Mercurial > hg > truffle
annotate src/share/vm/runtime/deoptimization.cpp @ 18229:e04712c8928a
Merge
| author | Tom Rodriguez <tom.rodriguez@oracle.com> |
|---|---|
| date | Mon, 03 Nov 2014 10:31:39 -0800 |
| parents | 40074f6ac788 17c98fad6980 |
| children | 3ad5d7a6adb5 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "code/debugInfoRec.hpp" | |
| 28 #include "code/nmethod.hpp" | |
| 29 #include "code/pcDesc.hpp" | |
| 30 #include "code/scopeDesc.hpp" | |
| 31 #include "interpreter/bytecode.hpp" | |
| 32 #include "interpreter/interpreter.hpp" | |
| 33 #include "interpreter/oopMapCache.hpp" | |
| 34 #include "memory/allocation.inline.hpp" | |
| 35 #include "memory/oopFactory.hpp" | |
| 36 #include "memory/resourceArea.hpp" | |
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37 #include "oops/method.hpp" |
| 1972 | 38 #include "oops/oop.inline.hpp" |
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39 #include "oops/fieldStreams.hpp" |
| 1972 | 40 #include "prims/jvmtiThreadState.hpp" |
| 41 #include "runtime/biasedLocking.hpp" | |
| 42 #include "runtime/compilationPolicy.hpp" | |
| 43 #include "runtime/deoptimization.hpp" | |
| 44 #include "runtime/interfaceSupport.hpp" | |
| 45 #include "runtime/sharedRuntime.hpp" | |
| 46 #include "runtime/signature.hpp" | |
| 47 #include "runtime/stubRoutines.hpp" | |
| 48 #include "runtime/thread.hpp" | |
| 49 #include "runtime/vframe.hpp" | |
| 50 #include "runtime/vframeArray.hpp" | |
| 51 #include "runtime/vframe_hp.hpp" | |
| 52 #include "utilities/events.hpp" | |
| 53 #include "utilities/xmlstream.hpp" | |
| 54 #ifdef TARGET_ARCH_x86 | |
| 55 # include "vmreg_x86.inline.hpp" | |
| 56 #endif | |
| 57 #ifdef TARGET_ARCH_sparc | |
| 58 # include "vmreg_sparc.inline.hpp" | |
| 59 #endif | |
| 60 #ifdef TARGET_ARCH_zero | |
| 61 # include "vmreg_zero.inline.hpp" | |
| 62 #endif | |
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63 #ifdef TARGET_ARCH_arm |
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64 # include "vmreg_arm.inline.hpp" |
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65 #endif |
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66 #ifdef TARGET_ARCH_ppc |
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67 # include "vmreg_ppc.inline.hpp" |
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68 #endif |
| 1972 | 69 #ifdef COMPILER2 |
| 70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
| 71 # include "adfiles/ad_x86_32.hpp" | |
| 72 #endif | |
| 73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
| 74 # include "adfiles/ad_x86_64.hpp" | |
| 75 #endif | |
| 76 #ifdef TARGET_ARCH_MODEL_sparc | |
| 77 # include "adfiles/ad_sparc.hpp" | |
| 78 #endif | |
| 79 #ifdef TARGET_ARCH_MODEL_zero | |
| 80 # include "adfiles/ad_zero.hpp" | |
| 81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
| 14391 | 85 #ifdef TARGET_ARCH_MODEL_ppc_32 |
| 86 # include "adfiles/ad_ppc_32.hpp" | |
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87 #endif |
| 14391 | 88 #ifdef TARGET_ARCH_MODEL_ppc_64 |
| 89 # include "adfiles/ad_ppc_64.hpp" | |
| 1972 | 90 #endif |
| 14391 | 91 #endif // COMPILER2 |
| 0 | 92 |
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93 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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94 |
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95 #ifdef GRAAL |
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96 #include "graal/graalRuntime.hpp" |
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97 #include "graal/graalJavaAccess.hpp" |
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98 #endif |
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99 |
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100 |
| 0 | 101 bool DeoptimizationMarker::_is_active = false; |
| 102 | |
| 103 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
| 104 int caller_adjustment, | |
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105 int caller_actual_parameters, |
| 0 | 106 int number_of_frames, |
| 107 intptr_t* frame_sizes, | |
| 108 address* frame_pcs, | |
| 109 BasicType return_type) { | |
| 110 _size_of_deoptimized_frame = size_of_deoptimized_frame; | |
| 111 _caller_adjustment = caller_adjustment; | |
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112 _caller_actual_parameters = caller_actual_parameters; |
| 0 | 113 _number_of_frames = number_of_frames; |
| 114 _frame_sizes = frame_sizes; | |
| 115 _frame_pcs = frame_pcs; | |
| 6197 | 116 _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler); |
| 0 | 117 _return_type = return_type; |
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118 _initial_info = 0; |
| 0 | 119 // PD (x86 only) |
| 120 _counter_temp = 0; | |
| 121 _unpack_kind = 0; | |
| 122 _sender_sp_temp = 0; | |
| 123 | |
| 124 _total_frame_sizes = size_of_frames(); | |
| 125 } | |
| 126 | |
| 127 | |
| 128 Deoptimization::UnrollBlock::~UnrollBlock() { | |
| 6197 | 129 FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes, mtCompiler); |
| 130 FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs, mtCompiler); | |
| 131 FREE_C_HEAP_ARRAY(intptr_t, _register_block, mtCompiler); | |
| 0 | 132 } |
| 133 | |
| 134 | |
| 135 intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { | |
| 136 assert(register_number < RegisterMap::reg_count, "checking register number"); | |
| 137 return &_register_block[register_number * 2]; | |
| 138 } | |
| 139 | |
| 140 | |
| 141 | |
| 142 int Deoptimization::UnrollBlock::size_of_frames() const { | |
| 143 // Acount first for the adjustment of the initial frame | |
| 144 int result = _caller_adjustment; | |
| 145 for (int index = 0; index < number_of_frames(); index++) { | |
| 146 result += frame_sizes()[index]; | |
| 147 } | |
| 148 return result; | |
| 149 } | |
| 150 | |
| 151 | |
| 152 void Deoptimization::UnrollBlock::print() { | |
| 153 ttyLocker ttyl; | |
| 154 tty->print_cr("UnrollBlock"); | |
| 155 tty->print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); | |
| 156 tty->print( " frame_sizes: "); | |
| 157 for (int index = 0; index < number_of_frames(); index++) { | |
| 158 tty->print("%d ", frame_sizes()[index]); | |
| 159 } | |
| 160 tty->cr(); | |
| 161 } | |
| 162 | |
| 163 | |
| 164 // In order to make fetch_unroll_info work properly with escape | |
| 165 // analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and | |
| 166 // ResetNoHandleMark and HandleMark were removed from it. The actual reallocation | |
| 167 // of previously eliminated objects occurs in realloc_objects, which is | |
| 168 // called from the method fetch_unroll_info_helper below. | |
| 169 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread)) | |
| 170 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
| 171 // but makes the entry a little slower. There is however a little dance we have to | |
| 172 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
| 173 | |
| 174 // fetch_unroll_info() is called at the beginning of the deoptimization | |
| 175 // handler. Note this fact before we start generating temporary frames | |
| 176 // that can confuse an asynchronous stack walker. This counter is | |
| 177 // decremented at the end of unpack_frames(). | |
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178 if (TraceDeoptimization) { |
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179 tty->print_cr("Deoptimizing thread " INTPTR_FORMAT, thread); |
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180 } |
| 0 | 181 thread->inc_in_deopt_handler(); |
| 182 | |
| 183 return fetch_unroll_info_helper(thread); | |
| 184 JRT_END | |
| 185 | |
| 186 | |
| 187 // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) | |
| 188 Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread) { | |
| 189 | |
| 190 // Note: there is a safepoint safety issue here. No matter whether we enter | |
| 191 // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once | |
| 192 // the vframeArray is created. | |
| 193 // | |
| 194 | |
| 195 // Allocate our special deoptimization ResourceMark | |
| 196 DeoptResourceMark* dmark = new DeoptResourceMark(thread); | |
| 197 assert(thread->deopt_mark() == NULL, "Pending deopt!"); | |
| 198 thread->set_deopt_mark(dmark); | |
| 199 | |
| 200 frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect | |
| 201 RegisterMap map(thread, true); | |
| 202 RegisterMap dummy_map(thread, false); | |
| 203 // Now get the deoptee with a valid map | |
| 204 frame deoptee = stub_frame.sender(&map); | |
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205 // Set the deoptee nmethod |
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206 assert(thread->deopt_nmethod() == NULL, "Pending deopt!"); |
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207 thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null()); |
| 0 | 208 |
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209 if (VerifyStack) { |
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210 thread->validate_frame_layout(); |
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211 } |
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212 |
| 0 | 213 // Create a growable array of VFrames where each VFrame represents an inlined |
| 214 // Java frame. This storage is allocated with the usual system arena. | |
| 215 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
| 216 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); | |
| 217 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
| 218 while (!vf->is_top()) { | |
| 219 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
| 220 chunk->push(compiledVFrame::cast(vf)); | |
| 221 vf = vf->sender(); | |
| 222 } | |
| 223 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
| 224 chunk->push(compiledVFrame::cast(vf)); | |
| 225 | |
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226 #if defined(COMPILER2) || defined(GRAAL) |
| 0 | 227 // Reallocate the non-escaping objects and restore their fields. Then |
| 228 // relock objects if synchronization on them was eliminated. | |
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229 #ifdef COMPILER2 |
| 4777 | 230 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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231 if (EliminateAllocations) { |
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232 #endif // COMPILER2 |
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233 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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234 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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235 |
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236 // The flag return_oop() indicates call sites which return oop |
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237 // in compiled code. Such sites include java method calls, |
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238 // runtime calls (for example, used to allocate new objects/arrays |
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239 // on slow code path) and any other calls generated in compiled code. |
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240 // It is not guaranteed that we can get such information here only |
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241 // by analyzing bytecode in deoptimized frames. This is why this flag |
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242 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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243 bool save_oop_result = chunk->at(0)->scope()->return_oop(); |
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244 Handle return_value; |
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245 if (save_oop_result) { |
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246 // Reallocation may trigger GC. If deoptimization happened on return from |
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247 // call which returns oop we need to save it since it is not in oopmap. |
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248 oop result = deoptee.saved_oop_result(&map); |
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249 assert(result == NULL || result->is_oop(), "must be oop"); |
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250 return_value = Handle(thread, result); |
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251 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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252 if (TraceDeoptimization) { |
| 6843 | 253 ttyLocker ttyl; |
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254 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, (void *)result, thread); |
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255 } |
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256 } |
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257 bool reallocated = false; |
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258 if (objects != NULL) { |
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259 JRT_BLOCK |
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260 reallocated = realloc_objects(thread, &deoptee, objects, THREAD); |
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261 JRT_END |
| 0 | 262 } |
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263 if (reallocated) { |
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264 reassign_fields(&deoptee, &map, objects); |
| 0 | 265 #ifndef PRODUCT |
| 266 if (TraceDeoptimization) { | |
| 267 ttyLocker ttyl; | |
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268 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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269 print_objects(objects); |
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270 } |
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271 #endif |
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272 } |
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273 if (save_oop_result) { |
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274 // Restore result. |
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275 deoptee.set_saved_oop_result(&map, return_value()); |
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276 } |
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277 #ifdef COMPILER2 |
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278 } |
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279 if (EliminateLocks) { |
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280 #endif // COMPILER2 |
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281 #ifndef PRODUCT |
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282 bool first = true; |
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283 #endif |
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284 for (int i = 0; i < chunk->length(); i++) { |
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285 compiledVFrame* cvf = chunk->at(i); |
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286 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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287 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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288 if (monitors->is_nonempty()) { |
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289 relock_objects(monitors, thread); |
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290 #ifndef PRODUCT |
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291 if (PrintDeoptimizationDetails) { |
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292 ttyLocker ttyl; |
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293 for (int j = 0; j < monitors->length(); j++) { |
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294 MonitorInfo* mi = monitors->at(j); |
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295 if (mi->eliminated()) { |
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296 if (first) { |
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297 first = false; |
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298 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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299 } |
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300 tty->print_cr(" object <" INTPTR_FORMAT "> locked", (void *)mi->owner()); |
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301 } |
| 0 | 302 } |
| 303 } | |
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304 #endif // !PRODUCT |
| 0 | 305 } |
| 306 } | |
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307 #ifdef COMPILER2 |
| 0 | 308 } |
| 309 } | |
| 310 #endif // COMPILER2 | |
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311 #endif // COMPILER2 || GRAAL |
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312 |
| 0 | 313 // Ensure that no safepoint is taken after pointers have been stored |
| 314 // in fields of rematerialized objects. If a safepoint occurs from here on | |
| 315 // out the java state residing in the vframeArray will be missed. | |
| 316 No_Safepoint_Verifier no_safepoint; | |
| 317 | |
| 318 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk); | |
| 319 | |
| 320 assert(thread->vframe_array_head() == NULL, "Pending deopt!");; | |
| 321 thread->set_vframe_array_head(array); | |
| 322 | |
| 323 // Now that the vframeArray has been created if we have any deferred local writes | |
| 324 // added by jvmti then we can free up that structure as the data is now in the | |
| 325 // vframeArray | |
| 326 | |
| 327 if (thread->deferred_locals() != NULL) { | |
| 328 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
| 329 int i = 0; | |
| 330 do { | |
| 331 // Because of inlining we could have multiple vframes for a single frame | |
| 332 // and several of the vframes could have deferred writes. Find them all. | |
| 333 if (list->at(i)->id() == array->original().id()) { | |
| 334 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
| 335 list->remove_at(i); | |
| 336 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
| 337 delete dlv; | |
| 338 } else { | |
| 339 i++; | |
| 340 } | |
| 341 } while ( i < list->length() ); | |
| 342 if (list->length() == 0) { | |
| 343 thread->set_deferred_locals(NULL); | |
| 344 // free the list and elements back to C heap. | |
| 345 delete list; | |
| 346 } | |
| 347 | |
| 348 } | |
| 349 | |
| 1692 | 350 #ifndef SHARK |
| 0 | 351 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
| 352 CodeBlob* cb = stub_frame.cb(); | |
| 353 // Verify we have the right vframeArray | |
| 354 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
| 355 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
| 356 | |
| 1204 | 357 // If the deopt call site is a MethodHandle invoke call site we have |
| 358 // to adjust the unpack_sp. | |
| 359 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
| 360 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
| 361 unpack_sp = deoptee.unextended_sp(); | |
| 362 | |
| 0 | 363 #ifdef ASSERT |
| 15104 | 364 assert(cb->is_deoptimization_stub() || |
| 365 cb->is_uncommon_trap_stub() || | |
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366 strcmp("Stub<DeoptimizationStub.deoptimizationHandler>", cb->name()) == 0 || |
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367 strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>", cb->name()) == 0, |
| 15104 | 368 err_msg("unexpected code blob: %s", cb->name())); |
| 0 | 369 #endif |
| 1692 | 370 #else |
| 371 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
| 372 #endif // !SHARK | |
| 373 | |
| 0 | 374 // This is a guarantee instead of an assert because if vframe doesn't match |
| 375 // we will unpack the wrong deoptimized frame and wind up in strange places | |
| 376 // where it will be very difficult to figure out what went wrong. Better | |
| 377 // to die an early death here than some very obscure death later when the | |
| 378 // trail is cold. | |
| 379 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
| 380 // in that it will fail to detect a problem when there is one. This needs | |
| 381 // more work in tiger timeframe. | |
| 382 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
| 383 | |
| 384 int number_of_frames = array->frames(); | |
| 385 | |
| 386 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
| 387 // virtual activation, which is the reverse of the elements in the vframes array. | |
| 6197 | 388 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
| 0 | 389 // +1 because we always have an interpreter return address for the final slot. |
| 6197 | 390 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
| 0 | 391 int popframe_extra_args = 0; |
| 392 // Create an interpreter return address for the stub to use as its return | |
| 393 // address so the skeletal frames are perfectly walkable | |
| 394 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
| 395 | |
| 396 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
| 397 // activation be put back on the expression stack of the caller for reexecution | |
| 398 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
| 399 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
| 400 } | |
| 401 | |
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402 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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403 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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404 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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405 // |
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406 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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407 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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408 |
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409 // It's possible that the number of paramters at the call site is |
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410 // different than number of arguments in the callee when method |
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411 // handles are used. If the caller is interpreted get the real |
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412 // value so that the proper amount of space can be added to it's |
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413 // frame. |
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414 bool caller_was_method_handle = false; |
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415 if (deopt_sender.is_interpreted_frame()) { |
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416 methodHandle method = deopt_sender.interpreter_frame_method(); |
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417 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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418 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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419 // Method handle invokes may involve fairly arbitrary chains of |
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420 // calls so it's impossible to know how much actual space the |
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421 // caller has for locals. |
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422 caller_was_method_handle = true; |
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423 } |
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424 } |
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425 |
| 0 | 426 // |
| 427 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
| 428 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
| 429 // frame_sizes/frame_pcs[n] youngest frame (int) | |
| 430 // | |
| 431 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
| 432 // owns the space for the return address to it's caller). Confusing ain't it. | |
| 433 // | |
| 434 // The vframe array can address vframes with indices running from | |
| 435 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
| 436 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
| 437 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
| 438 // so things look a little strange in this loop. | |
| 439 // | |
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440 int callee_parameters = 0; |
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441 int callee_locals = 0; |
| 0 | 442 for (int index = 0; index < array->frames(); index++ ) { |
| 443 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
| 444 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
| 445 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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446 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(callee_parameters, |
| 0 | 447 callee_locals, |
| 448 index == 0, | |
| 449 popframe_extra_args); | |
| 450 // This pc doesn't have to be perfect just good enough to identify the frame | |
| 451 // as interpreted so the skeleton frame will be walkable | |
| 452 // The correct pc will be set when the skeleton frame is completely filled out | |
| 453 // The final pc we store in the loop is wrong and will be overwritten below | |
| 454 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
| 455 | |
| 456 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
| 457 callee_locals = array->element(index)->method()->max_locals(); | |
| 458 popframe_extra_args = 0; | |
| 459 } | |
| 460 | |
| 461 // Compute whether the root vframe returns a float or double value. | |
| 462 BasicType return_type; | |
| 463 { | |
| 464 HandleMark hm; | |
| 465 methodHandle method(thread, array->element(0)->method()); | |
| 2142 | 466 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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467 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
| 0 | 468 } |
| 469 | |
| 470 // Compute information for handling adapters and adjusting the frame size of the caller. | |
| 471 int caller_adjustment = 0; | |
| 472 | |
| 473 // Compute the amount the oldest interpreter frame will have to adjust | |
| 474 // its caller's stack by. If the caller is a compiled frame then | |
| 475 // we pretend that the callee has no parameters so that the | |
| 476 // extension counts for the full amount of locals and not just | |
| 477 // locals-parms. This is because without a c2i adapter the parm | |
| 478 // area as created by the compiled frame will not be usable by | |
| 479 // the interpreter. (Depending on the calling convention there | |
| 480 // may not even be enough space). | |
| 481 | |
| 482 // QQQ I'd rather see this pushed down into last_frame_adjust | |
| 483 // and have it take the sender (aka caller). | |
| 484 | |
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485 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
| 0 | 486 caller_adjustment = last_frame_adjust(0, callee_locals); |
|
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487 } else if (callee_locals > callee_parameters) { |
| 0 | 488 // The caller frame may need extending to accommodate |
| 489 // non-parameter locals of the first unpacked interpreted frame. | |
| 490 // Compute that adjustment. | |
|
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491 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
| 0 | 492 } |
| 493 | |
| 494 // If the sender is deoptimized the we must retrieve the address of the handler | |
| 495 // since the frame will "magically" show the original pc before the deopt | |
| 496 // and we'd undo the deopt. | |
| 497 | |
| 498 frame_pcs[0] = deopt_sender.raw_pc(); | |
| 499 | |
| 1692 | 500 #ifndef SHARK |
| 0 | 501 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
| 1692 | 502 #endif // SHARK |
| 0 | 503 |
| 504 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, | |
| 505 caller_adjustment * BytesPerWord, | |
|
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506 caller_was_method_handle ? 0 : callee_parameters, |
| 0 | 507 number_of_frames, |
| 508 frame_sizes, | |
| 509 frame_pcs, | |
| 510 return_type); | |
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511 // On some platforms, we need a way to pass some platform dependent |
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512 // information to the unpacking code so the skeletal frames come out |
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513 // correct (initial fp value, unextended sp, ...) |
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514 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
| 0 | 515 |
| 516 if (array->frames() > 1) { | |
| 517 if (VerifyStack && TraceDeoptimization) { | |
| 6843 | 518 ttyLocker ttyl; |
| 0 | 519 tty->print_cr("Deoptimizing method containing inlining"); |
| 520 } | |
| 521 } | |
| 522 | |
| 523 array->set_unroll_block(info); | |
| 524 return info; | |
| 525 } | |
| 526 | |
| 527 // Called to cleanup deoptimization data structures in normal case | |
| 528 // after unpacking to stack and when stack overflow error occurs | |
| 529 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
| 530 vframeArray *array) { | |
| 531 | |
| 532 // Get array if coming from exception | |
| 533 if (array == NULL) { | |
| 534 array = thread->vframe_array_head(); | |
| 535 } | |
| 536 thread->set_vframe_array_head(NULL); | |
| 537 | |
| 538 // Free the previous UnrollBlock | |
| 539 vframeArray* old_array = thread->vframe_array_last(); | |
| 540 thread->set_vframe_array_last(array); | |
| 541 | |
| 542 if (old_array != NULL) { | |
| 543 UnrollBlock* old_info = old_array->unroll_block(); | |
| 544 old_array->set_unroll_block(NULL); | |
| 545 delete old_info; | |
| 546 delete old_array; | |
| 547 } | |
| 548 | |
| 549 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
| 550 // inside the vframeArray (StackValueCollections) | |
| 551 | |
| 552 delete thread->deopt_mark(); | |
| 553 thread->set_deopt_mark(NULL); | |
|
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554 thread->set_deopt_nmethod(NULL); |
| 0 | 555 |
| 556 | |
| 557 if (JvmtiExport::can_pop_frame()) { | |
| 558 #ifndef CC_INTERP | |
| 559 // Regardless of whether we entered this routine with the pending | |
| 560 // popframe condition bit set, we should always clear it now | |
| 561 thread->clear_popframe_condition(); | |
| 562 #else | |
| 563 // C++ interpeter will clear has_pending_popframe when it enters | |
| 564 // with method_resume. For deopt_resume2 we clear it now. | |
| 565 if (thread->popframe_forcing_deopt_reexecution()) | |
| 566 thread->clear_popframe_condition(); | |
| 567 #endif /* CC_INTERP */ | |
| 568 } | |
| 569 | |
| 570 // unpack_frames() is called at the end of the deoptimization handler | |
| 571 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
| 572 // so that an asynchronous stack walker can work again. This counter is | |
| 573 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
| 574 // the beginning of uncommon_trap(). | |
| 575 thread->dec_in_deopt_handler(); | |
| 576 } | |
| 577 | |
| 578 | |
| 579 // Return BasicType of value being returned | |
| 580 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
| 581 | |
| 582 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
| 583 // allocate will be freed at the end of the routine. | |
| 584 | |
| 585 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
| 586 // but makes the entry a little slower. There is however a little dance we have to | |
| 587 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
| 588 ResetNoHandleMark rnhm; // No-op in release/product versions | |
| 589 HandleMark hm; | |
| 590 | |
| 591 frame stub_frame = thread->last_frame(); | |
| 592 | |
| 593 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
| 594 // must point to the vframeArray for the unpack frame. | |
| 595 vframeArray* array = thread->vframe_array_head(); | |
| 596 | |
| 597 #ifndef PRODUCT | |
| 598 if (TraceDeoptimization) { | |
| 6843 | 599 ttyLocker ttyl; |
| 0 | 600 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
| 601 } | |
| 602 #endif | |
|
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603 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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604 stub_frame.pc(), stub_frame.sp(), exec_mode); |
| 0 | 605 |
| 606 UnrollBlock* info = array->unroll_block(); | |
| 607 | |
| 608 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
|
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609 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
| 0 | 610 |
| 611 BasicType bt = info->return_type(); | |
| 612 | |
| 613 // If we have an exception pending, claim that the return type is an oop | |
| 614 // so the deopt_blob does not overwrite the exception_oop. | |
| 615 | |
| 616 if (exec_mode == Unpack_exception) | |
| 617 bt = T_OBJECT; | |
| 618 | |
| 619 // Cleanup thread deopt data | |
| 620 cleanup_deopt_info(thread, array); | |
| 621 | |
| 622 #ifndef PRODUCT | |
| 623 if (VerifyStack) { | |
| 624 ResourceMark res_mark; | |
| 625 | |
|
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|
626 thread->validate_frame_layout(); |
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|
627 |
| 0 | 628 // Verify that the just-unpacked frames match the interpreter's |
| 629 // notions of expression stack and locals | |
| 630 vframeArray* cur_array = thread->vframe_array_last(); | |
| 631 RegisterMap rm(thread, false); | |
| 632 rm.set_include_argument_oops(false); | |
| 633 bool is_top_frame = true; | |
| 634 int callee_size_of_parameters = 0; | |
| 635 int callee_max_locals = 0; | |
| 636 for (int i = 0; i < cur_array->frames(); i++) { | |
| 637 vframeArrayElement* el = cur_array->element(i); | |
| 638 frame* iframe = el->iframe(); | |
| 639 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
| 640 | |
| 641 // Get the oop map for this bci | |
| 642 InterpreterOopMap mask; | |
| 643 int cur_invoke_parameter_size = 0; | |
| 644 bool try_next_mask = false; | |
| 645 int next_mask_expression_stack_size = -1; | |
| 646 int top_frame_expression_stack_adjustment = 0; | |
| 647 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
| 648 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
| 649 BytecodeStream str(mh); | |
| 650 str.set_start(iframe->interpreter_frame_bci()); | |
| 651 int max_bci = mh->code_size(); | |
| 652 // Get to the next bytecode if possible | |
| 653 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
| 654 // Check to see if we can grab the number of outgoing arguments | |
| 655 // at an uncommon trap for an invoke (where the compiler | |
| 656 // generates debug info before the invoke has executed) | |
| 657 Bytecodes::Code cur_code = str.next(); | |
| 10390 | 658 if (cur_code == Bytecodes::_invokevirtual || |
| 659 cur_code == Bytecodes::_invokespecial || | |
| 660 cur_code == Bytecodes::_invokestatic || | |
| 661 cur_code == Bytecodes::_invokeinterface || | |
| 662 cur_code == Bytecodes::_invokedynamic) { | |
| 2142 | 663 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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664 Symbol* signature = invoke.signature(); |
| 0 | 665 ArgumentSizeComputer asc(signature); |
| 666 cur_invoke_parameter_size = asc.size(); | |
| 10390 | 667 if (invoke.has_receiver()) { |
| 0 | 668 // Add in receiver |
| 669 ++cur_invoke_parameter_size; | |
| 670 } | |
| 10390 | 671 if (i != 0 && !invoke.is_invokedynamic() && MethodHandles::has_member_arg(invoke.klass(), invoke.name())) { |
| 672 callee_size_of_parameters++; | |
| 673 } | |
| 0 | 674 } |
| 675 if (str.bci() < max_bci) { | |
| 676 Bytecodes::Code bc = str.next(); | |
| 677 if (bc >= 0) { | |
| 678 // The interpreter oop map generator reports results before | |
| 679 // the current bytecode has executed except in the case of | |
| 680 // calls. It seems to be hard to tell whether the compiler | |
| 681 // has emitted debug information matching the "state before" | |
| 682 // a given bytecode or the state after, so we try both | |
| 683 switch (cur_code) { | |
| 684 case Bytecodes::_invokevirtual: | |
| 685 case Bytecodes::_invokespecial: | |
| 686 case Bytecodes::_invokestatic: | |
| 687 case Bytecodes::_invokeinterface: | |
| 10390 | 688 case Bytecodes::_invokedynamic: |
| 0 | 689 case Bytecodes::_athrow: |
| 690 break; | |
| 691 default: { | |
| 692 InterpreterOopMap next_mask; | |
| 693 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
| 694 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
| 695 // Need to subtract off the size of the result type of | |
| 696 // the bytecode because this is not described in the | |
| 697 // debug info but returned to the interpreter in the TOS | |
| 698 // caching register | |
| 699 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
| 700 if (bytecode_result_type != T_ILLEGAL) { | |
| 701 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
| 702 } | |
| 703 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
| 704 try_next_mask = true; | |
| 705 break; | |
| 706 } | |
| 707 } | |
| 708 } | |
| 709 } | |
| 710 | |
| 711 // Verify stack depth and oops in frame | |
| 712 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
| 713 if (!( | |
| 714 /* SPARC */ | |
| 715 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
| 716 /* x86 */ | |
| 717 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
| 718 (try_next_mask && | |
| 719 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
| 720 top_frame_expression_stack_adjustment))) || | |
| 721 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
| 722 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute) && | |
| 723 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) | |
| 724 )) { | |
| 725 ttyLocker ttyl; | |
| 726 | |
| 727 // Print out some information that will help us debug the problem | |
| 728 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
| 729 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
| 730 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
| 731 iframe->interpreter_frame_expression_stack_size()); | |
| 732 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
| 733 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
| 734 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
| 735 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
| 736 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
| 737 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
| 738 tty->print_cr(" exec_mode = %d", exec_mode); | |
| 739 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
| 740 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
| 741 tty->print_cr(" Interpreted frames:"); | |
| 742 for (int k = 0; k < cur_array->frames(); k++) { | |
| 743 vframeArrayElement* el = cur_array->element(k); | |
| 744 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
| 745 } | |
| 746 cur_array->print_on_2(tty); | |
| 747 guarantee(false, "wrong number of expression stack elements during deopt"); | |
| 748 } | |
| 749 VerifyOopClosure verify; | |
|
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750 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
| 0 | 751 callee_size_of_parameters = mh->size_of_parameters(); |
| 752 callee_max_locals = mh->max_locals(); | |
| 753 is_top_frame = false; | |
| 754 } | |
| 755 } | |
| 756 #endif /* !PRODUCT */ | |
| 757 | |
| 758 | |
| 759 return bt; | |
| 760 JRT_END | |
| 761 | |
| 762 | |
| 763 int Deoptimization::deoptimize_dependents() { | |
| 764 Threads::deoptimized_wrt_marked_nmethods(); | |
| 765 return 0; | |
| 766 } | |
| 767 | |
| 768 | |
|
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769 #if defined(COMPILER2) || defined(GRAAL) |
| 0 | 770 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
| 771 Handle pending_exception(thread->pending_exception()); | |
| 772 const char* exception_file = thread->exception_file(); | |
| 773 int exception_line = thread->exception_line(); | |
| 774 thread->clear_pending_exception(); | |
| 775 | |
| 776 for (int i = 0; i < objects->length(); i++) { | |
| 777 assert(objects->at(i)->is_object(), "invalid debug information"); | |
| 778 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
| 779 | |
|
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780 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 781 oop obj = NULL; |
| 782 | |
| 783 if (k->oop_is_instance()) { | |
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784 InstanceKlass* ik = InstanceKlass::cast(k()); |
| 0 | 785 obj = ik->allocate_instance(CHECK_(false)); |
| 786 } else if (k->oop_is_typeArray()) { | |
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787 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
| 0 | 788 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
| 789 int len = sv->field_size() / type2size[ak->element_type()]; | |
| 790 obj = ak->allocate(len, CHECK_(false)); | |
| 791 } else if (k->oop_is_objArray()) { | |
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792 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
| 0 | 793 obj = ak->allocate(sv->field_size(), CHECK_(false)); |
| 794 } | |
| 795 | |
| 796 assert(obj != NULL, "allocation failed"); | |
| 797 assert(sv->value().is_null(), "redundant reallocation"); | |
| 798 sv->set_value(obj); | |
| 799 } | |
| 800 | |
| 801 if (pending_exception.not_null()) { | |
| 802 thread->set_pending_exception(pending_exception(), exception_file, exception_line); | |
| 803 } | |
| 804 | |
| 805 return true; | |
| 806 } | |
| 807 | |
| 808 // restore elements of an eliminated type array | |
| 809 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
| 810 int index = 0; | |
|
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811 intptr_t val; |
| 0 | 812 |
| 813 for (int i = 0; i < sv->field_size(); i++) { | |
| 814 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
| 815 switch(type) { | |
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816 case T_LONG: case T_DOUBLE: { |
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817 assert(value->type() == T_INT, "Agreement."); |
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818 StackValue* low = |
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819 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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820 #ifdef _LP64 |
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821 jlong res = (jlong)low->get_int(); |
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822 #else |
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823 #ifdef SPARC |
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824 // For SPARC we have to swap high and low words. |
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changeset
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825 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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826 #else |
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827 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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828 #endif //SPARC |
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829 #endif |
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830 obj->long_at_put(index, res); |
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|
831 break; |
|
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|
832 } |
|
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|
833 |
|
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|
834 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
|
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|
835 case T_INT: case T_FLOAT: { // 4 bytes. |
|
44
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|
836 assert(value->type() == T_INT, "Agreement."); |
|
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|
837 bool big_value = false; |
|
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838 if (i + 1 < sv->field_size() && type == T_INT) { |
|
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839 if (sv->field_at(i)->is_location()) { |
|
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840 Location::Type type = ((LocationValue*) sv->field_at(i))->location().type(); |
|
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841 if (type == Location::dbl || type == Location::lng) { |
|
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842 big_value = true; |
|
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843 } |
|
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844 } else if (sv->field_at(i)->is_constant_int()) { |
|
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|
845 ScopeValue* next_scope_field = sv->field_at(i + 1); |
|
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|
846 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
|
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847 big_value = true; |
|
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|
848 } |
|
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849 } |
|
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|
850 } |
|
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|
851 |
|
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|
852 if (big_value) { |
|
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|
853 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
|
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854 #ifdef _LP64 |
|
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|
855 jlong res = (jlong)low->get_int(); |
|
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|
856 #else |
|
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857 #ifdef SPARC |
|
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Truffle: fix deoptimization of int[] with double/long values
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858 // For SPARC we have to swap high and low words. |
|
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|
859 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
|
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860 #else |
|
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861 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
|
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862 #endif //SPARC |
|
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863 #endif |
|
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864 obj->int_at_put(index, (jint)*((jint*)&res)); |
|
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|
865 obj->int_at_put(++index, (jint)*(((jint*)&res) + 1)); |
|
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|
866 } else { |
|
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|
867 val = value->get_int(); |
|
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|
868 obj->int_at_put(index, (jint)*((jint*)&val)); |
|
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|
869 } |
|
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|
870 break; |
|
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871 } |
|
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|
872 |
|
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|
873 case T_SHORT: case T_CHAR: // 2 bytes |
|
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|
874 assert(value->type() == T_INT, "Agreement."); |
|
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|
875 val = value->get_int(); |
|
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changeset
|
876 obj->short_at_put(index, (jshort)*((jint*)&val)); |
|
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|
877 break; |
|
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|
878 |
|
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diff
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|
879 case T_BOOLEAN: case T_BYTE: // 1 byte |
|
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|
880 assert(value->type() == T_INT, "Agreement."); |
|
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0
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|
881 val = value->get_int(); |
|
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|
882 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
|
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|
883 break; |
|
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|
884 |
| 0 | 885 default: |
| 886 ShouldNotReachHere(); | |
| 887 } | |
| 888 index++; | |
| 889 } | |
| 890 } | |
| 891 | |
| 892 | |
| 893 // restore fields of an eliminated object array | |
| 894 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
| 895 for (int i = 0; i < sv->field_size(); i++) { | |
| 896 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
| 897 assert(value->type() == T_OBJECT, "object element expected"); | |
| 898 obj->obj_at_put(i, value->get_obj()()); | |
| 899 } | |
| 900 } | |
| 901 | |
| 7222 | 902 class ReassignedField { |
| 903 public: | |
| 904 int _offset; | |
| 905 BasicType _type; | |
| 906 public: | |
| 907 ReassignedField() { | |
| 908 _offset = 0; | |
| 909 _type = T_ILLEGAL; | |
| 910 } | |
| 911 }; | |
|
7137
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|
912 |
|
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|
913 int compare(ReassignedField* left, ReassignedField* right) { |
| 7222 | 914 return left->_offset - right->_offset; |
|
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|
915 } |
|
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|
916 |
|
6948
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
917 // Restore fields of an eliminated instance object using the same field order |
|
18223
17c98fad6980
converted HotSpotResolvedObjectType to an interface
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|
918 // returned by HotSpotResolvedObjectTypeImpl.getInstanceFields(true) |
|
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diff
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|
919 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj) { |
|
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|
920 if (klass->superklass() != NULL) { |
|
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Doug Simon <doug.simon@oracle.com>
diff
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|
921 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj); |
|
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|
922 } |
|
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|
923 |
|
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|
924 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
|
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|
925 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
|
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|
926 if (!fs.access_flags().is_static()) { |
|
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|
927 ReassignedField field; |
| 7222 | 928 field._offset = fs.offset(); |
| 929 field._type = FieldType::basic_type(fs.signature()); | |
|
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|
930 fields->append(field); |
|
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|
931 } |
|
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|
932 } |
|
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|
933 fields->sort(compare); |
|
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|
934 for (int i = 0; i < fields->length(); i++) { |
|
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Doug Simon <doug.simon@oracle.com>
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|
935 intptr_t val; |
|
12617
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|
936 ScopeValue* scope_field = sv->field_at(svIndex); |
|
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|
937 StackValue* value = StackValue::create_stack_value(fr, reg_map, scope_field); |
| 7222 | 938 int offset = fields->at(i)._offset; |
| 939 BasicType type = fields->at(i)._type; | |
|
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|
940 switch (type) { |
|
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|
941 case T_OBJECT: case T_ARRAY: |
|
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|
942 assert(value->type() == T_OBJECT, "Agreement."); |
|
e522a00b91aa
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|
943 obj->obj_field_put(offset, value->get_obj()()); |
|
e522a00b91aa
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|
944 break; |
|
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|
945 |
|
12617
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|
946 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
|
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changeset
|
947 case T_INT: case T_FLOAT: { // 4 bytes. |
|
bca33c3135de
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changeset
|
948 assert(value->type() == T_INT, "Agreement."); |
|
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|
949 bool big_value = false; |
|
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|
950 if (i+1 < fields->length() && fields->at(i+1)._type == T_INT) { |
|
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|
951 if (scope_field->is_location()) { |
|
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changeset
|
952 Location::Type type = ((LocationValue*) scope_field)->location().type(); |
|
bca33c3135de
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|
953 if (type == Location::dbl || type == Location::lng) { |
|
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changeset
|
954 big_value = true; |
|
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|
955 } |
|
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|
956 } |
|
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changeset
|
957 if (scope_field->is_constant_int()) { |
|
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|
958 ScopeValue* next_scope_field = sv->field_at(svIndex + 1); |
|
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959 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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960 big_value = true; |
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961 } |
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962 } |
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963 } |
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964 |
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965 if (big_value) { |
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966 i++; |
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967 assert(i < fields->length(), "second T_INT field needed"); |
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968 assert(fields->at(i)._type == T_INT, "T_INT field needed"); |
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969 } else { |
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970 val = value->get_int(); |
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971 obj->int_field_put(offset, (jint)*((jint*)&val)); |
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972 break; |
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973 } |
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974 } |
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975 /* no break */ |
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976 |
|
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977 case T_LONG: case T_DOUBLE: { |
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978 assert(value->type() == T_INT, "Agreement."); |
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979 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
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980 #ifdef _LP64 |
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981 jlong res = (jlong)low->get_int(); |
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982 #else |
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983 #ifdef SPARC |
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984 // For SPARC we have to swap high and low words. |
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985 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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986 #else |
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987 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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988 #endif //SPARC |
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989 #endif |
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990 obj->long_field_put(offset, res); |
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991 break; |
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992 } |
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993 |
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994 case T_SHORT: case T_CHAR: // 2 bytes |
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995 assert(value->type() == T_INT, "Agreement."); |
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996 val = value->get_int(); |
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997 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
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998 break; |
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999 |
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1000 case T_BOOLEAN: case T_BYTE: // 1 byte |
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1001 assert(value->type() == T_INT, "Agreement."); |
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1002 val = value->get_int(); |
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1003 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
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1004 break; |
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1005 |
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1006 default: |
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1007 ShouldNotReachHere(); |
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1008 } |
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1009 svIndex++; |
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1010 } |
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1011 return svIndex; |
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1012 } |
| 0 | 1013 |
| 1014 // restore fields of all eliminated objects and arrays | |
| 1015 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects) { | |
| 1016 for (int i = 0; i < objects->length(); i++) { | |
| 1017 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
|
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1018 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 1019 Handle obj = sv->value(); |
| 1020 assert(obj.not_null(), "reallocation was missed"); | |
|
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1021 if (PrintDeoptimizationDetails) { |
|
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1022 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
|
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1023 } |
| 0 | 1024 |
| 1025 if (k->oop_is_instance()) { | |
|
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1026 InstanceKlass* ik = InstanceKlass::cast(k()); |
|
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1027 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj()); |
| 0 | 1028 } else if (k->oop_is_typeArray()) { |
|
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1029 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
| 0 | 1030 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
| 1031 } else if (k->oop_is_objArray()) { | |
| 1032 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
| 1033 } | |
| 1034 } | |
| 1035 } | |
| 1036 | |
| 1037 | |
| 1038 // relock objects for which synchronization was eliminated | |
|
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1039 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread) { |
| 0 | 1040 for (int i = 0; i < monitors->length(); i++) { |
|
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1041 MonitorInfo* mon_info = monitors->at(i); |
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1042 if (mon_info->eliminated()) { |
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1043 assert(mon_info->owner() != NULL, "reallocation was missed"); |
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1044 Handle obj = Handle(mon_info->owner()); |
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1045 markOop mark = obj->mark(); |
|
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1046 if (UseBiasedLocking && mark->has_bias_pattern()) { |
|
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1047 // New allocated objects may have the mark set to anonymously biased. |
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1048 // Also the deoptimized method may called methods with synchronization |
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1049 // where the thread-local object is bias locked to the current thread. |
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1050 assert(mark->is_biased_anonymously() || |
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1051 mark->biased_locker() == thread, "should be locked to current thread"); |
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1052 // Reset mark word to unbiased prototype. |
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1053 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1054 obj->set_mark(unbiased_prototype); |
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1055 } |
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1056 BasicLock* lock = mon_info->lock(); |
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1057 ObjectSynchronizer::slow_enter(obj, lock, thread); |
| 0 | 1058 } |
|
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1059 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
| 0 | 1060 } |
| 1061 } | |
| 1062 | |
| 1063 | |
| 1064 #ifndef PRODUCT | |
| 1065 // print information about reallocated objects | |
| 1066 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects) { | |
| 1067 fieldDescriptor fd; | |
| 1068 | |
| 1069 for (int i = 0; i < objects->length(); i++) { | |
| 1070 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1071 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 1072 Handle obj = sv->value(); |
| 1073 | |
|
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1074 tty->print(" object <" INTPTR_FORMAT "> of type ", (void *)sv->value()()); |
|
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1075 k->print_value(); |
| 0 | 1076 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
| 1077 tty->cr(); | |
| 1078 | |
| 1079 if (Verbose) { | |
| 1080 k->oop_print_on(obj(), tty); | |
| 1081 } | |
| 1082 } | |
| 1083 } | |
| 1084 #endif | |
|
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|
1085 #endif // COMPILER2 || GRAAL |
| 0 | 1086 |
| 1087 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk) { | |
|
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|
1088 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
| 0 | 1089 |
| 1090 #ifndef PRODUCT | |
|
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1091 if (PrintDeoptimizationDetails) { |
| 0 | 1092 ttyLocker ttyl; |
| 1093 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
| 1094 fr.print_on(tty); | |
| 1095 tty->print_cr(" Virtual frames (innermost first):"); | |
| 1096 for (int index = 0; index < chunk->length(); index++) { | |
| 1097 compiledVFrame* vf = chunk->at(index); | |
| 1098 tty->print(" %2d - ", index); | |
| 1099 vf->print_value(); | |
| 1100 int bci = chunk->at(index)->raw_bci(); | |
| 1101 const char* code_name; | |
| 1102 if (bci == SynchronizationEntryBCI) { | |
| 1103 code_name = "sync entry"; | |
| 1104 } else { | |
| 2142 | 1105 Bytecodes::Code code = vf->method()->code_at(bci); |
| 0 | 1106 code_name = Bytecodes::name(code); |
| 1107 } | |
| 1108 tty->print(" - %s", code_name); | |
| 1109 tty->print_cr(" @ bci %d ", bci); | |
| 1110 if (Verbose) { | |
| 1111 vf->print(); | |
| 1112 tty->cr(); | |
| 1113 } | |
| 1114 } | |
| 1115 } | |
| 1116 #endif | |
| 1117 | |
| 1118 // Register map for next frame (used for stack crawl). We capture | |
| 1119 // the state of the deopt'ing frame's caller. Thus if we need to | |
| 1120 // stuff a C2I adapter we can properly fill in the callee-save | |
| 1121 // register locations. | |
| 1122 frame caller = fr.sender(reg_map); | |
| 1123 int frame_size = caller.sp() - fr.sp(); | |
| 1124 | |
| 1125 frame sender = caller; | |
| 1126 | |
| 1127 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
| 1128 // the vframeArray containing the unpacking information is allocated in the C heap. | |
| 1129 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
| 1130 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr); | |
| 1131 | |
| 1132 // Compare the vframeArray to the collected vframes | |
| 1133 assert(array->structural_compare(thread, chunk), "just checking"); | |
| 1134 | |
| 1135 #ifndef PRODUCT | |
|
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
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4661
diff
changeset
|
1136 if (PrintDeoptimizationDetails) { |
| 0 | 1137 ttyLocker ttyl; |
| 1138 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
| 1139 } | |
| 1140 #endif // PRODUCT | |
| 1141 | |
| 1142 return array; | |
| 1143 } | |
| 1144 | |
| 1145 | |
| 1146 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
| 1147 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
| 1148 for (int i = 0; i < monitors->length(); i++) { | |
| 1149 MonitorInfo* mon_info = monitors->at(i); | |
|
818
b109e761e927
6837472: com/sun/jdi/MonitorFrameInfo.java fails with AggressiveOpts in 6u14
kvn
parents:
196
diff
changeset
|
1150 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
| 0 | 1151 objects_to_revoke->append(Handle(mon_info->owner())); |
| 1152 } | |
| 1153 } | |
| 1154 } | |
| 1155 | |
| 1156 | |
| 1157 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
| 1158 if (!UseBiasedLocking) { | |
| 1159 return; | |
| 1160 } | |
| 1161 | |
| 1162 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 1163 | |
| 1164 // Unfortunately we don't have a RegisterMap available in most of | |
| 1165 // the places we want to call this routine so we need to walk the | |
| 1166 // stack again to update the register map. | |
| 1167 if (map == NULL || !map->update_map()) { | |
| 1168 StackFrameStream sfs(thread, true); | |
| 1169 bool found = false; | |
| 1170 while (!found && !sfs.is_done()) { | |
| 1171 frame* cur = sfs.current(); | |
| 1172 sfs.next(); | |
| 1173 found = cur->id() == fr.id(); | |
| 1174 } | |
| 1175 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
| 1176 map = sfs.register_map(); | |
| 1177 } | |
| 1178 | |
| 1179 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
| 1180 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1181 // Revoke monitors' biases in all scopes | |
| 1182 while (!cvf->is_top()) { | |
| 1183 collect_monitors(cvf, objects_to_revoke); | |
| 1184 cvf = compiledVFrame::cast(cvf->sender()); | |
| 1185 } | |
| 1186 collect_monitors(cvf, objects_to_revoke); | |
| 1187 | |
| 1188 if (SafepointSynchronize::is_at_safepoint()) { | |
| 1189 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
| 1190 } else { | |
| 1191 BiasedLocking::revoke(objects_to_revoke); | |
| 1192 } | |
| 1193 } | |
| 1194 | |
| 1195 | |
| 1196 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
| 1197 if (!UseBiasedLocking) { | |
| 1198 return; | |
| 1199 } | |
| 1200 | |
| 1201 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
| 1202 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 1203 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
| 1204 if (jt->has_last_Java_frame()) { | |
| 1205 StackFrameStream sfs(jt, true); | |
| 1206 while (!sfs.is_done()) { | |
| 1207 frame* cur = sfs.current(); | |
| 1208 if (cb->contains(cur->pc())) { | |
| 1209 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
| 1210 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1211 // Revoke monitors' biases in all scopes | |
| 1212 while (!cvf->is_top()) { | |
| 1213 collect_monitors(cvf, objects_to_revoke); | |
| 1214 cvf = compiledVFrame::cast(cvf->sender()); | |
| 1215 } | |
| 1216 collect_monitors(cvf, objects_to_revoke); | |
| 1217 } | |
| 1218 sfs.next(); | |
| 1219 } | |
| 1220 } | |
| 1221 } | |
| 1222 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
| 1223 } | |
| 1224 | |
| 1225 | |
|
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1226 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
| 0 | 1227 assert(fr.can_be_deoptimized(), "checking frame type"); |
| 1228 | |
|
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1229 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
| 0 | 1230 |
| 1231 // Patch the nmethod so that when execution returns to it we will | |
| 1232 // deopt the execution state and return to the interpreter. | |
| 1233 fr.deoptimize(thread); | |
|
18225
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1234 |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
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diff
changeset
|
1235 if (LogCompilation && xtty != NULL) { |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1236 nmethod* nm = fr.cb()->as_nmethod_or_null(); |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1237 assert(nm != NULL, "only nmethods can deopt"); |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1238 |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
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diff
changeset
|
1239 ttyLocker ttyl; |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1240 xtty->begin_head("deoptimized thread='" UINTX_FORMAT "' compile_id='%d'", |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1241 thread->osthread()->thread_id(), nm != NULL ? nm->compile_id() : -1); |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1242 nm->log_identity(xtty); |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1243 xtty->end_head(); |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1244 for (ScopeDesc* sd = nm->scope_desc_at(fr.pc()); ; sd = sd->sender()) { |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1245 xtty->begin_elem("jvms bci='%d'", sd->bci()); |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1246 xtty->method(sd->method()); |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1247 xtty->end_elem(); |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1248 if (sd->is_top()) break; |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1249 } |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1250 xtty->tail("deoptimized"); |
|
40074f6ac788
Record frame state for deopts with +LogCompilation
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18133
diff
changeset
|
1251 } |
| 0 | 1252 } |
| 1253 | |
| 1254 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map) { | |
|
13188
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1255 deoptimize(thread, fr, map, Reason_constraint); |
|
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1256 } |
|
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1257 |
|
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
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diff
changeset
|
1258 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
| 0 | 1259 // Deoptimize only if the frame comes from compile code. |
| 1260 // Do not deoptimize the frame which is already patched | |
| 1261 // during the execution of the loops below. | |
| 1262 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
| 1263 return; | |
| 1264 } | |
| 1265 ResourceMark rm; | |
| 1266 DeoptimizationMarker dm; | |
| 1267 if (UseBiasedLocking) { | |
| 1268 revoke_biases_of_monitors(thread, fr, map); | |
| 1269 } | |
|
5110
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more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1270 deoptimize_single_frame(thread, fr, reason); |
| 0 | 1271 |
| 1272 } | |
| 1273 | |
| 1274 | |
|
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1275 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
|
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1276 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
|
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1277 "can only deoptimize other thread at a safepoint"); |
| 0 | 1278 // Compute frame and register map based on thread and sp. |
| 1279 RegisterMap reg_map(thread, UseBiasedLocking); | |
| 1280 frame fr = thread->last_frame(); | |
| 1281 while (fr.id() != id) { | |
| 1282 fr = fr.sender(®_map); | |
| 1283 } | |
|
5110
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more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1284 deoptimize(thread, fr, ®_map, reason); |
| 0 | 1285 } |
| 1286 | |
| 1287 | |
|
5110
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more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1288 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
|
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1289 if (thread == Thread::current()) { |
|
5110
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more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1290 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
|
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1291 } else { |
|
5110
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more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5038
diff
changeset
|
1292 VM_DeoptimizeFrame deopt(thread, id, reason); |
|
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1293 VMThread::execute(&deopt); |
|
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1294 } |
|
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
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|
1295 } |
|
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1296 |
|
13188
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1297 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id) { |
|
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1298 deoptimize_frame(thread, id, Reason_constraint); |
|
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13172
diff
changeset
|
1299 } |
|
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
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|
1300 |
| 0 | 1301 // JVMTI PopFrame support |
| 1302 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
| 1303 { | |
| 1304 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
| 1305 } | |
| 1306 JRT_END | |
| 1307 | |
| 1308 | |
|
4978
99d3d8a72252
More ifdef GRAAL usage.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
4970
diff
changeset
|
1309 #if defined(COMPILER2) || defined(SHARK) || defined(GRAAL) |
| 0 | 1310 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
| 1311 // in case of an unresolved klass entry, load the class. | |
| 1312 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1313 Klass* tk = constant_pool->klass_at(index, CHECK); |
| 0 | 1314 return; |
| 1315 } | |
| 1316 | |
| 1317 if (!constant_pool->tag_at(index).is_symbol()) return; | |
| 1318 | |
|
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1319 Handle class_loader (THREAD, constant_pool->pool_holder()->class_loader()); |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1320 Symbol* symbol = constant_pool->symbol_at(index); |
| 0 | 1321 |
| 1322 // class name? | |
| 1323 if (symbol->byte_at(0) != '(') { | |
|
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1324 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
| 0 | 1325 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
| 1326 return; | |
| 1327 } | |
| 1328 | |
| 1329 // then it must be a signature! | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1330 ResourceMark rm(THREAD); |
| 0 | 1331 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
| 1332 if (ss.is_object()) { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1333 Symbol* class_name = ss.as_symbol(CHECK); |
|
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1334 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
| 0 | 1335 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
| 1336 } | |
| 1337 } | |
| 1338 } | |
| 1339 | |
| 1340 | |
| 1341 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
| 1342 EXCEPTION_MARK; | |
| 1343 load_class_by_index(constant_pool, index, THREAD); | |
| 1344 if (HAS_PENDING_EXCEPTION) { | |
| 1345 // Exception happened during classloading. We ignore the exception here, since it | |
|
14230
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1346 // is going to be rethrown since the current activation is going to be deoptimized and |
| 0 | 1347 // the interpreter will re-execute the bytecode. |
| 1348 CLEAR_PENDING_EXCEPTION; | |
|
14230
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1349 // Class loading called java code which may have caused a stack |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1350 // overflow. If the exception was thrown right before the return |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1351 // to the runtime the stack is no longer guarded. Reguard the |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1352 // stack otherwise if we return to the uncommon trap blob and the |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1353 // stack bang causes a stack overflow we crash. |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1354 assert(THREAD->is_Java_thread(), "only a java thread can be here"); |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1355 JavaThread* thread = (JavaThread*)THREAD; |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1356 bool guard_pages_enabled = thread->stack_yellow_zone_enabled(); |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
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parents:
12316
diff
changeset
|
1357 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1358 assert(guard_pages_enabled, "stack banging in uncommon trap blob may cause crash"); |
| 0 | 1359 } |
| 1360 } | |
| 1361 | |
| 1362 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
| 1363 HandleMark hm; | |
| 1364 | |
| 1365 // uncommon_trap() is called at the beginning of the uncommon trap | |
| 1366 // handler. Note this fact before we start generating temporary frames | |
| 1367 // that can confuse an asynchronous stack walker. This counter is | |
| 1368 // decremented at the end of unpack_frames(). | |
| 1369 thread->inc_in_deopt_handler(); | |
| 1370 | |
| 1371 // We need to update the map if we have biased locking. | |
|
6428
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1372 #ifdef GRAAL |
|
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1373 // (lstadler) Graal might need to get an exception from the stack, which in turn requires the register map to be valid |
|
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1374 RegisterMap reg_map(thread, true); |
|
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1375 #else |
| 0 | 1376 RegisterMap reg_map(thread, UseBiasedLocking); |
|
6428
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1377 #endif |
| 0 | 1378 frame stub_frame = thread->last_frame(); |
| 1379 frame fr = stub_frame.sender(®_map); | |
| 1380 // Make sure the calling nmethod is not getting deoptimized and removed | |
| 1381 // before we are done with it. | |
| 1382 nmethodLocker nl(fr.pc()); | |
| 1383 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4777
diff
changeset
|
1384 // Log a message |
|
10721
5fc4aedf7910
add relative pc to uncommon trap event entry (helps debugging SEGFAULTs in copmiled code)
Lukas Stadler <lukas.stadler@jku.at>
parents:
10408
diff
changeset
|
1385 Events::log(thread, "Uncommon trap: trap_request=" PTR32_FORMAT " fr.pc=" INTPTR_FORMAT " relative=" INTPTR_FORMAT, |
|
5fc4aedf7910
add relative pc to uncommon trap event entry (helps debugging SEGFAULTs in copmiled code)
Lukas Stadler <lukas.stadler@jku.at>
parents:
10408
diff
changeset
|
1386 trap_request, fr.pc(), fr.pc() - fr.cb()->code_begin()); |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4777
diff
changeset
|
1387 |
| 0 | 1388 { |
| 1389 ResourceMark rm; | |
| 1390 | |
| 1391 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
| 1392 revoke_biases_of_monitors(thread, fr, ®_map); | |
| 1393 | |
| 1394 DeoptReason reason = trap_request_reason(trap_request); | |
| 1395 DeoptAction action = trap_request_action(trap_request); | |
|
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1396 #ifdef GRAAL |
|
13857
a9604b40f5e7
On HotSpot, debug_id should be an int, not a short
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13768
diff
changeset
|
1397 int debug_id = trap_request_debug_id(trap_request); |
|
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1398 #endif |
| 0 | 1399 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 |
| 1400 | |
| 1401 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
| 1402 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1403 | |
| 1404 nmethod* nm = cvf->code(); | |
| 1405 | |
| 1406 ScopeDesc* trap_scope = cvf->scope(); | |
|
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1407 |
|
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1408 if (TraceDeoptimization) { |
|
15652
3397e82e2f35
fix printing of pc in deopt message
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
15582
diff
changeset
|
1409 tty->print_cr(" bci=%d pc=" INTPTR_FORMAT ", relative_pc=%d, method=%s" GRAAL_ONLY(", debug_id=%d"), trap_scope->bci(), fr.pc(), fr.pc() - nm->code_begin(), trap_scope->method()->name_and_sig_as_C_string() |
|
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1410 #ifdef GRAAL |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1411 , debug_id |
|
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1412 #endif |
|
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1413 ); |
|
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1414 } |
| 0 | 1415 |
| 1416 methodHandle trap_method = trap_scope->method(); | |
| 1417 int trap_bci = trap_scope->bci(); | |
|
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1418 #ifdef GRAAL |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1419 oop speculation = thread->pending_failed_speculation(); |
|
13713
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1420 if (nm->is_compiled_by_graal()) { |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1421 if (speculation != NULL) { |
|
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1422 oop speculation_log = nm->speculation_log(); |
|
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1423 if (speculation_log != NULL) { |
|
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1424 if (TraceDeoptimization || TraceUncollectedSpeculations) { |
|
13642
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1425 if (SpeculationLog::lastFailed(speculation_log) != NULL) { |
|
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1426 tty->print_cr("A speculation that was not collected by the compiler is being overwritten"); |
|
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1427 } |
|
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1428 } |
|
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1429 if (TraceDeoptimization) { |
|
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1430 tty->print_cr("Saving speculation to speculation log"); |
|
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1431 } |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1432 SpeculationLog::set_lastFailed(speculation_log, speculation); |
|
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1433 } else { |
|
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1434 if (TraceDeoptimization) { |
|
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1435 tty->print_cr("Speculation present but no speculation log"); |
|
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1436 } |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1437 } |
|
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1438 thread->set_pending_failed_speculation(NULL); |
|
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1439 } else { |
|
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1440 if (TraceDeoptimization) { |
|
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1441 tty->print_cr("No speculation"); |
|
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1442 } |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1443 } |
|
13713
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1444 } else { |
|
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1445 #ifdef ASSERT |
|
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1446 assert(speculation == NULL, "There should not be a speculation for method compiled by other compilers"); |
|
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1447 #endif |
|
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1448 } |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1449 |
|
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1450 if (trap_bci == SynchronizationEntryBCI) { |
|
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1451 trap_bci = 0; |
|
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1452 Thread::current()->set_pending_monitorenter(true); |
|
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1453 } |
|
16535
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1454 |
|
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1455 if (reason == Deoptimization::Reason_transfer_to_interpreter) { |
|
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1456 thread->set_pending_transfer_to_interpreter(true); |
|
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1457 } |
|
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1458 #endif |
|
16535
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1459 |
| 2142 | 1460 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
| 0 | 1461 |
|
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1462 if (trap_scope->rethrow_exception()) { |
|
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
1463 if (PrintDeoptimizationDetails) { |
|
6948
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
1464 tty->print_cr("Exception to be rethrown in the interpreter for method %s::%s at bci %d", trap_method->method_holder()->name()->as_C_string(), trap_method->name()->as_C_string(), trap_bci); |
|
3019
77bb196828cb
Fixed an issue with accessing non-initialized static fields.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3018
diff
changeset
|
1465 } |
|
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1466 GrowableArray<ScopeValue*>* expressions = trap_scope->expressions(); |
|
3167
132aa6f2bbc0
Fixed rethrow exception frame state (again.. and this time added some useful assertions).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3153
diff
changeset
|
1467 guarantee(expressions != NULL, "must have exception to throw"); |
|
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1468 ScopeValue* topOfStack = expressions->top(); |
|
8151
b8f261ba79c6
Minimize diff to plain HotSpot version.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8124
diff
changeset
|
1469 Handle topOfStackObj = StackValue::create_stack_value(&fr, ®_map, topOfStack)->get_obj(); |
|
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1470 THREAD->set_pending_exception(topOfStackObj(), NULL, 0); |
|
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1471 } |
|
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1472 |
| 0 | 1473 // Record this event in the histogram. |
| 1474 gather_statistics(reason, action, trap_bc); | |
| 1475 | |
| 1476 // Ensure that we can record deopt. history: | |
| 17780 | 1477 // Need MDO to record RTM code generation state. |
| 1478 bool create_if_missing = ProfileTraps RTM_OPT_ONLY( || UseRTMLocking ); | |
| 0 | 1479 |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1480 methodHandle profiled_method; |
|
9571
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1481 #ifdef GRAAL |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1482 if (nm->is_compiled_by_graal()) { |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1483 profiled_method = nm->method(); |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1484 } else { |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1485 profiled_method = trap_method; |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1486 } |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1487 #else |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1488 profiled_method = trap_method; |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1489 #endif |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1490 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1491 MethodData* trap_mdo = |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1492 get_method_data(thread, profiled_method, create_if_missing); |
| 0 | 1493 |
|
7193
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1494 // Log a message |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1495 Events::log_deopt_message(thread, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT " method=%s @ %d", |
|
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1496 trap_reason_name(reason), trap_action_name(action), fr.pc(), |
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1497 trap_method->name_and_sig_as_C_string(), trap_bci); |
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1498 |
| 0 | 1499 // Print a bunch of diagnostics, if requested. |
| 1500 if (TraceDeoptimization || LogCompilation) { | |
| 1501 ResourceMark rm; | |
| 1502 ttyLocker ttyl; | |
| 1503 char buf[100]; | |
| 1504 if (xtty != NULL) { | |
| 1505 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
| 1506 os::current_thread_id(), | |
| 1507 format_trap_request(buf, sizeof(buf), trap_request)); | |
| 1508 nm->log_identity(xtty); | |
| 1509 } | |
|
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1510 Symbol* class_name = NULL; |
| 0 | 1511 bool unresolved = false; |
| 1512 if (unloaded_class_index >= 0) { | |
| 1513 constantPoolHandle constants (THREAD, trap_method->constants()); | |
| 1514 if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { | |
|
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1515 class_name = constants->klass_name_at(unloaded_class_index); |
| 0 | 1516 unresolved = true; |
| 1517 if (xtty != NULL) | |
| 1518 xtty->print(" unresolved='1'"); | |
| 1519 } else if (constants->tag_at(unloaded_class_index).is_symbol()) { | |
|
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1520 class_name = constants->symbol_at(unloaded_class_index); |
| 0 | 1521 } |
| 1522 if (xtty != NULL) | |
| 1523 xtty->name(class_name); | |
| 1524 } | |
|
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1525 if (xtty != NULL && trap_mdo != NULL) { |
| 0 | 1526 // Dump the relevant MDO state. |
| 1527 // This is the deopt count for the current reason, any previous | |
| 1528 // reasons or recompiles seen at this point. | |
| 1529 int dcnt = trap_mdo->trap_count(reason); | |
| 1530 if (dcnt != 0) | |
| 1531 xtty->print(" count='%d'", dcnt); | |
| 1532 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
| 1533 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
| 1534 if (dos != 0) { | |
| 1535 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
| 1536 if (trap_state_is_recompiled(dos)) { | |
| 1537 int recnt2 = trap_mdo->overflow_recompile_count(); | |
| 1538 if (recnt2 != 0) | |
| 1539 xtty->print(" recompiles2='%d'", recnt2); | |
| 1540 } | |
| 1541 } | |
| 1542 } | |
| 1543 if (xtty != NULL) { | |
| 1544 xtty->stamp(); | |
| 1545 xtty->end_head(); | |
| 1546 } | |
| 1547 if (TraceDeoptimization) { // make noise on the tty | |
| 1548 tty->print("Uncommon trap occurred in"); | |
| 1549 nm->method()->print_short_name(tty); | |
|
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1550 #ifdef GRAAL |
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1551 oop installedCode = nm->graal_installed_code(); |
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1552 if (installedCode != NULL) { |
|
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1553 oop installedCodeName = NULL; |
|
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1554 if (installedCode->is_a(InstalledCode::klass())) { |
|
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1555 installedCodeName = InstalledCode::name(installedCode); |
|
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1556 } |
|
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1557 if (installedCodeName != NULL) { |
|
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1558 tty->print(" (Graal: installedCodeName=%s) ", java_lang_String::as_utf8_string(installedCodeName)); |
|
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1559 } else { |
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1560 tty->print(" (Graal: installed code has no name) "); |
|
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|
1561 } |
|
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1562 } else if (nm->is_compiled_by_graal()) { |
|
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1563 tty->print(" (Graal: no installed code) "); |
|
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1564 } |
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1565 #endif //GRAAL |
|
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|
1566 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d" GRAAL_ONLY(" debug_id=%d"), |
| 0 | 1567 fr.pc(), |
| 6843 | 1568 os::current_thread_id(), |
| 0 | 1569 trap_reason_name(reason), |
| 1570 trap_action_name(action), | |
|
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|
1571 unloaded_class_index |
|
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|
1572 #ifdef GRAAL |
|
13641
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1573 , debug_id |
|
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|
1574 #endif |
|
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1575 ); |
|
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1576 if (class_name != NULL) { |
| 0 | 1577 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
| 1578 class_name->print_symbol_on(tty); | |
| 1579 } | |
| 1580 tty->cr(); | |
| 1581 } | |
| 1582 if (xtty != NULL) { | |
| 1583 // Log the precise location of the trap. | |
| 1584 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
| 1585 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
| 1586 xtty->method(sd->method()); | |
| 1587 xtty->end_elem(); | |
| 1588 if (sd->is_top()) break; | |
| 1589 } | |
| 1590 xtty->tail("uncommon_trap"); | |
| 1591 } | |
| 1592 } | |
| 1593 // (End diagnostic printout.) | |
| 1594 | |
| 1595 // Load class if necessary | |
| 1596 if (unloaded_class_index >= 0) { | |
| 1597 constantPoolHandle constants(THREAD, trap_method->constants()); | |
| 1598 load_class_by_index(constants, unloaded_class_index); | |
| 1599 } | |
| 1600 | |
| 1601 // Flush the nmethod if necessary and desirable. | |
| 1602 // | |
| 1603 // We need to avoid situations where we are re-flushing the nmethod | |
| 1604 // because of a hot deoptimization site. Repeated flushes at the same | |
| 1605 // point need to be detected by the compiler and avoided. If the compiler | |
| 1606 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
| 1607 // module must take measures to avoid an infinite cycle of recompilation | |
| 1608 // and deoptimization. There are several such measures: | |
| 1609 // | |
| 1610 // 1. If a recompilation is ordered a second time at some site X | |
| 1611 // and for the same reason R, the action is adjusted to 'reinterpret', | |
| 1612 // to give the interpreter time to exercise the method more thoroughly. | |
| 1613 // If this happens, the method's overflow_recompile_count is incremented. | |
| 1614 // | |
| 1615 // 2. If the compiler fails to reduce the deoptimization rate, then | |
| 1616 // the method's overflow_recompile_count will begin to exceed the set | |
| 1617 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
| 1618 // is adjusted to 'make_not_compilable', and the method is abandoned | |
| 1619 // to the interpreter. This is a performance hit for hot methods, | |
| 1620 // but is better than a disastrous infinite cycle of recompilations. | |
| 1621 // (Actually, only the method containing the site X is abandoned.) | |
| 1622 // | |
| 1623 // 3. In parallel with the previous measures, if the total number of | |
| 1624 // recompilations of a method exceeds the much larger set limit | |
| 1625 // PerMethodRecompilationCutoff, the method is abandoned. | |
| 1626 // This should only happen if the method is very large and has | |
| 1627 // many "lukewarm" deoptimizations. The code which enforces this | |
|
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1628 // limit is elsewhere (class nmethod, class Method). |
| 0 | 1629 // |
| 1630 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
| 1631 // to recompile at each bytecode independently of the per-BCI cutoff. | |
| 1632 // | |
| 1633 // The decision to update code is up to the compiler, and is encoded | |
| 1634 // in the Action_xxx code. If the compiler requests Action_none | |
| 1635 // no trap state is changed, no compiled code is changed, and the | |
| 1636 // computation suffers along in the interpreter. | |
| 1637 // | |
| 1638 // The other action codes specify various tactics for decompilation | |
| 1639 // and recompilation. Action_maybe_recompile is the loosest, and | |
| 1640 // allows the compiled code to stay around until enough traps are seen, | |
| 1641 // and until the compiler gets around to recompiling the trapping method. | |
| 1642 // | |
| 1643 // The other actions cause immediate removal of the present code. | |
| 1644 | |
| 1645 bool update_trap_state = true; | |
| 1646 bool make_not_entrant = false; | |
| 1647 bool make_not_compilable = false; | |
| 1783 | 1648 bool reprofile = false; |
| 0 | 1649 switch (action) { |
| 1650 case Action_none: | |
| 1651 // Keep the old code. | |
| 1652 update_trap_state = false; | |
| 1653 break; | |
| 1654 case Action_maybe_recompile: | |
| 1655 // Do not need to invalidate the present code, but we can | |
| 1656 // initiate another | |
| 1657 // Start compiler without (necessarily) invalidating the nmethod. | |
| 1658 // The system will tolerate the old code, but new code should be | |
| 1659 // generated when possible. | |
| 1660 break; | |
| 1661 case Action_reinterpret: | |
| 1662 // Go back into the interpreter for a while, and then consider | |
| 1663 // recompiling form scratch. | |
| 1664 make_not_entrant = true; | |
| 1665 // Reset invocation counter for outer most method. | |
| 1666 // This will allow the interpreter to exercise the bytecodes | |
| 1667 // for a while before recompiling. | |
| 1668 // By contrast, Action_make_not_entrant is immediate. | |
| 1669 // | |
| 1670 // Note that the compiler will track null_check, null_assert, | |
| 1671 // range_check, and class_check events and log them as if they | |
| 1672 // had been traps taken from compiled code. This will update | |
| 1673 // the MDO trap history so that the next compilation will | |
| 1674 // properly detect hot trap sites. | |
| 1783 | 1675 reprofile = true; |
| 0 | 1676 break; |
| 1677 case Action_make_not_entrant: | |
| 1678 // Request immediate recompilation, and get rid of the old code. | |
| 1679 // Make them not entrant, so next time they are called they get | |
| 1680 // recompiled. Unloaded classes are loaded now so recompile before next | |
| 1681 // time they are called. Same for uninitialized. The interpreter will | |
| 1682 // link the missing class, if any. | |
| 1683 make_not_entrant = true; | |
| 1684 break; | |
| 1685 case Action_make_not_compilable: | |
| 1686 // Give up on compiling this method at all. | |
| 1687 make_not_entrant = true; | |
| 1688 make_not_compilable = true; | |
| 1689 break; | |
| 1690 default: | |
| 1691 ShouldNotReachHere(); | |
| 1692 } | |
| 1693 | |
| 1694 // Setting +ProfileTraps fixes the following, on all platforms: | |
| 1695 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
| 1696 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
|
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1697 // recompile relies on a MethodData* to record heroic opt failures. |
| 0 | 1698 |
| 1699 // Whether the interpreter is producing MDO data or not, we also need | |
| 1700 // to use the MDO to detect hot deoptimization points and control | |
| 1701 // aggressive optimization. | |
|
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1702 bool inc_recompile_count = false; |
|
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1703 ProfileData* pdata = NULL; |
|
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1704 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
|
12356
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diff
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|
1705 assert(trap_mdo == get_method_data(thread, profiled_method, false), "sanity"); |
| 0 | 1706 uint this_trap_count = 0; |
| 1707 bool maybe_prior_trap = false; | |
| 1708 bool maybe_prior_recompile = false; | |
|
5114
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|
1709 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
|
13216
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|
1710 #ifdef GRAAL |
|
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1711 nm->is_compiled_by_graal() && nm->is_osr_method(), |
|
51e97f88c771
Profile deoptimizations of OSR methods separately.
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|
1712 #endif |
|
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|
1713 nm->method(), |
| 0 | 1714 //outputs: |
| 1715 this_trap_count, | |
| 1716 maybe_prior_trap, | |
| 1717 maybe_prior_recompile); | |
| 1718 // Because the interpreter also counts null, div0, range, and class | |
| 1719 // checks, these traps from compiled code are double-counted. | |
| 1720 // This is harmless; it just means that the PerXTrapLimit values | |
| 1721 // are in effect a little smaller than they look. | |
| 1722 | |
| 1723 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
| 1724 if (per_bc_reason != Reason_none) { | |
| 1725 // Now take action based on the partially known per-BCI history. | |
| 1726 if (maybe_prior_trap | |
| 1727 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
| 1728 // If there are too many traps at this BCI, force a recompile. | |
| 1729 // This will allow the compiler to see the limit overflow, and | |
| 1730 // take corrective action, if possible. The compiler generally | |
| 1731 // does not use the exact PerBytecodeTrapLimit value, but instead | |
| 1732 // changes its tactics if it sees any traps at all. This provides | |
| 1733 // a little hysteresis, delaying a recompile until a trap happens | |
| 1734 // several times. | |
| 1735 // | |
| 1736 // Actually, since there is only one bit of counter per BCI, | |
| 1737 // the possible per-BCI counts are {0,1,(per-method count)}. | |
| 1738 // This produces accurate results if in fact there is only | |
| 1739 // one hot trap site, but begins to get fuzzy if there are | |
| 1740 // many sites. For example, if there are ten sites each | |
| 1741 // trapping two or more times, they each get the blame for | |
| 1742 // all of their traps. | |
| 1743 make_not_entrant = true; | |
| 1744 } | |
| 1745 | |
| 1746 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
| 1747 if (make_not_entrant && maybe_prior_recompile) { | |
| 1748 // More than one recompile at this point. | |
|
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1749 inc_recompile_count = maybe_prior_trap; |
| 0 | 1750 } |
| 1751 } else { | |
| 1752 // For reasons which are not recorded per-bytecode, we simply | |
| 1753 // force recompiles unconditionally. | |
| 1754 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
| 1755 make_not_entrant = true; | |
| 1756 } | |
| 1757 | |
| 1758 // Go back to the compiler if there are too many traps in this method. | |
|
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1759 if (this_trap_count >= per_method_trap_limit(reason)) { |
| 0 | 1760 // If there are too many traps in this method, force a recompile. |
| 1761 // This will allow the compiler to see the limit overflow, and | |
| 1762 // take corrective action, if possible. | |
| 1763 // (This condition is an unlikely backstop only, because the | |
| 1764 // PerBytecodeTrapLimit is more likely to take effect first, | |
| 1765 // if it is applicable.) | |
| 1766 make_not_entrant = true; | |
| 1767 } | |
| 1768 | |
| 1769 // Here's more hysteresis: If there has been a recompile at | |
| 1770 // this trap point already, run the method in the interpreter | |
| 1771 // for a while to exercise it more thoroughly. | |
| 1772 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
| 1783 | 1773 reprofile = true; |
| 0 | 1774 } |
| 1775 | |
|
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1776 } |
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1777 |
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1778 // Take requested actions on the method: |
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1779 |
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1780 // Recompile |
|
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1781 if (make_not_entrant) { |
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1782 if (!nm->make_not_entrant()) { |
|
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1783 return; // the call did not change nmethod's state |
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1784 } |
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1785 |
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1786 if (pdata != NULL) { |
| 0 | 1787 // Record the recompilation event, if any. |
| 1788 int tstate0 = pdata->trap_state(); | |
| 1789 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
| 1790 if (tstate1 != tstate0) | |
| 1791 pdata->set_trap_state(tstate1); | |
| 1792 } | |
| 17780 | 1793 |
| 1794 #if INCLUDE_RTM_OPT | |
| 1795 // Restart collecting RTM locking abort statistic if the method | |
| 1796 // is recompiled for a reason other than RTM state change. | |
| 1797 // Assume that in new recompiled code the statistic could be different, | |
| 1798 // for example, due to different inlining. | |
| 1799 if ((reason != Reason_rtm_state_change) && (trap_mdo != NULL) && | |
| 1800 UseRTMDeopt && (nm->rtm_state() != ProfileRTM)) { | |
| 1801 trap_mdo->atomic_set_rtm_state(ProfileRTM); | |
| 1802 } | |
| 1803 #endif | |
| 0 | 1804 } |
| 1805 | |
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1806 if (inc_recompile_count) { |
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1807 trap_mdo->inc_overflow_recompile_count(); |
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1808 if ((uint)trap_mdo->overflow_recompile_count() > |
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1809 (uint)PerBytecodeRecompilationCutoff) { |
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1810 // Give up on the method containing the bad BCI. |
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1811 if (trap_method() == nm->method()) { |
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1812 make_not_compilable = true; |
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1813 } else { |
| 7998 | 1814 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
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1815 // But give grace to the enclosing nm->method(). |
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1816 } |
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1817 } |
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1818 } |
| 0 | 1819 |
| 1783 | 1820 // Reprofile |
| 1821 if (reprofile) { | |
| 1822 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
| 0 | 1823 } |
| 1824 | |
| 1825 // Give up compiling | |
| 1783 | 1826 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
| 0 | 1827 assert(make_not_entrant, "consistent"); |
| 1783 | 1828 nm->method()->set_not_compilable(CompLevel_full_optimization); |
| 0 | 1829 } |
| 1830 | |
| 1831 } // Free marked resources | |
| 1832 | |
| 1833 } | |
| 1834 JRT_END | |
| 1835 | |
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1836 MethodData* |
| 0 | 1837 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
| 1838 bool create_if_missing) { | |
| 1839 Thread* THREAD = thread; | |
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1840 MethodData* mdo = m()->method_data(); |
| 0 | 1841 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
| 1842 // Build an MDO. Ignore errors like OutOfMemory; | |
| 1843 // that simply means we won't have an MDO to update. | |
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1844 Method::build_interpreter_method_data(m, THREAD); |
| 0 | 1845 if (HAS_PENDING_EXCEPTION) { |
| 1846 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
| 1847 CLEAR_PENDING_EXCEPTION; | |
| 1848 } | |
| 1849 mdo = m()->method_data(); | |
| 1850 } | |
| 1851 return mdo; | |
| 1852 } | |
| 1853 | |
| 1854 ProfileData* | |
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1855 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
| 0 | 1856 int trap_bci, |
| 1857 Deoptimization::DeoptReason reason, | |
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1858 bool update_total_trap_count, |
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1859 #ifdef GRAAL |
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1860 bool is_osr, |
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1861 #endif |
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1862 Method* compiled_method, |
| 0 | 1863 //outputs: |
| 1864 uint& ret_this_trap_count, | |
| 1865 bool& ret_maybe_prior_trap, | |
| 1866 bool& ret_maybe_prior_recompile) { | |
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1867 bool maybe_prior_trap = false; |
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1868 bool maybe_prior_recompile = false; |
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1869 uint this_trap_count = 0; |
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1870 if (update_total_trap_count) { |
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1871 uint idx = reason; |
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1872 #ifdef GRAAL |
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1873 if (is_osr) { |
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1874 idx += Reason_LIMIT; |
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1875 } |
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1876 #endif |
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1877 uint prior_trap_count = trap_mdo->trap_count(idx); |
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1878 this_trap_count = trap_mdo->inc_trap_count(idx); |
| 0 | 1879 |
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1880 // If the runtime cannot find a place to store trap history, |
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1881 // it is estimated based on the general condition of the method. |
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1882 // If the method has ever been recompiled, or has ever incurred |
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1883 // a trap with the present reason , then this BCI is assumed |
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1884 // (pessimistically) to be the culprit. |
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1885 maybe_prior_trap = (prior_trap_count != 0); |
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1886 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1887 } |
| 0 | 1888 ProfileData* pdata = NULL; |
| 1889 | |
| 1890 | |
| 1891 // For reasons which are recorded per bytecode, we check per-BCI data. | |
| 1892 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
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1893 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
| 0 | 1894 if (per_bc_reason != Reason_none) { |
| 1895 // Find the profile data for this BCI. If there isn't one, | |
| 1896 // try to allocate one from the MDO's set of spares. | |
| 1897 // This will let us detect a repeated trap at this point. | |
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1898 pdata = trap_mdo->allocate_bci_to_data(trap_bci, reason_is_speculate(reason) ? compiled_method : NULL); |
| 0 | 1899 |
| 1900 if (pdata != NULL) { | |
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1901 if (reason_is_speculate(reason) && !pdata->is_SpeculativeTrapData()) { |
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1902 if (LogCompilation && xtty != NULL) { |
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1903 ttyLocker ttyl; |
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1904 // no more room for speculative traps in this MDO |
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1905 xtty->elem("speculative_traps_oom"); |
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1906 } |
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1907 } |
| 0 | 1908 // Query the trap state of this profile datum. |
| 1909 int tstate0 = pdata->trap_state(); | |
| 1910 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
| 1911 maybe_prior_trap = false; | |
| 1912 if (!trap_state_is_recompiled(tstate0)) | |
| 1913 maybe_prior_recompile = false; | |
| 1914 | |
| 1915 // Update the trap state of this profile datum. | |
| 1916 int tstate1 = tstate0; | |
| 1917 // Record the reason. | |
| 1918 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
| 1919 // Store the updated state on the MDO, for next time. | |
| 1920 if (tstate1 != tstate0) | |
| 1921 pdata->set_trap_state(tstate1); | |
| 1922 } else { | |
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1923 if (LogCompilation && xtty != NULL) { |
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1924 ttyLocker ttyl; |
| 0 | 1925 // Missing MDP? Leave a small complaint in the log. |
| 1926 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1927 } |
| 0 | 1928 } |
| 1929 } | |
| 1930 | |
| 1931 // Return results: | |
| 1932 ret_this_trap_count = this_trap_count; | |
| 1933 ret_maybe_prior_trap = maybe_prior_trap; | |
| 1934 ret_maybe_prior_recompile = maybe_prior_recompile; | |
| 1935 return pdata; | |
| 1936 } | |
| 1937 | |
| 1938 void | |
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1939 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 0 | 1940 ResourceMark rm; |
| 1941 // Ignored outputs: | |
| 1942 uint ignore_this_trap_count; | |
| 1943 bool ignore_maybe_prior_trap; | |
| 1944 bool ignore_maybe_prior_recompile; | |
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1945 assert(!reason_is_speculate(reason), "reason speculate only used by compiler"); |
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1946 // Graal uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
| 5130 | 1947 bool update_total_counts = GRAAL_ONLY(false) NOT_GRAAL(true); |
| 0 | 1948 query_update_method_data(trap_mdo, trap_bci, |
| 1949 (DeoptReason)reason, | |
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1950 update_total_counts, |
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1951 #ifdef GRAAL |
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1952 false, |
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1953 #endif |
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1954 NULL, |
| 0 | 1955 ignore_this_trap_count, |
| 1956 ignore_maybe_prior_trap, | |
| 1957 ignore_maybe_prior_recompile); | |
| 1958 } | |
| 1959 | |
| 1960 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) { | |
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1961 if (TraceDeoptimization) { |
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1962 tty->print("Uncommon trap "); |
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1963 } |
| 0 | 1964 // Still in Java no safepoints |
| 1965 { | |
| 1966 // This enters VM and may safepoint | |
| 1967 uncommon_trap_inner(thread, trap_request); | |
| 1968 } | |
| 1969 return fetch_unroll_info_helper(thread); | |
| 1970 } | |
| 1971 | |
| 1972 // Local derived constants. | |
| 1973 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
| 1974 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
| 1975 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
| 1976 | |
| 1977 //---------------------------trap_state_reason--------------------------------- | |
| 1978 Deoptimization::DeoptReason | |
| 1979 Deoptimization::trap_state_reason(int trap_state) { | |
| 1980 // This assert provides the link between the width of DataLayout::trap_bits | |
| 1981 // and the encoding of "recorded" reasons. It ensures there are enough | |
| 1982 // bits to store all needed reasons in the per-BCI MDO profile. | |
| 1983 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
| 1984 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 1985 trap_state -= recompile_bit; | |
| 1986 if (trap_state == DS_REASON_MASK) { | |
| 1987 return Reason_many; | |
| 1988 } else { | |
| 1989 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
| 1990 return (DeoptReason)trap_state; | |
| 1991 } | |
| 1992 } | |
| 1993 //-------------------------trap_state_has_reason------------------------------- | |
| 1994 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
| 1995 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
| 1996 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
| 1997 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 1998 trap_state -= recompile_bit; | |
| 1999 if (trap_state == DS_REASON_MASK) { | |
| 2000 return -1; // true, unspecifically (bottom of state lattice) | |
| 2001 } else if (trap_state == reason) { | |
| 2002 return 1; // true, definitely | |
| 2003 } else if (trap_state == 0) { | |
| 2004 return 0; // false, definitely (top of state lattice) | |
| 2005 } else { | |
| 2006 return 0; // false, definitely | |
| 2007 } | |
| 2008 } | |
| 2009 //-------------------------trap_state_add_reason------------------------------- | |
| 2010 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
| 2011 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
| 2012 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 2013 trap_state -= recompile_bit; | |
| 2014 if (trap_state == DS_REASON_MASK) { | |
| 2015 return trap_state + recompile_bit; // already at state lattice bottom | |
| 2016 } else if (trap_state == reason) { | |
| 2017 return trap_state + recompile_bit; // the condition is already true | |
| 2018 } else if (trap_state == 0) { | |
| 2019 return reason + recompile_bit; // no condition has yet been true | |
| 2020 } else { | |
| 2021 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
| 2022 } | |
| 2023 } | |
| 2024 //-----------------------trap_state_is_recompiled------------------------------ | |
| 2025 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
| 2026 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
| 2027 } | |
| 2028 //-----------------------trap_state_set_recompiled----------------------------- | |
| 2029 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
| 2030 if (z) return trap_state | DS_RECOMPILE_BIT; | |
| 2031 else return trap_state & ~DS_RECOMPILE_BIT; | |
| 2032 } | |
| 2033 //---------------------------format_trap_state--------------------------------- | |
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2034 // This is used for debugging and diagnostics, including LogFile output. |
| 0 | 2035 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
| 2036 int trap_state) { | |
| 2037 DeoptReason reason = trap_state_reason(trap_state); | |
| 2038 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
| 2039 // Re-encode the state from its decoded components. | |
| 2040 int decoded_state = 0; | |
| 2041 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
| 2042 decoded_state = trap_state_add_reason(decoded_state, reason); | |
| 2043 if (recomp_flag) | |
| 2044 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
| 2045 // If the state re-encodes properly, format it symbolically. | |
| 2046 // Because this routine is used for debugging and diagnostics, | |
| 2047 // be robust even if the state is a strange value. | |
| 2048 size_t len; | |
| 2049 if (decoded_state != trap_state) { | |
| 2050 // Random buggy state that doesn't decode?? | |
| 2051 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
| 2052 } else { | |
| 2053 len = jio_snprintf(buf, buflen, "%s%s", | |
| 2054 trap_reason_name(reason), | |
| 2055 recomp_flag ? " recompiled" : ""); | |
| 2056 } | |
| 2057 if (len >= buflen) | |
| 2058 buf[buflen-1] = '\0'; | |
| 2059 return buf; | |
| 2060 } | |
| 2061 | |
| 2062 | |
| 2063 //--------------------------------statics-------------------------------------- | |
| 2064 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
| 2065 = Deoptimization::Action_reinterpret; | |
| 2066 const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = { | |
| 2067 // Note: Keep this in sync. with enum DeoptReason. | |
| 2068 "none", | |
| 2069 "null_check", | |
|
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2070 "null_assert" GRAAL_ONLY("_or_unreached0"), |
| 0 | 2071 "range_check", |
| 2072 "class_check", | |
| 2073 "array_check", | |
|
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2074 "intrinsic" GRAAL_ONLY("_or_type_checked_inlining"), |
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2075 "bimorphic" GRAAL_ONLY("_or_optimized_type_check"), |
| 0 | 2076 "unloaded", |
|
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2077 "uninitialized" GRAAL_ONLY("_or_unresolved"), |
| 0 | 2078 "unreached", |
|
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2079 "unhandled" GRAAL_ONLY("_or_not_compiled_exception_handler"), |
| 0 | 2080 "constraint", |
| 2081 "div0_check", | |
|
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2082 "age" GRAAL_ONLY("_or_jsr_mismatch"), |
| 3345 | 2083 "predicate", |
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2084 "loop_limit_check", |
| 17780 | 2085 "speculate_class_check", |
| 2086 "rtm_state_change" | |
|
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2087 #ifdef GRAAL |
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2088 "aliasing", |
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2089 "transfer_to_interpreter", |
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2090 #endif |
| 0 | 2091 }; |
| 2092 const char* Deoptimization::_trap_action_name[Action_LIMIT] = { | |
| 2093 // Note: Keep this in sync. with enum DeoptAction. | |
| 2094 "none", | |
| 2095 "maybe_recompile", | |
| 2096 "reinterpret", | |
| 2097 "make_not_entrant", | |
| 2098 "make_not_compilable" | |
| 2099 }; | |
| 2100 | |
| 2101 const char* Deoptimization::trap_reason_name(int reason) { | |
| 2102 if (reason == Reason_many) return "many"; | |
| 2103 if ((uint)reason < Reason_LIMIT) | |
| 2104 return _trap_reason_name[reason]; | |
| 2105 static char buf[20]; | |
| 2106 sprintf(buf, "reason%d", reason); | |
| 2107 return buf; | |
| 2108 } | |
| 2109 const char* Deoptimization::trap_action_name(int action) { | |
| 2110 if ((uint)action < Action_LIMIT) | |
| 2111 return _trap_action_name[action]; | |
| 2112 static char buf[20]; | |
| 2113 sprintf(buf, "action%d", action); | |
| 2114 return buf; | |
| 2115 } | |
| 2116 | |
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2117 // This is used for debugging and diagnostics, including LogFile output. |
| 0 | 2118 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, |
| 2119 int trap_request) { | |
| 2120 jint unloaded_class_index = trap_request_index(trap_request); | |
| 2121 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
| 2122 const char* action = trap_action_name(trap_request_action(trap_request)); | |
|
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2123 #ifdef GRAAL |
|
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2124 int debug_id = trap_request_debug_id(trap_request); |
|
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2125 #endif |
| 0 | 2126 size_t len; |
| 2127 if (unloaded_class_index < 0) { | |
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2128 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" GRAAL_ONLY(" debug_id='%d'"), |
|
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2129 reason, action |
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2130 #ifdef GRAAL |
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2131 ,debug_id |
|
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2132 #endif |
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2133 ); |
| 0 | 2134 } else { |
|
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2135 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" GRAAL_ONLY(" debug_id='%d'"), |
|
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2136 reason, action, unloaded_class_index |
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2137 #ifdef GRAAL |
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2138 ,debug_id |
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2139 #endif |
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2140 ); |
| 0 | 2141 } |
| 2142 if (len >= buflen) | |
| 2143 buf[buflen-1] = '\0'; | |
| 2144 return buf; | |
| 2145 } | |
| 2146 | |
| 2147 juint Deoptimization::_deoptimization_hist | |
| 2148 [Deoptimization::Reason_LIMIT] | |
| 2149 [1 + Deoptimization::Action_LIMIT] | |
| 2150 [Deoptimization::BC_CASE_LIMIT] | |
| 2151 = {0}; | |
| 2152 | |
| 2153 enum { | |
| 2154 LSB_BITS = 8, | |
| 2155 LSB_MASK = right_n_bits(LSB_BITS) | |
| 2156 }; | |
| 2157 | |
| 2158 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
| 2159 Bytecodes::Code bc) { | |
| 2160 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
| 2161 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
| 2162 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
| 2163 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
| 2164 juint* cases = _deoptimization_hist[reason][1+action]; | |
| 2165 juint* bc_counter_addr = NULL; | |
| 2166 juint bc_counter = 0; | |
| 2167 // Look for an unused counter, or an exact match to this BC. | |
| 2168 if (bc != Bytecodes::_illegal) { | |
| 2169 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
| 2170 juint* counter_addr = &cases[bc_case]; | |
| 2171 juint counter = *counter_addr; | |
| 2172 if ((counter == 0 && bc_counter_addr == NULL) | |
| 2173 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
| 2174 // this counter is either free or is already devoted to this BC | |
| 2175 bc_counter_addr = counter_addr; | |
| 2176 bc_counter = counter | bc; | |
| 2177 } | |
| 2178 } | |
| 2179 } | |
| 2180 if (bc_counter_addr == NULL) { | |
| 2181 // Overflow, or no given bytecode. | |
| 2182 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
| 2183 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
| 2184 } | |
| 2185 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
| 2186 } | |
| 2187 | |
| 2188 jint Deoptimization::total_deoptimization_count() { | |
| 2189 return _deoptimization_hist[Reason_none][0][0]; | |
| 2190 } | |
| 2191 | |
| 2192 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
| 2193 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
| 2194 return _deoptimization_hist[reason][0][0]; | |
| 2195 } | |
| 2196 | |
| 2197 void Deoptimization::print_statistics() { | |
| 2198 juint total = total_deoptimization_count(); | |
| 2199 juint account = total; | |
| 2200 if (total != 0) { | |
| 2201 ttyLocker ttyl; | |
| 2202 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
| 2203 tty->print_cr("Deoptimization traps recorded:"); | |
| 2204 #define PRINT_STAT_LINE(name, r) \ | |
| 2205 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
| 2206 PRINT_STAT_LINE("total", total); | |
| 2207 // For each non-zero entry in the histogram, print the reason, | |
| 2208 // the action, and (if specifically known) the type of bytecode. | |
| 2209 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
| 2210 for (int action = 0; action < Action_LIMIT; action++) { | |
| 2211 juint* cases = _deoptimization_hist[reason][1+action]; | |
| 2212 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
| 2213 juint counter = cases[bc_case]; | |
| 2214 if (counter != 0) { | |
| 2215 char name[1*K]; | |
| 2216 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
| 2217 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
| 2218 bc = Bytecodes::_illegal; | |
| 2219 sprintf(name, "%s/%s/%s", | |
| 2220 trap_reason_name(reason), | |
| 2221 trap_action_name(action), | |
| 2222 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
| 2223 juint r = counter >> LSB_BITS; | |
| 2224 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
| 2225 account -= r; | |
| 2226 } | |
| 2227 } | |
| 2228 } | |
| 2229 } | |
| 2230 if (account != 0) { | |
| 2231 PRINT_STAT_LINE("unaccounted", account); | |
| 2232 } | |
| 2233 #undef PRINT_STAT_LINE | |
| 2234 if (xtty != NULL) xtty->tail("statistics"); | |
| 2235 } | |
| 2236 } | |
|
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2237 #else // COMPILER2 || SHARK || GRAAL |
| 0 | 2238 |
| 2239 | |
| 2240 // Stubs for C1 only system. | |
| 2241 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
| 2242 return false; | |
| 2243 } | |
| 2244 | |
| 2245 const char* Deoptimization::trap_reason_name(int reason) { | |
| 2246 return "unknown"; | |
| 2247 } | |
| 2248 | |
| 2249 void Deoptimization::print_statistics() { | |
| 2250 // no output | |
| 2251 } | |
| 2252 | |
| 2253 void | |
|
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2254 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 0 | 2255 // no udpate |
| 2256 } | |
| 2257 | |
| 2258 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
| 2259 return 0; | |
| 2260 } | |
| 2261 | |
| 2262 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
| 2263 Bytecodes::Code bc) { | |
| 2264 // no update | |
| 2265 } | |
| 2266 | |
| 2267 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
| 2268 int trap_state) { | |
| 2269 jio_snprintf(buf, buflen, "#%d", trap_state); | |
| 2270 return buf; | |
| 2271 } | |
| 2272 | |
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2273 #endif // COMPILER2 || SHARK || GRAAL |