 // the bytecode because this is not described in the | |
731 // debug info but returned to the interpreter in the TOS | |
732 // caching register | |
733 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
734 if (bytecode_result_type != T_ILLEGAL) { | |
735 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
736 } | |
737 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
738 try_next_mask = true; | |
739 break; | |
740 } | |
741 } | |
742 } | |
743 } | |
744 | |
745 // Verify stack depth and oops in frame | |
746 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
747 if (!( | |
748 /* SPARC */ | |
749 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
750 /* x86 */ | |
751 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
752 (try_next_mask && | |
753 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
754 top_frame_expression_stack_adjustment))) || | |
755 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
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756 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute || el->should_reexecute()) && |
0 | 757 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) |
758 )) { | |
759 ttyLocker ttyl; | |
760 | |
761 // Print out some information that will help us debug the problem | |
762 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
763 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
764 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
765 iframe->interpreter_frame_expression_stack_size()); | |
766 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
767 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
768 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
769 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
770 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
771 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
772 tty->print_cr(" exec_mode = %d", exec_mode); | |
773 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
774 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
775 tty->print_cr(" Interpreted frames:"); | |
776 for (int k = 0; k < cur_array->frames(); k++) { | |
777 vframeArrayElement* el = cur_array->element(k); | |
778 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
779 } | |
780 cur_array->print_on_2(tty); | |
781 guarantee(false, "wrong number of expression stack elements during deopt"); | |
782 } | |
783 VerifyOopClosure verify; | |
7179
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784 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
0 | 785 callee_size_of_parameters = mh->size_of_parameters(); |
786 callee_max_locals = mh->max_locals(); | |
787 is_top_frame = false; | |
788 } | |
789 } | |
790 #endif /* !PRODUCT */ | |
791 | |
792 | |
793 return bt; | |
794 JRT_END | |
795 | |
796 | |
797 int Deoptimization::deoptimize_dependents() { | |
798 Threads::deoptimized_wrt_marked_nmethods(); | |
799 return 0; | |
800 } | |
801 | |
802 | |
22298 | 803 #if defined(COMPILER2) || INCLUDE_JVMCI |
0 | 804 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
805 Handle pending_exception(thread->pending_exception()); | |
806 const char* exception_file = thread->exception_file(); | |
807 int exception_line = thread->exception_line(); | |
808 thread->clear_pending_exception(); | |
809 | |
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810 bool failures = false; |
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811 |
0 | 812 for (int i = 0; i < objects->length(); i++) { |
813 assert(objects->at(i)->is_object(), "invalid debug information"); | |
814 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
815 | |
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816 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 817 oop obj = NULL; |
818 | |
819 if (k->oop_is_instance()) { | |
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820 InstanceKlass* ik = InstanceKlass::cast(k()); |
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821 obj = ik->allocate_instance(THREAD); |
0 | 822 } else if (k->oop_is_typeArray()) { |
6831
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8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
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823 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 824 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
825 int len = sv->field_size() / type2size[ak->element_type()]; | |
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826 obj = ak->allocate(len, THREAD); |
0 | 827 } else if (k->oop_is_objArray()) { |
6831
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828 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
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829 obj = ak->allocate(sv->field_size(), THREAD); |
0 | 830 } |
831 | |
20705
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832 if (obj == NULL) { |
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833 failures = true; |
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834 } |
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835 |
0 | 836 assert(sv->value().is_null(), "redundant reallocation"); |
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837 assert(obj != NULL || HAS_PENDING_EXCEPTION, "allocation should succeed or we should get an exception"); |
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838 CLEAR_PENDING_EXCEPTION; |
0 | 839 sv->set_value(obj); |
840 } | |
841 | |
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842 if (failures) { |
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843 THROW_OOP_(Universe::out_of_memory_error_realloc_objects(), failures); |
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844 } else if (pending_exception.not_null()) { |
0 | 845 thread->set_pending_exception(pending_exception(), exception_file, exception_line); |
846 } | |
847 | |
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848 return failures; |
0 | 849 } |
850 | |
851 // restore elements of an eliminated type array | |
852 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
853 int index = 0; | |
44
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854 intptr_t val; |
0 | 855 |
856 for (int i = 0; i < sv->field_size(); i++) { | |
857 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
858 switch(type) { | |
44
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859 case T_LONG: case T_DOUBLE: { |
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860 assert(value->type() == T_INT, "Agreement."); |
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861 StackValue* low = |
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862 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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863 #ifdef _LP64 |
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864 jlong res = (jlong)low->get_int(); |
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865 #else |
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866 #ifdef SPARC |
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867 // For SPARC we have to swap high and low words. |
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868 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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869 #else |
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870 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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871 #endif //SPARC |
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872 #endif |
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873 obj->long_at_put(index, res); |
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874 break; |
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875 } |
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876 |
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877 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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878 case T_INT: case T_FLOAT: { // 4 bytes. |
44
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879 assert(value->type() == T_INT, "Agreement."); |
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880 bool big_value = false; |
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881 if (i + 1 < sv->field_size() && type == T_INT) { |
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882 if (sv->field_at(i)->is_location()) { |
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883 Location::Type type = ((LocationValue*) sv->field_at(i))->location().type(); |
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884 if (type == Location::dbl || type == Location::lng) { |
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885 big_value = true; |
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886 } |
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887 } else if (sv->field_at(i)->is_constant_int()) { |
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888 ScopeValue* next_scope_field = sv->field_at(i + 1); |
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889 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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890 big_value = true; |
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891 } |
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892 } |
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893 } |
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894 |
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895 if (big_value) { |
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896 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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897 #ifdef _LP64 |
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898 jlong res = (jlong)low->get_int(); |
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899 #else |
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900 #ifdef SPARC |
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901 // For SPARC we have to swap high and low words. |
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902 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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903 #else |
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904 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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905 #endif //SPARC |
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906 #endif |
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907 obj->int_at_put(index, (jint)*((jint*)&res)); |
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908 obj->int_at_put(++index, (jint)*(((jint*)&res) + 1)); |
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909 } else { |
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910 val = value->get_int(); |
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911 obj->int_at_put(index, (jint)*((jint*)&val)); |
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|
912 } |
44
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|
913 break; |
18133
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|
914 } |
44
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|
915 |
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916 case T_SHORT: case T_CHAR: // 2 bytes |
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917 assert(value->type() == T_INT, "Agreement."); |
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918 val = value->get_int(); |
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919 obj->short_at_put(index, (jshort)*((jint*)&val)); |
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920 break; |
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921 |
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|
922 case T_BOOLEAN: case T_BYTE: // 1 byte |
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923 assert(value->type() == T_INT, "Agreement."); |
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924 val = value->get_int(); |
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925 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
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|
926 break; |
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927 |
0 | 928 default: |
929 ShouldNotReachHere(); | |
930 } | |
931 index++; | |
932 } | |
933 } | |
934 | |
935 | |
936 // restore fields of an eliminated object array | |
937 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
938 for (int i = 0; i < sv->field_size(); i++) { | |
939 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
940 assert(value->type() == T_OBJECT, "object element expected"); | |
941 obj->obj_at_put(i, value->get_obj()()); | |
942 } | |
943 } | |
944 | |
7222 | 945 class ReassignedField { |
946 public: | |
947 int _offset; | |
948 BasicType _type; | |
949 public: | |
950 ReassignedField() { | |
951 _offset = 0; | |
952 _type = T_ILLEGAL; | |
953 } | |
954 }; | |
7137
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955 |
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|
956 int compare(ReassignedField* left, ReassignedField* right) { |
7222 | 957 return left->_offset - right->_offset; |
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958 } |
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959 |
6948
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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
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960 // Restore fields of an eliminated instance object using the same field order |
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961 // returned by HotSpotResolvedObjectTypeImpl.getInstanceFields(true) |
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962 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj, bool skip_internal) { |
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963 if (klass->superklass() != NULL) { |
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964 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj, skip_internal); |
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965 } |
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966 |
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967 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
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968 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
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969 if (!fs.access_flags().is_static() && (!skip_internal || !fs.access_flags().is_internal())) { |
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970 ReassignedField field; |
7222 | 971 field._offset = fs.offset(); |
972 field._type = FieldType::basic_type(fs.signature()); | |
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973 fields->append(field); |
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974 } |
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975 } |
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976 fields->sort(compare); |
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977 for (int i = 0; i < fields->length(); i++) { |
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978 intptr_t val; |
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979 ScopeValue* scope_field = sv->field_at(svIndex); |
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980 StackValue* value = StackValue::create_stack_value(fr, reg_map, scope_field); |
7222 | 981 int offset = fields->at(i)._offset; |
982 BasicType type = fields->at(i)._type; | |
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983 switch (type) { |
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984 case T_OBJECT: case T_ARRAY: |
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985 assert(value->type() == T_OBJECT, "Agreement."); |
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986 obj->obj_field_put(offset, value->get_obj()()); |
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987 break; |
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988 |
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989 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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990 case T_INT: case T_FLOAT: { // 4 bytes. |
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991 assert(value->type() == T_INT, "Agreement."); |
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992 bool big_value = false; |
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993 if (i+1 < fields->length() && fields->at(i+1)._type == T_INT) { |
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994 if (scope_field->is_location()) { |
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995 Location::Type type = ((LocationValue*) scope_field)->location().type(); |
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996 if (type == Location::dbl || type == Location::lng) { |
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997 big_value = true; |
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998 } |
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999 } |
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1000 if (scope_field->is_constant_int()) { |
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1001 ScopeValue* next_scope_field = sv->field_at(svIndex + 1); |
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1002 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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1003 big_value = true; |
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1004 } |
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1005 } |
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1006 } |
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1007 |
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1008 if (big_value) { |
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1009 i++; |
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1010 assert(i < fields->length(), "second T_INT field needed"); |
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1011 assert(fields->at(i)._type == T_INT, "T_INT field needed"); |
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1012 } else { |
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1013 val = value->get_int(); |
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1014 obj->int_field_put(offset, (jint)*((jint*)&val)); |
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1015 break; |
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1016 } |
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1017 } |
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1018 /* no break */ |
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1019 |
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1020 case T_LONG: case T_DOUBLE: { |
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1021 assert(value->type() == T_INT, "Agreement."); |
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1022 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
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1023 #ifdef _LP64 |
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1024 jlong res = (jlong)low->get_int(); |
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1025 #else |
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1026 #ifdef SPARC |
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1027 // For SPARC we have to swap high and low words. |
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1028 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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1029 #else |
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1030 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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1031 #endif //SPARC |
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1032 #endif |
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1033 obj->long_field_put(offset, res); |
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1034 break; |
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1035 } |
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1036 |
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1037 case T_SHORT: case T_CHAR: // 2 bytes |
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1038 assert(value->type() == T_INT, "Agreement."); |
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1039 val = value->get_int(); |
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1040 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
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1041 break; |
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1042 |
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1043 case T_BOOLEAN: case T_BYTE: // 1 byte |
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1044 assert(value->type() == T_INT, "Agreement."); |
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1045 val = value->get_int(); |
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1046 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
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1047 break; |
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1048 |
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1049 default: |
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1050 ShouldNotReachHere(); |
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1051 } |
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1052 svIndex++; |
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1053 } |
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1054 return svIndex; |
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1055 } |
0 | 1056 |
1057 // restore fields of all eliminated objects and arrays | |
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1058 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects, bool realloc_failures, bool skip_internal) { |
0 | 1059 for (int i = 0; i < objects->length(); i++) { |
1060 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1061 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 1062 Handle obj = sv->value(); |
20705
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1063 assert(obj.not_null() || realloc_failures, "reallocation was missed"); |
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1064 if (obj.is_null()) { |
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1065 continue; |
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1066 } |
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1067 if (PrintDeoptimizationDetails) { |
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1068 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
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1069 } |
0 | 1070 |
1071 if (k->oop_is_instance()) { | |
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1072 InstanceKlass* ik = InstanceKlass::cast(k()); |
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1073 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj(), skip_internal); |
0 | 1074 } else if (k->oop_is_typeArray()) { |
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1075 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
0 | 1076 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
1077 } else if (k->oop_is_objArray()) { | |
1078 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
1079 } | |
1080 } | |
1081 } | |
1082 | |
1083 | |
1084 // relock objects for which synchronization was eliminated | |
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1085 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread, bool realloc_failures) { |
0 | 1086 for (int i = 0; i < monitors->length(); i++) { |
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1087 MonitorInfo* mon_info = monitors->at(i); |
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1088 if (mon_info->eliminated()) { |
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1089 assert(!mon_info->owner_is_scalar_replaced() || realloc_failures, "reallocation was missed"); |
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1090 if (!mon_info->owner_is_scalar_replaced()) { |
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1091 Handle obj = Handle(mon_info->owner()); |
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1092 markOop mark = obj->mark(); |
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1093 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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1094 // New allocated objects may have the mark set to anonymously biased. |
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1095 // Also the deoptimized method may called methods with synchronization |
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1096 // where the thread-local object is bias locked to the current thread. |
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1097 assert(mark->is_biased_anonymously() || |
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1098 mark->biased_locker() == thread, "should be locked to current thread"); |
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1099 // Reset mark word to unbiased prototype. |
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1100 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1101 obj->set_mark(unbiased_prototype); |
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1102 } |
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1103 BasicLock* lock = mon_info->lock(); |
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1104 ObjectSynchronizer::slow_enter(obj, lock, thread); |
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1105 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
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1106 } |
0 | 1107 } |
1108 } | |
1109 } | |
1110 | |
1111 | |
1112 #ifndef PRODUCT | |
1113 // print information about reallocated objects | |
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1114 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects, bool realloc_failures) { |
0 | 1115 fieldDescriptor fd; |
1116 | |
1117 for (int i = 0; i < objects->length(); i++) { | |
1118 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1119 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
0 | 1120 Handle obj = sv->value(); |
1121 | |
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1122 tty->print(" object <" INTPTR_FORMAT "> of type ", (void *)sv->value()()); |
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1123 k->print_value(); |
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1124 assert(obj.not_null() || realloc_failures, "reallocation was missed"); |
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1125 if (obj.is_null()) { |
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1126 tty->print(" allocation failed"); |
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1127 } else { |
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1128 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
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1129 } |
0 | 1130 tty->cr(); |
1131 | |
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1132 if (Verbose && !obj.is_null()) { |
0 | 1133 k->oop_print_on(obj(), tty); |
1134 } | |
1135 } | |
1136 } | |
1137 #endif | |
22298 | 1138 #endif // COMPILER2 || INCLUDE_JVMCI |
0 | 1139 |
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1140 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk, bool realloc_failures) { |
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1141 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
0 | 1142 |
1143 #ifndef PRODUCT | |
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1144 if (PrintDeoptimizationDetails) { |
0 | 1145 ttyLocker ttyl; |
1146 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
1147 fr.print_on(tty); | |
1148 tty->print_cr(" Virtual frames (innermost first):"); | |
1149 for (int index = 0; index < chunk->length(); index++) { | |
1150 compiledVFrame* vf = chunk->at(index); | |
1151 tty->print(" %2d - ", index); | |
1152 vf->print_value(); | |
1153 int bci = chunk->at(index)->raw_bci(); | |
1154 const char* code_name; | |
1155 if (bci == SynchronizationEntryBCI) { | |
1156 code_name = "sync entry"; | |
1157 } else { | |
2142 | 1158 Bytecodes::Code code = vf->method()->code_at(bci); |
0 | 1159 code_name = Bytecodes::name(code); |
1160 } | |
1161 tty->print(" - %s", code_name); | |
1162 tty->print_cr(" @ bci %d ", bci); | |
1163 if (Verbose) { | |
1164 vf->print(); | |
1165 tty->cr(); | |
1166 } | |
1167 } | |
1168 } | |
1169 #endif | |
1170 | |
1171 // Register map for next frame (used for stack crawl). We capture | |
1172 // the state of the deopt'ing frame's caller. Thus if we need to | |
1173 // stuff a C2I adapter we can properly fill in the callee-save | |
1174 // register locations. | |
1175 frame caller = fr.sender(reg_map); | |
1176 int frame_size = caller.sp() - fr.sp(); | |
1177 | |
1178 frame sender = caller; | |
1179 | |
1180 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
1181 // the vframeArray containing the unpacking information is allocated in the C heap. | |
1182 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
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1183 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr, realloc_failures); |
0 | 1184 |
1185 // Compare the vframeArray to the collected vframes | |
1186 assert(array->structural_compare(thread, chunk), "just checking"); | |
1187 | |
1188 #ifndef PRODUCT | |
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1189 if (PrintDeoptimizationDetails) { |
0 | 1190 ttyLocker ttyl; |
1191 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
1192 } | |
1193 #endif // PRODUCT | |
1194 | |
1195 return array; | |
1196 } | |
1197 | |
22298 | 1198 #if defined(COMPILER2) || INCLUDE_JVMCI |
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1199 void Deoptimization::pop_frames_failed_reallocs(JavaThread* thread, vframeArray* array) { |
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1200 // Reallocation of some scalar replaced objects failed. Record |
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1201 // that we need to pop all the interpreter frames for the |
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1202 // deoptimized compiled frame. |
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1203 assert(thread->frames_to_pop_failed_realloc() == 0, "missed frames to pop?"); |
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1204 thread->set_frames_to_pop_failed_realloc(array->frames()); |
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1205 // Unlock all monitors here otherwise the interpreter will see a |
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1206 // mix of locked and unlocked monitors (because of failed |
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1207 // reallocations of synchronized objects) and be confused. |
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1208 for (int i = 0; i < array->frames(); i++) { |
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1209 MonitorChunk* monitors = array->element(i)->monitors(); |
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1210 if (monitors != NULL) { |
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1211 for (int j = 0; j < monitors->number_of_monitors(); j++) { |
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1212 BasicObjectLock* src = monitors->at(j); |
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1213 if (src->obj() != NULL) { |
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1214 ObjectSynchronizer::fast_exit(src->obj(), src->lock(), thread); |
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1215 } |
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1216 } |
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1217 array->element(i)->free_monitors(thread); |
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1218 #ifdef ASSERT |
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1219 array->element(i)->set_removed_monitors(); |
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1220 #endif |
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1221 } |
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1222 } |
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1223 } |
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1224 #endif |
0 | 1225 |
1226 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
1227 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
1228 for (int i = 0; i < monitors->length(); i++) { | |
1229 MonitorInfo* mon_info = monitors->at(i); | |
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1230 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
0 | 1231 objects_to_revoke->append(Handle(mon_info->owner())); |
1232 } | |
1233 } | |
1234 } | |
1235 | |
1236 | |
1237 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
1238 if (!UseBiasedLocking) { | |
1239 return; | |
1240 } | |
1241 | |
1242 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1243 | |
1244 // Unfortunately we don't have a RegisterMap available in most of | |
1245 // the places we want to call this routine so we need to walk the | |
1246 // stack again to update the register map. | |
1247 if (map == NULL || !map->update_map()) { | |
1248 StackFrameStream sfs(thread, true); | |
1249 bool found = false; | |
1250 while (!found && !sfs.is_done()) { | |
1251 frame* cur = sfs.current(); | |
1252 sfs.next(); | |
1253 found = cur->id() == fr.id(); | |
1254 } | |
1255 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
1256 map = sfs.register_map(); | |
1257 } | |
1258 | |
1259 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
1260 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1261 // Revoke monitors' biases in all scopes | |
1262 while (!cvf->is_top()) { | |
1263 collect_monitors(cvf, objects_to_revoke); | |
1264 cvf = compiledVFrame::cast(cvf->sender()); | |
1265 } | |
1266 collect_monitors(cvf, objects_to_revoke); | |
1267 | |
1268 if (SafepointSynchronize::is_at_safepoint()) { | |
1269 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1270 } else { | |
1271 BiasedLocking::revoke(objects_to_revoke); | |
1272 } | |
1273 } | |
1274 | |
1275 | |
1276 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
1277 if (!UseBiasedLocking) { | |
1278 return; | |
1279 } | |
1280 | |
1281 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
1282 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
1283 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
1284 if (jt->has_last_Java_frame()) { | |
1285 StackFrameStream sfs(jt, true); | |
1286 while (!sfs.is_done()) { | |
1287 frame* cur = sfs.current(); | |
1288 if (cb->contains(cur->pc())) { | |
1289 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
1290 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1291 // Revoke monitors' biases in all scopes | |
1292 while (!cvf->is_top()) { | |
1293 collect_monitors(cvf, objects_to_revoke); | |
1294 cvf = compiledVFrame::cast(cvf->sender()); | |
1295 } | |
1296 collect_monitors(cvf, objects_to_revoke); | |
1297 } | |
1298 sfs.next(); | |
1299 } | |
1300 } | |
1301 } | |
1302 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
1303 } | |
1304 | |
1305 | |
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|
1306 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
0 | 1307 assert(fr.can_be_deoptimized(), "checking frame type"); |
1308 | |
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1309 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
0 | 1310 |
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1311 if (LogCompilation && xtty != NULL) { |
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1312 nmethod* nm = fr.cb()->as_nmethod_or_null(); |
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1313 assert(nm != NULL, "only nmethods can deopt"); |
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1314 |
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1315 ttyLocker ttyl; |
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Tom Rodriguez <tom.rodriguez@oracle.com>
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1316 xtty->begin_head("deoptimized thread='" UINTX_FORMAT "'", thread->osthread()->thread_id()); |
18225
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1317 nm->log_identity(xtty); |
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1318 xtty->end_head(); |
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1319 for (ScopeDesc* sd = nm->scope_desc_at(fr.pc()); ; sd = sd->sender()) { |
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1320 xtty->begin_elem("jvms bci='%d'", sd->bci()); |
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1321 xtty->method(sd->method()); |
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1322 xtty->end_elem(); |
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1323 if (sd->is_top()) break; |
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1324 } |
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1325 xtty->tail("deoptimized"); |
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1326 } |
0 | 1327 |
1328 // Patch the nmethod so that when execution returns to it we will | |
1329 // deopt the execution state and return to the interpreter. | |
1330 fr.deoptimize(thread); | |
1331 } | |
1332 | |
1333 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map) { | |
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Bernhard Urban <bernhard.urban@jku.at>
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1334 deoptimize(thread, fr, map, Reason_constraint); |
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1335 } |
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1336 |
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1337 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
0 | 1338 // Deoptimize only if the frame comes from compile code. |
1339 // Do not deoptimize the frame which is already patched | |
1340 // during the execution of the loops below. | |
1341 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
1342 return; | |
1343 } | |
1344 ResourceMark rm; | |
1345 DeoptimizationMarker dm; | |
1346 if (UseBiasedLocking) { | |
1347 revoke_biases_of_monitors(thread, fr, map); | |
1348 } | |
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1349 deoptimize_single_frame(thread, fr, reason); |
0 | 1350 |
1351 } | |
1352 | |
1353 | |
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1354 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1355 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
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1356 "can only deoptimize other thread at a safepoint"); |
0 | 1357 // Compute frame and register map based on thread and sp. |
1358 RegisterMap reg_map(thread, UseBiasedLocking); | |
1359 frame fr = thread->last_frame(); | |
1360 while (fr.id() != id) { | |
1361 fr = fr.sender(®_map); | |
1362 } | |
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1363 deoptimize(thread, fr, ®_map, reason); |
0 | 1364 } |
1365 | |
1366 | |
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1367 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1368 if (thread == Thread::current()) { |
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1369 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
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1370 } else { |
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1371 VM_DeoptimizeFrame deopt(thread, id, reason); |
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1372 VMThread::execute(&deopt); |
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1373 } |
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1374 } |
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1375 |
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Bernhard Urban <bernhard.urban@jku.at>
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1376 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id) { |
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1377 deoptimize_frame(thread, id, Reason_constraint); |
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1378 } |
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1379 |
0 | 1380 // JVMTI PopFrame support |
1381 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
1382 { | |
1383 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
1384 } | |
1385 JRT_END | |
1386 | |
1387 | |
22298 | 1388 #if defined(COMPILER2) || defined(SHARK) || INCLUDE_JVMCI |
0 | 1389 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
1390 // in case of an unresolved klass entry, load the class. | |
1391 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
6725
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6964458: Reimplement class meta-data storage to use native memory
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1392 Klass* tk = constant_pool->klass_at(index, CHECK); |
0 | 1393 return; |
1394 } | |
1395 | |
1396 if (!constant_pool->tag_at(index).is_symbol()) return; | |
1397 | |
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18fb7da42534
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1398 Handle class_loader (THREAD, constant_pool->pool_holder()->class_loader()); |
2177
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|
1399 Symbol* symbol = constant_pool->symbol_at(index); |
0 | 1400 |
1401 // class name? | |
1402 if (symbol->byte_at(0) != '(') { | |
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1403 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1404 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
1405 return; | |
1406 } | |
1407 | |
1408 // then it must be a signature! | |
2177
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1409 ResourceMark rm(THREAD); |
0 | 1410 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
1411 if (ss.is_object()) { | |
2177
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1412 Symbol* class_name = ss.as_symbol(CHECK); |
6940
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|
1413 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
0 | 1414 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
1415 } | |
1416 } | |
1417 } | |
1418 | |
1419 | |
1420 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
1421 EXCEPTION_MARK; | |
1422 load_class_by_index(constant_pool, index, THREAD); | |
1423 if (HAS_PENDING_EXCEPTION) { | |
1424 // Exception happened during classloading. We ignore the exception here, since it | |
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8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
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|
1425 // is going to be rethrown since the current activation is going to be deoptimized and |
0 | 1426 // the interpreter will re-execute the bytecode. |
1427 CLEAR_PENDING_EXCEPTION; | |
14230
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
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12316
diff
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|
1428 // Class loading called java code which may have caused a stack |
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
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1429 // overflow. If the exception was thrown right before the return |
b9b6934ad75c
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|
1430 // to the runtime the stack is no longer guarded. Reguard the |
b9b6934ad75c
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1431 // stack otherwise if we return to the uncommon trap blob and the |
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1432 // stack bang causes a stack overflow we crash. |
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1433 assert(THREAD->is_Java_thread(), "only a java thread can be here"); |
b9b6934ad75c
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1434 JavaThread* thread = (JavaThread*)THREAD; |
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1435 bool guard_pages_enabled = thread->stack_yellow_zone_enabled(); |
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1436 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); |
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1437 assert(guard_pages_enabled, "stack banging in uncommon trap blob may cause crash"); |
0 | 1438 } |
1439 } | |
1440 | |
1441 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
1442 HandleMark hm; | |
1443 | |
1444 // uncommon_trap() is called at the beginning of the uncommon trap | |
1445 // handler. Note this fact before we start generating temporary frames | |
1446 // that can confuse an asynchronous stack walker. This counter is | |
1447 // decremented at the end of unpack_frames(). | |
1448 thread->inc_in_deopt_handler(); | |
1449 | |
1450 // We need to update the map if we have biased locking. | |
22298 | 1451 #if INCLUDE_JVMCI |
22551
71ea8d7db665
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Doug Simon <doug.simon@oracle.com>
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diff
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1452 // JVMCI might need to get an exception from the stack, which in turn requires the register map to be valid |
6428
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fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
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diff
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|
1453 RegisterMap reg_map(thread, true); |
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
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diff
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|
1454 #else |
0 | 1455 RegisterMap reg_map(thread, UseBiasedLocking); |
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diff
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|
1456 #endif |
0 | 1457 frame stub_frame = thread->last_frame(); |
1458 frame fr = stub_frame.sender(®_map); | |
1459 // Make sure the calling nmethod is not getting deoptimized and removed | |
1460 // before we are done with it. | |
1461 nmethodLocker nl(fr.pc()); | |
1462 | |
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1463 // Log a message |
10721
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Lukas Stadler <lukas.stadler@jku.at>
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10408
diff
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|
1464 Events::log(thread, "Uncommon trap: trap_request=" PTR32_FORMAT " fr.pc=" INTPTR_FORMAT " relative=" INTPTR_FORMAT, |
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1465 trap_request, fr.pc(), fr.pc() - fr.cb()->code_begin()); |
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1466 |
0 | 1467 { |
1468 ResourceMark rm; | |
1469 | |
1470 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
1471 revoke_biases_of_monitors(thread, fr, ®_map); | |
1472 | |
1473 DeoptReason reason = trap_request_reason(trap_request); | |
1474 DeoptAction action = trap_request_action(trap_request); | |
22298 | 1475 #if INCLUDE_JVMCI |
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Gilles Duboscq <duboscq@ssw.jku.at>
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diff
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1476 int debug_id = trap_request_debug_id(trap_request); |
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1477 #endif |
0 | 1478 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 |
1479 | |
1480 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
1481 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
1482 | |
1483 nmethod* nm = cvf->code(); | |
1484 | |
1485 ScopeDesc* trap_scope = cvf->scope(); | |
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1486 |
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1487 if (TraceDeoptimization) { |
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Add ttyLocker to TraceDeoptimization output
Tom Rodriguez <tom.rodriguez@oracle.com>
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1488 ttyLocker ttyl; |
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1489 tty->print_cr(" bci=%d pc=" INTPTR_FORMAT ", relative_pc=%d, method=%s" JVMCI_ONLY(", debug_id=%d"), trap_scope->bci(), fr.pc(), fr.pc() - nm->code_begin(), trap_scope->method()->name_and_sig_as_C_string() |
22298 | 1490 #if INCLUDE_JVMCI |
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1491 , debug_id |
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1492 #endif |
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diff
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1493 ); |
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1494 } |
0 | 1495 |
1496 methodHandle trap_method = trap_scope->method(); | |
1497 int trap_bci = trap_scope->bci(); | |
22298 | 1498 #if INCLUDE_JVMCI |
13641
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diff
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1499 oop speculation = thread->pending_failed_speculation(); |
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1500 if (nm->is_compiled_by_jvmci()) { |
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5e61ca976049
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1501 if (speculation != NULL) { |
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1502 oop speculation_log = nm->speculation_log(); |
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1503 if (speculation_log != NULL) { |
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documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1504 if (TraceDeoptimization || TraceUncollectedSpeculations) { |
22699
ea58bbafd5b9
Move SpeculationLog implementation to HotSpotSpeculationLog, because it is not useful for other VMs
Christian Wimmer <christian.wimmer@oracle.com>
parents:
22599
diff
changeset
|
1505 if (HotSpotSpeculationLog::lastFailed(speculation_log) != NULL) { |
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1506 tty->print_cr("A speculation that was not collected by the compiler is being overwritten"); |
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1507 } |
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1508 } |
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1509 if (TraceDeoptimization) { |
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1510 tty->print_cr("Saving speculation to speculation log"); |
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1511 } |
22699
ea58bbafd5b9
Move SpeculationLog implementation to HotSpotSpeculationLog, because it is not useful for other VMs
Christian Wimmer <christian.wimmer@oracle.com>
parents:
22599
diff
changeset
|
1512 HotSpotSpeculationLog::set_lastFailed(speculation_log, speculation); |
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1513 } else { |
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1514 if (TraceDeoptimization) { |
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1515 tty->print_cr("Speculation present but no speculation log"); |
13642
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1516 } |
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1517 } |
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1518 thread->set_pending_failed_speculation(NULL); |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1519 } else { |
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1520 if (TraceDeoptimization) { |
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1521 tty->print_cr("No speculation"); |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1522 } |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1523 } |
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1524 } else { |
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1525 assert(speculation == NULL, "There should not be a speculation for method compiled by non-JVMCI compilers"); |
13714
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1526 } |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1527 |
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1528 if (trap_bci == SynchronizationEntryBCI) { |
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1529 trap_bci = 0; |
22460
f27c163d7dc2
moved JVMCI fields from ThreadShadow to Thread
Doug Simon <doug.simon@oracle.com>
parents:
22441
diff
changeset
|
1530 thread->set_pending_monitorenter(true); |
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1531 } |
16535
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1532 |
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1533 if (reason == Deoptimization::Reason_transfer_to_interpreter) { |
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1534 thread->set_pending_transfer_to_interpreter(true); |
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1535 } |
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1536 #endif |
16535
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1537 |
2142 | 1538 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
0 | 1539 |
1540 // Record this event in the histogram. | |
1541 gather_statistics(reason, action, trap_bc); | |
1542 | |
1543 // Ensure that we can record deopt. history: | |
17780 | 1544 // Need MDO to record RTM code generation state. |
1545 bool create_if_missing = ProfileTraps RTM_OPT_ONLY( || UseRTMLocking ); | |
0 | 1546 |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1547 methodHandle profiled_method; |
22298 | 1548 #if INCLUDE_JVMCI |
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1549 if (nm->is_compiled_by_jvmci()) { |
9571
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1550 profiled_method = nm->method(); |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1551 } else { |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1552 profiled_method = trap_method; |
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1553 } |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
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diff
changeset
|
1554 #else |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1555 profiled_method = trap_method; |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1556 #endif |
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
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diff
changeset
|
1557 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
1558 MethodData* trap_mdo = |
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1559 get_method_data(thread, profiled_method, create_if_missing); |
0 | 1560 |
7193
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1561 // Log a message |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1562 Events::log_deopt_message(thread, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT " method=%s @ %d", |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1563 trap_reason_name(reason), trap_action_name(action), fr.pc(), |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1564 trap_method->name_and_sig_as_C_string(), trap_bci); |
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1565 |
0 | 1566 // Print a bunch of diagnostics, if requested. |
1567 if (TraceDeoptimization || LogCompilation) { | |
1568 ResourceMark rm; | |
1569 ttyLocker ttyl; | |
1570 char buf[100]; | |
1571 if (xtty != NULL) { | |
1572 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
1573 os::current_thread_id(), | |
1574 format_trap_request(buf, sizeof(buf), trap_request)); | |
1575 nm->log_identity(xtty); | |
1576 } | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1577 Symbol* class_name = NULL; |
0 | 1578 bool unresolved = false; |
1579 if (unloaded_class_index >= 0) { | |
1580 constantPoolHandle constants (THREAD, trap_method->constants()); | |
1581 if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1582 class_name = constants->klass_name_at(unloaded_class_index); |
0 | 1583 unresolved = true; |
1584 if (xtty != NULL) | |
1585 xtty->print(" unresolved='1'"); | |
1586 } else if (constants->tag_at(unloaded_class_index).is_symbol()) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1587 class_name = constants->symbol_at(unloaded_class_index); |
0 | 1588 } |
1589 if (xtty != NULL) | |
1590 xtty->name(class_name); | |
1591 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1592 if (xtty != NULL && trap_mdo != NULL) { |
0 | 1593 // Dump the relevant MDO state. |
1594 // This is the deopt count for the current reason, any previous | |
1595 // reasons or recompiles seen at this point. | |
1596 int dcnt = trap_mdo->trap_count(reason); | |
1597 if (dcnt != 0) | |
1598 xtty->print(" count='%d'", dcnt); | |
1599 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
1600 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
1601 if (dos != 0) { | |
1602 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
1603 if (trap_state_is_recompiled(dos)) { | |
1604 int recnt2 = trap_mdo->overflow_recompile_count(); | |
1605 if (recnt2 != 0) | |
1606 xtty->print(" recompiles2='%d'", recnt2); | |
1607 } | |
1608 } | |
1609 } | |
1610 if (xtty != NULL) { | |
1611 xtty->stamp(); | |
1612 xtty->end_head(); | |
1613 } | |
1614 if (TraceDeoptimization) { // make noise on the tty | |
1615 tty->print("Uncommon trap occurred in"); | |
1616 nm->method()->print_short_name(tty); | |
19961
71040f48cc34
TraceDeoptimization: print compiler and compile_id
Gilles Duboscq <gilles.m.duboscq@oracle.com>
parents:
19670
diff
changeset
|
1617 tty->print(" compiler=%s compile_id=%d", nm->compiler() == NULL ? "" : nm->compiler()->name(), nm->compile_id()); |
22298 | 1618 #if INCLUDE_JVMCI |
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1619 oop installedCode = nm->jvmci_installed_code(); |
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1620 if (installedCode != NULL) { |
15161
2c940b1a48d8
Convert InstalledCode from an interface into an abstract class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
15104
diff
changeset
|
1621 oop installedCodeName = NULL; |
16401
347915b8cea8
Move name from HotSpotNmethod to InstalledCode to have a name again for truffle nmethods.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
16025
diff
changeset
|
1622 if (installedCode->is_a(InstalledCode::klass())) { |
347915b8cea8
Move name from HotSpotNmethod to InstalledCode to have a name again for truffle nmethods.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
16025
diff
changeset
|
1623 installedCodeName = InstalledCode::name(installedCode); |
15161
2c940b1a48d8
Convert InstalledCode from an interface into an abstract class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
15104
diff
changeset
|
1624 } |
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1625 if (installedCodeName != NULL) { |
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1626 tty->print(" (JVMCI: installedCodeName=%s) ", java_lang_String::as_utf8_string(installedCodeName)); |
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1627 } else { |
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1628 tty->print(" (JVMCI: installed code has no name) "); |
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1629 } |
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1630 } else if (nm->is_compiled_by_jvmci()) { |
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1631 tty->print(" (JVMCI: no installed code) "); |
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1632 } |
22298 | 1633 #endif |
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1634 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d" JVMCI_ONLY(" debug_id=%d"), |
0 | 1635 fr.pc(), |
6843 | 1636 os::current_thread_id(), |
0 | 1637 trap_reason_name(reason), |
1638 trap_action_name(action), | |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1639 unloaded_class_index |
22298 | 1640 #if INCLUDE_JVMCI |
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1641 , debug_id |
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1642 #endif |
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1643 ); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1644 if (class_name != NULL) { |
0 | 1645 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
1646 class_name->print_symbol_on(tty); | |
1647 } | |
1648 tty->cr(); | |
1649 } | |
1650 if (xtty != NULL) { | |
1651 // Log the precise location of the trap. | |
1652 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
1653 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
1654 xtty->method(sd->method()); | |
1655 xtty->end_elem(); | |
1656 if (sd->is_top()) break; | |
1657 } | |
1658 xtty->tail("uncommon_trap"); | |
1659 } | |
1660 } | |
1661 // (End diagnostic printout.) | |
1662 | |
1663 // Load class if necessary | |
1664 if (unloaded_class_index >= 0) { | |
1665 constantPoolHandle constants(THREAD, trap_method->constants()); | |
1666 load_class_by_index(constants, unloaded_class_index); | |
1667 } | |
1668 | |
1669 // Flush the nmethod if necessary and desirable. | |
1670 // | |
1671 // We need to avoid situations where we are re-flushing the nmethod | |
1672 // because of a hot deoptimization site. Repeated flushes at the same | |
1673 // point need to be detected by the compiler and avoided. If the compiler | |
1674 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
1675 // module must take measures to avoid an infinite cycle of recompilation | |
1676 // and deoptimization. There are several such measures: | |
1677 // | |
1678 // 1. If a recompilation is ordered a second time at some site X | |
1679 // and for the same reason R, the action is adjusted to 'reinterpret', | |
1680 // to give the interpreter time to exercise the method more thoroughly. | |
1681 // If this happens, the method's overflow_recompile_count is incremented. | |
1682 // | |
1683 // 2. If the compiler fails to reduce the deoptimization rate, then | |
1684 // the method's overflow_recompile_count will begin to exceed the set | |
1685 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
1686 // is adjusted to 'make_not_compilable', and the method is abandoned | |
1687 // to the interpreter. This is a performance hit for hot methods, | |
1688 // but is better than a disastrous infinite cycle of recompilations. | |
1689 // (Actually, only the method containing the site X is abandoned.) | |
1690 // | |
1691 // 3. In parallel with the previous measures, if the total number of | |
1692 // recompilations of a method exceeds the much larger set limit | |
1693 // PerMethodRecompilationCutoff, the method is abandoned. | |
1694 // This should only happen if the method is very large and has | |
1695 // many "lukewarm" deoptimizations. The code which enforces this | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1696 // limit is elsewhere (class nmethod, class Method). |
0 | 1697 // |
1698 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
1699 // to recompile at each bytecode independently of the per-BCI cutoff. | |
1700 // | |
1701 // The decision to update code is up to the compiler, and is encoded | |
1702 // in the Action_xxx code. If the compiler requests Action_none | |
1703 // no trap state is changed, no compiled code is changed, and the | |
1704 // computation suffers along in the interpreter. | |
1705 // | |
1706 // The other action codes specify various tactics for decompilation | |
1707 // and recompilation. Action_maybe_recompile is the loosest, and | |
1708 // allows the compiled code to stay around until enough traps are seen, | |
1709 // and until the compiler gets around to recompiling the trapping method. | |
1710 // | |
1711 // The other actions cause immediate removal of the present code. | |
1712 | |
1713 bool update_trap_state = true; | |
1714 bool make_not_entrant = false; | |
1715 bool make_not_compilable = false; | |
1783 | 1716 bool reprofile = false; |
0 | 1717 switch (action) { |
1718 case Action_none: | |
1719 // Keep the old code. | |
1720 update_trap_state = false; | |
1721 break; | |
1722 case Action_maybe_recompile: | |
1723 // Do not need to invalidate the present code, but we can | |
1724 // initiate another | |
1725 // Start compiler without (necessarily) invalidating the nmethod. | |
1726 // The system will tolerate the old code, but new code should be | |
1727 // generated when possible. | |
1728 break; | |
1729 case Action_reinterpret: | |
1730 // Go back into the interpreter for a while, and then consider | |
1731 // recompiling form scratch. | |
1732 make_not_entrant = true; | |
1733 // Reset invocation counter for outer most method. | |
1734 // This will allow the interpreter to exercise the bytecodes | |
1735 // for a while before recompiling. | |
1736 // By contrast, Action_make_not_entrant is immediate. | |
1737 // | |
1738 // Note that the compiler will track null_check, null_assert, | |
1739 // range_check, and class_check events and log them as if they | |
1740 // had been traps taken from compiled code. This will update | |
1741 // the MDO trap history so that the next compilation will | |
1742 // properly detect hot trap sites. | |
1783 | 1743 reprofile = true; |
0 | 1744 break; |
1745 case Action_make_not_entrant: | |
1746 // Request immediate recompilation, and get rid of the old code. | |
1747 // Make them not entrant, so next time they are called they get | |
1748 // recompiled. Unloaded classes are loaded now so recompile before next | |
1749 // time they are called. Same for uninitialized. The interpreter will | |
1750 // link the missing class, if any. | |
1751 make_not_entrant = true; | |
1752 break; | |
1753 case Action_make_not_compilable: | |
1754 // Give up on compiling this method at all. | |
1755 make_not_entrant = true; | |
1756 make_not_compilable = true; | |
1757 break; | |
1758 default: | |
1759 ShouldNotReachHere(); | |
1760 } | |
1761 | |
1762 // Setting +ProfileTraps fixes the following, on all platforms: | |
1763 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
1764 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
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1765 // recompile relies on a MethodData* to record heroic opt failures. |
0 | 1766 |
1767 // Whether the interpreter is producing MDO data or not, we also need | |
1768 // to use the MDO to detect hot deoptimization points and control | |
1769 // aggressive optimization. | |
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1770 bool inc_recompile_count = false; |
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1771 ProfileData* pdata = NULL; |
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1772 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
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1773 assert(trap_mdo == get_method_data(thread, profiled_method, false), "sanity"); |
0 | 1774 uint this_trap_count = 0; |
1775 bool maybe_prior_trap = false; | |
1776 bool maybe_prior_recompile = false; | |
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1777 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
22298 | 1778 #if INCLUDE_JVMCI |
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1779 nm->is_compiled_by_jvmci() && nm->is_osr_method(), |
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1780 #endif |
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1781 nm->method(), |
0 | 1782 //outputs: |
1783 this_trap_count, | |
1784 maybe_prior_trap, | |
1785 maybe_prior_recompile); | |
1786 // Because the interpreter also counts null, div0, range, and class | |
1787 // checks, these traps from compiled code are double-counted. | |
1788 // This is harmless; it just means that the PerXTrapLimit values | |
1789 // are in effect a little smaller than they look. | |
1790 | |
1791 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
1792 if (per_bc_reason != Reason_none) { | |
1793 // Now take action based on the partially known per-BCI history. | |
1794 if (maybe_prior_trap | |
1795 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
1796 // If there are too many traps at this BCI, force a recompile. | |
1797 // This will allow the compiler to see the limit overflow, and | |
1798 // take corrective action, if possible. The compiler generally | |
1799 // does not use the exact PerBytecodeTrapLimit value, but instead | |
1800 // changes its tactics if it sees any traps at all. This provides | |
1801 // a little hysteresis, delaying a recompile until a trap happens | |
1802 // several times. | |
1803 // | |
1804 // Actually, since there is only one bit of counter per BCI, | |
1805 // the possible per-BCI counts are {0,1,(per-method count)}. | |
1806 // This produces accurate results if in fact there is only | |
1807 // one hot trap site, but begins to get fuzzy if there are | |
1808 // many sites. For example, if there are ten sites each | |
1809 // trapping two or more times, they each get the blame for | |
1810 // all of their traps. | |
1811 make_not_entrant = true; | |
1812 } | |
1813 | |
1814 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
1815 if (make_not_entrant && maybe_prior_recompile) { | |
1816 // More than one recompile at this point. | |
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1817 inc_recompile_count = maybe_prior_trap; |
0 | 1818 } |
1819 } else { | |
1820 // For reasons which are not recorded per-bytecode, we simply | |
1821 // force recompiles unconditionally. | |
1822 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
1823 make_not_entrant = true; | |
1824 } | |
1825 | |
1826 // Go back to the compiler if there are too many traps in this method. | |
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1827 if (this_trap_count >= per_method_trap_limit(reason)) { |
0 | 1828 // If there are too many traps in this method, force a recompile. |
1829 // This will allow the compiler to see the limit overflow, and | |
1830 // take corrective action, if possible. | |
1831 // (This condition is an unlikely backstop only, because the | |
1832 // PerBytecodeTrapLimit is more likely to take effect first, | |
1833 // if it is applicable.) | |
1834 make_not_entrant = true; | |
1835 } | |
1836 | |
1837 // Here's more hysteresis: If there has been a recompile at | |
1838 // this trap point already, run the method in the interpreter | |
1839 // for a while to exercise it more thoroughly. | |
1840 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
1783 | 1841 reprofile = true; |
0 | 1842 } |
1843 | |
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1844 } |
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1845 |
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1846 // Take requested actions on the method: |
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1847 |
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1848 // Recompile |
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1849 if (make_not_entrant) { |
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1850 if (!nm->make_not_entrant()) { |
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1851 return; // the call did not change nmethod's state |
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1852 } |
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1853 |
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1854 if (pdata != NULL) { |
0 | 1855 // Record the recompilation event, if any. |
1856 int tstate0 = pdata->trap_state(); | |
1857 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
1858 if (tstate1 != tstate0) | |
1859 pdata->set_trap_state(tstate1); | |
1860 } | |
17780 | 1861 |
1862 #if INCLUDE_RTM_OPT | |
1863 // Restart collecting RTM locking abort statistic if the method | |
1864 // is recompiled for a reason other than RTM state change. | |
1865 // Assume that in new recompiled code the statistic could be different, | |
1866 // for example, due to different inlining. | |
1867 if ((reason != Reason_rtm_state_change) && (trap_mdo != NULL) && | |
1868 UseRTMDeopt && (nm->rtm_state() != ProfileRTM)) { | |
1869 trap_mdo->atomic_set_rtm_state(ProfileRTM); | |
1870 } | |
1871 #endif | |
0 | 1872 } |
1873 | |
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1874 if (inc_recompile_count) { |
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1875 trap_mdo->inc_overflow_recompile_count(); |
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1876 if ((uint)trap_mdo->overflow_recompile_count() > |
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1877 (uint)PerBytecodeRecompilationCutoff) { |
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1878 // Give up on the method containing the bad BCI. |
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1879 if (trap_method() == nm->method()) { |
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1880 make_not_compilable = true; |
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1881 } else { |
7998 | 1882 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
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1883 // But give grace to the enclosing nm->method(). |
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1884 } |
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1885 } |
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1886 } |
0 | 1887 |
1783 | 1888 // Reprofile |
1889 if (reprofile) { | |
1890 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
0 | 1891 } |
1892 | |
1893 // Give up compiling | |
1783 | 1894 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
0 | 1895 assert(make_not_entrant, "consistent"); |
1783 | 1896 nm->method()->set_not_compilable(CompLevel_full_optimization); |
0 | 1897 } |
1898 | |
1899 } // Free marked resources | |
1900 | |
1901 } | |
1902 JRT_END | |
1903 | |
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1904 MethodData* |
0 | 1905 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
1906 bool create_if_missing) { | |
1907 Thread* THREAD = thread; | |
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1908 MethodData* mdo = m()->method_data(); |
0 | 1909 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
1910 // Build an MDO. Ignore errors like OutOfMemory; | |
1911 // that simply means we won't have an MDO to update. | |
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1912 Method::build_interpreter_method_data(m, THREAD); |
0 | 1913 if (HAS_PENDING_EXCEPTION) { |
1914 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
1915 CLEAR_PENDING_EXCEPTION; | |
1916 } | |
1917 mdo = m()->method_data(); | |
1918 } | |
1919 return mdo; | |
1920 } | |
1921 | |
1922 ProfileData* | |
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1923 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
0 | 1924 int trap_bci, |
1925 Deoptimization::DeoptReason reason, | |
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1926 bool update_total_trap_count, |
22298 | 1927 #if INCLUDE_JVMCI |
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1928 bool is_osr, |
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1929 #endif |
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1930 Method* compiled_method, |
0 | 1931 //outputs: |
1932 uint& ret_this_trap_count, | |
1933 bool& ret_maybe_prior_trap, | |
1934 bool& ret_maybe_prior_recompile) { | |
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1935 bool maybe_prior_trap = false; |
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1936 bool maybe_prior_recompile = false; |
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1937 uint this_trap_count = 0; |
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1938 if (update_total_trap_count) { |
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1939 uint idx = reason; |
22298 | 1940 #if INCLUDE_JVMCI |
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1941 if (is_osr) { |
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1942 idx += Reason_LIMIT; |
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1943 } |
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1944 #endif |
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1945 uint prior_trap_count = trap_mdo->trap_count(idx); |
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1946 this_trap_count = trap_mdo->inc_trap_count(idx); |
0 | 1947 |
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1948 // If the runtime cannot find a place to store trap history, |
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1949 // it is estimated based on the general condition of the method. |
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1950 // If the method has ever been recompiled, or has ever incurred |
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1951 // a trap with the present reason , then this BCI is assumed |
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1952 // (pessimistically) to be the culprit. |
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1953 maybe_prior_trap = (prior_trap_count != 0); |
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1954 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1955 } |
0 | 1956 ProfileData* pdata = NULL; |
1957 | |
1958 | |
1959 // For reasons which are recorded per bytecode, we check per-BCI data. | |
1960 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
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1961 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
0 | 1962 if (per_bc_reason != Reason_none) { |
1963 // Find the profile data for this BCI. If there isn't one, | |
1964 // try to allocate one from the MDO's set of spares. | |
1965 // This will let us detect a repeated trap at this point. | |
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1966 pdata = trap_mdo->allocate_bci_to_data(trap_bci, reason_is_speculate(reason) ? compiled_method : NULL); |
0 | 1967 |
1968 if (pdata != NULL) { | |
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1969 if (reason_is_speculate(reason) && !pdata->is_SpeculativeTrapData()) { |
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1970 if (LogCompilation && xtty != NULL) { |
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1971 ttyLocker ttyl; |
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1972 // no more room for speculative traps in this MDO |
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1973 xtty->elem("speculative_traps_oom"); |
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1974 } |
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1975 } |
0 | 1976 // Query the trap state of this profile datum. |
1977 int tstate0 = pdata->trap_state(); | |
1978 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
1979 maybe_prior_trap = false; | |
1980 if (!trap_state_is_recompiled(tstate0)) | |
1981 maybe_prior_recompile = false; | |
1982 | |
1983 // Update the trap state of this profile datum. | |
1984 int tstate1 = tstate0; | |
1985 // Record the reason. | |
1986 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
1987 // Store the updated state on the MDO, for next time. | |
1988 if (tstate1 != tstate0) | |
1989 pdata->set_trap_state(tstate1); | |
1990 } else { | |
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1991 if (LogCompilation && xtty != NULL) { |
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1992 ttyLocker ttyl; |
0 | 1993 // Missing MDP? Leave a small complaint in the log. |
1994 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1995 } |
0 | 1996 } |
1997 } | |
1998 | |
1999 // Return results: | |
2000 ret_this_trap_count = this_trap_count; | |
2001 ret_maybe_prior_trap = maybe_prior_trap; | |
2002 ret_maybe_prior_recompile = maybe_prior_recompile; | |
2003 return pdata; | |
2004 } | |
2005 | |
2006 void | |
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2007 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 2008 ResourceMark rm; |
2009 // Ignored outputs: | |
2010 uint ignore_this_trap_count; | |
2011 bool ignore_maybe_prior_trap; | |
2012 bool ignore_maybe_prior_recompile; | |
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2013 assert(!reason_is_speculate(reason), "reason speculate only used by compiler"); |
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2014 // JVMCI uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
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2015 bool update_total_counts = JVMCI_ONLY(false) NOT_JVMCI(true); |
0 | 2016 query_update_method_data(trap_mdo, trap_bci, |
2017 (DeoptReason)reason, | |
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2018 update_total_counts, |
22298 | 2019 #if INCLUDE_JVMCI |
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2020 false, |
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2021 #endif |
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2022 NULL, |
0 | 2023 ignore_this_trap_count, |
2024 ignore_maybe_prior_trap, | |
2025 ignore_maybe_prior_recompile); | |
2026 } | |
2027 | |
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Let fetch_unroll_info override the exec_mode and handle rethrowing scopes
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2028 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request, jint exec_mode) { |
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2029 if (TraceDeoptimization) { |
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2030 tty->print("Uncommon trap "); |
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2031 } |
0 | 2032 // Still in Java no safepoints |
2033 { | |
2034 // This enters VM and may safepoint | |
2035 uncommon_trap_inner(thread, trap_request); | |
2036 } | |
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2037 return fetch_unroll_info_helper(thread, exec_mode); |
0 | 2038 } |
2039 | |
2040 // Local derived constants. | |
2041 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
2042 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
2043 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
2044 | |
2045 //---------------------------trap_state_reason--------------------------------- | |
2046 Deoptimization::DeoptReason | |
2047 Deoptimization::trap_state_reason(int trap_state) { | |
2048 // This assert provides the link between the width of DataLayout::trap_bits | |
2049 // and the encoding of "recorded" reasons. It ensures there are enough | |
2050 // bits to store all needed reasons in the per-BCI MDO profile. | |
2051 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
2052 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
2053 trap_state -= recompile_bit; | |
2054 if (trap_state == DS_REASON_MASK) { | |
2055 return Reason_many; | |
2056 } else { | |
2057 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
2058 return (DeoptReason)trap_state; | |
2059 } | |
2060 } | |
2061 //-------------------------trap_state_has_reason------------------------------- | |
2062 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
2063 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
2064 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
2065 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
2066 trap_state -= recompile_bit; | |
2067 if (trap_state == DS_REASON_MASK) { | |
2068 return -1; // true, unspecifically (bottom of state lattice) | |
2069 } else if (trap_state == reason) { | |
2070 return 1; // true, definitely | |
2071 } else if (trap_state == 0) { | |
2072 return 0; // false, definitely (top of state lattice) | |
2073 } else { | |
2074 return 0; // false, definitely | |
2075 } | |
2076 } | |
2077 //-------------------------trap_state_add_reason------------------------------- | |
2078 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
2079 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
2080 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
2081 trap_state -= recompile_bit; | |
2082 if (trap_state == DS_REASON_MASK) { | |
2083 return trap_state + recompile_bit; // already at state lattice bottom | |
2084 } else if (trap_state == reason) { | |
2085 return trap_state + recompile_bit; // the condition is already true | |
2086 } else if (trap_state == 0) { | |
2087 return reason + recompile_bit; // no condition has yet been true | |
2088 } else { | |
2089 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
2090 } | |
2091 } | |
2092 //-----------------------trap_state_is_recompiled------------------------------ | |
2093 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
2094 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
2095 } | |
2096 //-----------------------trap_state_set_recompiled----------------------------- | |
2097 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
2098 if (z) return trap_state | DS_RECOMPILE_BIT; | |
2099 else return trap_state & ~DS_RECOMPILE_BIT; | |
2100 } | |
2101 //---------------------------format_trap_state--------------------------------- | |
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2102 // This is used for debugging and diagnostics, including LogFile output. |
0 | 2103 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
2104 int trap_state) { | |
2105 DeoptReason reason = trap_state_reason(trap_state); | |
2106 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
2107 // Re-encode the state from its decoded components. | |
2108 int decoded_state = 0; | |
2109 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
2110 decoded_state = trap_state_add_reason(decoded_state, reason); | |
2111 if (recomp_flag) | |
2112 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
2113 // If the state re-encodes properly, format it symbolically. | |
2114 // Because this routine is used for debugging and diagnostics, | |
2115 // be robust even if the state is a strange value. | |
2116 size_t len; | |
2117 if (decoded_state != trap_state) { | |
2118 // Random buggy state that doesn't decode?? | |
2119 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
2120 } else { | |
2121 len = jio_snprintf(buf, buflen, "%s%s", | |
2122 trap_reason_name(reason), | |
2123 recomp_flag ? " recompiled" : ""); | |
2124 } | |
2125 if (len >= buflen) | |
2126 buf[buflen-1] = '\0'; | |
2127 return buf; | |
2128 } | |
2129 | |
2130 | |
2131 //--------------------------------statics-------------------------------------- | |
2132 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
2133 = Deoptimization::Action_reinterpret; | |
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2134 const char* Deoptimization::_trap_reason_name[] = { |
0 | 2135 // Note: Keep this in sync. with enum DeoptReason. |
2136 "none", | |
2137 "null_check", | |
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2138 "null_assert" JVMCI_ONLY("_or_unreached0"), |
0 | 2139 "range_check", |
2140 "class_check", | |
2141 "array_check", | |
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2142 "intrinsic" JVMCI_ONLY("_or_type_checked_inlining"), |
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2143 "bimorphic" JVMCI_ONLY("_or_optimized_type_check"), |
0 | 2144 "unloaded", |
2145 "uninitialized", | |
2146 "unreached", | |
2147 "unhandled", | |
2148 "constraint", | |
2149 "div0_check", | |
1172 | 2150 "age", |
3345 | 2151 "predicate", |
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2152 "loop_limit_check", |
17780 | 2153 "speculate_class_check", |
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2154 "rtm_state_change", |
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2155 "unstable_if", |
22298 | 2156 #if INCLUDE_JVMCI |
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2157 "aliasing", |
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2158 "transfer_to_interpreter", |
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2159 "not_compiled_exception_handler", |
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2160 "unresolved", |
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2161 "jsr_mismatch" |
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2162 #endif |
0 | 2163 }; |
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2164 const char* Deoptimization::_trap_action_name[] = { |
0 | 2165 // Note: Keep this in sync. with enum DeoptAction. |
2166 "none", | |
2167 "maybe_recompile", | |
2168 "reinterpret", | |
2169 "make_not_entrant", | |
2170 "make_not_compilable" | |
2171 }; | |
2172 | |
2173 const char* Deoptimization::trap_reason_name(int reason) { | |
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2174 // Check that every reason has a name |
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2175 STATIC_ASSERT(sizeof(_trap_reason_name)/sizeof(const char*) == Reason_LIMIT); |
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2176 |
0 | 2177 if (reason == Reason_many) return "many"; |
2178 if ((uint)reason < Reason_LIMIT) | |
2179 return _trap_reason_name[reason]; | |
2180 static char buf[20]; | |
2181 sprintf(buf, "reason%d", reason); | |
2182 return buf; | |
2183 } | |
2184 const char* Deoptimization::trap_action_name(int action) { | |
22709
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2185 // Check that every action has a name |
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2186 STATIC_ASSERT(sizeof(_trap_action_name)/sizeof(const char*) == Action_LIMIT); |
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2187 |
0 | 2188 if ((uint)action < Action_LIMIT) |
2189 return _trap_action_name[action]; | |
2190 static char buf[20]; | |
2191 sprintf(buf, "action%d", action); | |
2192 return buf; | |
2193 } | |
2194 | |
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2195 // This is used for debugging and diagnostics, including LogFile output. |
0 | 2196 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, |
2197 int trap_request) { | |
2198 jint unloaded_class_index = trap_request_index(trap_request); | |
2199 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
2200 const char* action = trap_action_name(trap_request_action(trap_request)); | |
22298 | 2201 #if INCLUDE_JVMCI |
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2202 int debug_id = trap_request_debug_id(trap_request); |
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2203 #endif |
0 | 2204 size_t len; |
2205 if (unloaded_class_index < 0) { | |
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2206 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" JVMCI_ONLY(" debug_id='%d'"), |
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2207 reason, action |
22298 | 2208 #if INCLUDE_JVMCI |
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2209 ,debug_id |
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2210 #endif |
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2211 ); |
0 | 2212 } else { |
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2213 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" JVMCI_ONLY(" debug_id='%d'"), |
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2214 reason, action, unloaded_class_index |
22298 | 2215 #if INCLUDE_JVMCI |
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2216 ,debug_id |
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2217 #endif |
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2218 ); |
0 | 2219 } |
2220 if (len >= buflen) | |
2221 buf[buflen-1] = '\0'; | |
2222 return buf; | |
2223 } | |
2224 | |
2225 juint Deoptimization::_deoptimization_hist | |
2226 [Deoptimization::Reason_LIMIT] | |
2227 [1 + Deoptimization::Action_LIMIT] | |
2228 [Deoptimization::BC_CASE_LIMIT] | |
2229 = {0}; | |
2230 | |
2231 enum { | |
2232 LSB_BITS = 8, | |
2233 LSB_MASK = right_n_bits(LSB_BITS) | |
2234 }; | |
2235 | |
2236 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2237 Bytecodes::Code bc) { | |
2238 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2239 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
2240 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
2241 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
2242 juint* cases = _deoptimization_hist[reason][1+action]; | |
2243 juint* bc_counter_addr = NULL; | |
2244 juint bc_counter = 0; | |
2245 // Look for an unused counter, or an exact match to this BC. | |
2246 if (bc != Bytecodes::_illegal) { | |
2247 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2248 juint* counter_addr = &cases[bc_case]; | |
2249 juint counter = *counter_addr; | |
2250 if ((counter == 0 && bc_counter_addr == NULL) | |
2251 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
2252 // this counter is either free or is already devoted to this BC | |
2253 bc_counter_addr = counter_addr; | |
2254 bc_counter = counter | bc; | |
2255 } | |
2256 } | |
2257 } | |
2258 if (bc_counter_addr == NULL) { | |
2259 // Overflow, or no given bytecode. | |
2260 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
2261 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
2262 } | |
2263 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
2264 } | |
2265 | |
2266 jint Deoptimization::total_deoptimization_count() { | |
2267 return _deoptimization_hist[Reason_none][0][0]; | |
2268 } | |
2269 | |
2270 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
2271 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
2272 return _deoptimization_hist[reason][0][0]; | |
2273 } | |
2274 | |
2275 void Deoptimization::print_statistics() { | |
2276 juint total = total_deoptimization_count(); | |
2277 juint account = total; | |
2278 if (total != 0) { | |
2279 ttyLocker ttyl; | |
2280 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
2281 tty->print_cr("Deoptimization traps recorded:"); | |
2282 #define PRINT_STAT_LINE(name, r) \ | |
2283 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
2284 PRINT_STAT_LINE("total", total); | |
2285 // For each non-zero entry in the histogram, print the reason, | |
2286 // the action, and (if specifically known) the type of bytecode. | |
2287 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
2288 for (int action = 0; action < Action_LIMIT; action++) { | |
2289 juint* cases = _deoptimization_hist[reason][1+action]; | |
2290 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
2291 juint counter = cases[bc_case]; | |
2292 if (counter != 0) { | |
2293 char name[1*K]; | |
2294 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
2295 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
2296 bc = Bytecodes::_illegal; | |
2297 sprintf(name, "%s/%s/%s", | |
2298 trap_reason_name(reason), | |
2299 trap_action_name(action), | |
2300 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
2301 juint r = counter >> LSB_BITS; | |
2302 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
2303 account -= r; | |
2304 } | |
2305 } | |
2306 } | |
2307 } | |
2308 if (account != 0) { | |
2309 PRINT_STAT_LINE("unaccounted", account); | |
2310 } | |
2311 #undef PRINT_STAT_LINE | |
2312 if (xtty != NULL) xtty->tail("statistics"); | |
2313 } | |
2314 } | |
22298 | 2315 #else // COMPILER2 || SHARK || INCLUDE_JVMCI |
0 | 2316 |
2317 | |
2318 // Stubs for C1 only system. | |
2319 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
2320 return false; | |
2321 } | |
2322 | |
2323 const char* Deoptimization::trap_reason_name(int reason) { | |
2324 return "unknown"; | |
2325 } | |
2326 | |
2327 void Deoptimization::print_statistics() { | |
2328 // no output | |
2329 } | |
2330 | |
2331 void | |
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2332 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
0 | 2333 // no udpate |
2334 } | |
2335 | |
2336 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
2337 return 0; | |
2338 } | |
2339 | |
2340 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
2341 Bytecodes::Code bc) { | |
2342 // no update | |
2343 } | |
2344 | |
2345 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
2346 int trap_state) { | |
2347 jio_snprintf(buf, buflen, "#%d", trap_state); | |
2348 return buf; | |
2349 } | |
2350 | |
22298 | 2351 #endif // COMPILER2 || SHARK || INCLUDE_JVMCI |