Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/deoptimization.cpp @ 22699:ea58bbafd5b9
Move SpeculationLog implementation to HotSpotSpeculationLog, because it is not useful for other VMs
| author | Christian Wimmer <christian.wimmer@oracle.com> |
|---|---|
| date | Wed, 21 Oct 2015 09:06:12 -0700 |
| parents | a7114a5e69e1 |
| children | 6832e10a0b97 |
| 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 |
| 22298 | 95 #if INCLUDE_JVMCI |
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96 #include "jvmci/jvmciRuntime.hpp" |
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97 #include "jvmci/jvmciJavaClasses.hpp" |
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98 #endif |
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99 |
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100 |
| 0 | 101 bool DeoptimizationMarker::_is_active = false; |
| 102 | |
| 103 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
| 104 int caller_adjustment, | |
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105 int caller_actual_parameters, |
| 0 | 106 int number_of_frames, |
| 107 intptr_t* frame_sizes, | |
| 108 address* frame_pcs, | |
| 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()); |
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208 bool skip_internal = thread->deopt_nmethod() != NULL && !thread->deopt_nmethod()->compiler()->is_jvmci(); |
| 0 | 209 |
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210 if (VerifyStack) { |
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211 thread->validate_frame_layout(); |
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212 } |
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213 |
| 0 | 214 // Create a growable array of VFrames where each VFrame represents an inlined |
| 215 // Java frame. This storage is allocated with the usual system arena. | |
| 216 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
| 217 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); | |
| 218 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
| 219 while (!vf->is_top()) { | |
| 220 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
| 221 chunk->push(compiledVFrame::cast(vf)); | |
| 222 vf = vf->sender(); | |
| 223 } | |
| 224 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
| 225 chunk->push(compiledVFrame::cast(vf)); | |
| 226 | |
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227 bool realloc_failures = false; |
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228 |
| 22298 | 229 #if defined(COMPILER2) || INCLUDE_JVMCI |
| 0 | 230 // Reallocate the non-escaping objects and restore their fields. Then |
| 231 // relock objects if synchronization on them was eliminated. | |
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232 #ifndef INCLUDE_JVMCI |
| 4777 | 233 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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234 if (EliminateAllocations) { |
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235 #endif // INCLUDE_JVMCI |
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236 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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237 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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238 |
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239 // The flag return_oop() indicates call sites which return oop |
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240 // in compiled code. Such sites include java method calls, |
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241 // runtime calls (for example, used to allocate new objects/arrays |
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242 // on slow code path) and any other calls generated in compiled code. |
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243 // It is not guaranteed that we can get such information here only |
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244 // by analyzing bytecode in deoptimized frames. This is why this flag |
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245 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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246 // If the previous frame was popped, we don't have a result. |
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247 bool save_oop_result = chunk->at(0)->scope()->return_oop() && !thread->popframe_forcing_deopt_reexecution(); |
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248 Handle return_value; |
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249 if (save_oop_result) { |
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250 // Reallocation may trigger GC. If deoptimization happened on return from |
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251 // call which returns oop we need to save it since it is not in oopmap. |
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252 oop result = deoptee.saved_oop_result(&map); |
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253 assert(result == NULL || result->is_oop(), "must be oop"); |
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254 return_value = Handle(thread, result); |
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255 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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256 if (TraceDeoptimization) { |
| 6843 | 257 ttyLocker ttyl; |
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258 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, (void *)result, thread); |
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259 } |
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260 } |
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261 if (objects != NULL) { |
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262 JRT_BLOCK |
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263 realloc_failures = realloc_objects(thread, &deoptee, objects, THREAD); |
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264 JRT_END |
|
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265 reassign_fields(&deoptee, &map, objects, realloc_failures, skip_internal); |
|
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266 #ifndef PRODUCT |
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267 if (TraceDeoptimization) { |
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268 ttyLocker ttyl; |
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269 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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270 print_objects(objects, realloc_failures); |
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271 } |
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272 #endif |
| 0 | 273 } |
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274 if (save_oop_result) { |
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275 // Restore result. |
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276 deoptee.set_saved_oop_result(&map, return_value()); |
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277 } |
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278 #ifndef INCLUDE_JVMCI |
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279 } |
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280 if (EliminateLocks) { |
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281 #endif // INCLUDE_JVMCI |
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282 #ifndef PRODUCT |
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283 bool first = true; |
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284 #endif |
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285 for (int i = 0; i < chunk->length(); i++) { |
|
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286 compiledVFrame* cvf = chunk->at(i); |
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287 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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288 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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289 if (monitors->is_nonempty()) { |
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290 relock_objects(monitors, thread, realloc_failures); |
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291 #ifndef PRODUCT |
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292 if (PrintDeoptimizationDetails) { |
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293 ttyLocker ttyl; |
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294 for (int j = 0; j < monitors->length(); j++) { |
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295 MonitorInfo* mi = monitors->at(j); |
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296 if (mi->eliminated()) { |
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297 if (first) { |
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298 first = false; |
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299 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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300 } |
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301 if (mi->owner_is_scalar_replaced()) { |
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302 Klass* k = java_lang_Class::as_Klass(mi->owner_klass()); |
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303 tty->print_cr(" failed reallocation for klass %s", k->external_name()); |
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304 } else { |
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305 tty->print_cr(" object <" INTPTR_FORMAT "> locked", (void *)mi->owner()); |
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306 } |
|
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307 } |
| 0 | 308 } |
| 309 } | |
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310 #endif |
| 0 | 311 } |
| 312 } | |
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313 #ifndef INCLUDE_JVMCI |
| 0 | 314 } |
| 315 } | |
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316 #endif // INCLUDE_JVMCI |
| 22298 | 317 #endif // COMPILER2 || INCLUDE_JVMCI |
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318 |
| 0 | 319 // Ensure that no safepoint is taken after pointers have been stored |
| 320 // in fields of rematerialized objects. If a safepoint occurs from here on | |
| 321 // out the java state residing in the vframeArray will be missed. | |
| 322 No_Safepoint_Verifier no_safepoint; | |
| 323 | |
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324 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk, realloc_failures); |
| 22298 | 325 #if defined(COMPILER2) || INCLUDE_JVMCI |
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326 if (realloc_failures) { |
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327 pop_frames_failed_reallocs(thread, array); |
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328 } |
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329 #endif |
| 0 | 330 |
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331 assert(thread->vframe_array_head() == NULL, "Pending deopt!"); |
| 0 | 332 thread->set_vframe_array_head(array); |
| 333 | |
| 334 // Now that the vframeArray has been created if we have any deferred local writes | |
| 335 // added by jvmti then we can free up that structure as the data is now in the | |
| 336 // vframeArray | |
| 337 | |
| 338 if (thread->deferred_locals() != NULL) { | |
| 339 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
| 340 int i = 0; | |
| 341 do { | |
| 342 // Because of inlining we could have multiple vframes for a single frame | |
| 343 // and several of the vframes could have deferred writes. Find them all. | |
| 344 if (list->at(i)->id() == array->original().id()) { | |
| 345 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
| 346 list->remove_at(i); | |
| 347 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
| 348 delete dlv; | |
| 349 } else { | |
| 350 i++; | |
| 351 } | |
| 352 } while ( i < list->length() ); | |
| 353 if (list->length() == 0) { | |
| 354 thread->set_deferred_locals(NULL); | |
| 355 // free the list and elements back to C heap. | |
| 356 delete list; | |
| 357 } | |
| 358 | |
| 359 } | |
| 360 | |
| 1692 | 361 #ifndef SHARK |
| 0 | 362 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
| 363 CodeBlob* cb = stub_frame.cb(); | |
| 364 // Verify we have the right vframeArray | |
| 365 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
| 366 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
| 367 | |
| 1204 | 368 // If the deopt call site is a MethodHandle invoke call site we have |
| 369 // to adjust the unpack_sp. | |
| 370 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
| 371 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
| 372 unpack_sp = deoptee.unextended_sp(); | |
| 373 | |
| 0 | 374 #ifdef ASSERT |
| 15104 | 375 assert(cb->is_deoptimization_stub() || |
| 376 cb->is_uncommon_trap_stub() || | |
|
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377 strcmp("Stub<DeoptimizationStub.deoptimizationHandler>", cb->name()) == 0 || |
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378 strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>", cb->name()) == 0, |
| 15104 | 379 err_msg("unexpected code blob: %s", cb->name())); |
| 0 | 380 #endif |
| 1692 | 381 #else |
| 382 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
| 383 #endif // !SHARK | |
| 384 | |
| 0 | 385 // This is a guarantee instead of an assert because if vframe doesn't match |
| 386 // we will unpack the wrong deoptimized frame and wind up in strange places | |
| 387 // where it will be very difficult to figure out what went wrong. Better | |
| 388 // to die an early death here than some very obscure death later when the | |
| 389 // trail is cold. | |
| 390 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
| 391 // in that it will fail to detect a problem when there is one. This needs | |
| 392 // more work in tiger timeframe. | |
| 393 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
| 394 | |
| 395 int number_of_frames = array->frames(); | |
| 396 | |
| 397 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
| 398 // virtual activation, which is the reverse of the elements in the vframes array. | |
| 6197 | 399 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
| 0 | 400 // +1 because we always have an interpreter return address for the final slot. |
| 6197 | 401 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
| 0 | 402 int popframe_extra_args = 0; |
| 403 // Create an interpreter return address for the stub to use as its return | |
| 404 // address so the skeletal frames are perfectly walkable | |
| 405 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
| 406 | |
| 407 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
| 408 // activation be put back on the expression stack of the caller for reexecution | |
| 409 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
| 410 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
| 411 } | |
| 412 | |
|
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413 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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414 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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415 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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416 // |
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417 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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418 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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419 |
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420 // It's possible that the number of paramters at the call site is |
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421 // different than number of arguments in the callee when method |
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422 // handles are used. If the caller is interpreted get the real |
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423 // value so that the proper amount of space can be added to it's |
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424 // frame. |
|
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425 bool caller_was_method_handle = false; |
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426 if (deopt_sender.is_interpreted_frame()) { |
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427 methodHandle method = deopt_sender.interpreter_frame_method(); |
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428 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
|
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429 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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430 // Method handle invokes may involve fairly arbitrary chains of |
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431 // calls so it's impossible to know how much actual space the |
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432 // caller has for locals. |
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433 caller_was_method_handle = true; |
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434 } |
|
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435 } |
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436 |
| 0 | 437 // |
| 438 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
| 439 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
| 440 // frame_sizes/frame_pcs[n] youngest frame (int) | |
| 441 // | |
| 442 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
| 443 // owns the space for the return address to it's caller). Confusing ain't it. | |
| 444 // | |
| 445 // The vframe array can address vframes with indices running from | |
| 446 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
| 447 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
| 448 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
| 449 // so things look a little strange in this loop. | |
| 450 // | |
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451 int callee_parameters = 0; |
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452 int callee_locals = 0; |
| 0 | 453 for (int index = 0; index < array->frames(); index++ ) { |
| 454 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
| 455 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
| 456 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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457 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(callee_parameters, |
| 0 | 458 callee_locals, |
| 459 index == 0, | |
| 460 popframe_extra_args); | |
| 461 // This pc doesn't have to be perfect just good enough to identify the frame | |
| 462 // as interpreted so the skeleton frame will be walkable | |
| 463 // The correct pc will be set when the skeleton frame is completely filled out | |
| 464 // The final pc we store in the loop is wrong and will be overwritten below | |
| 465 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
| 466 | |
| 467 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
| 468 callee_locals = array->element(index)->method()->max_locals(); | |
| 469 popframe_extra_args = 0; | |
| 470 } | |
| 471 | |
| 472 // Compute whether the root vframe returns a float or double value. | |
| 473 BasicType return_type; | |
| 474 { | |
| 475 HandleMark hm; | |
| 476 methodHandle method(thread, array->element(0)->method()); | |
| 2142 | 477 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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478 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
| 0 | 479 } |
| 480 | |
| 481 // Compute information for handling adapters and adjusting the frame size of the caller. | |
| 482 int caller_adjustment = 0; | |
| 483 | |
| 484 // Compute the amount the oldest interpreter frame will have to adjust | |
| 485 // its caller's stack by. If the caller is a compiled frame then | |
| 486 // we pretend that the callee has no parameters so that the | |
| 487 // extension counts for the full amount of locals and not just | |
| 488 // locals-parms. This is because without a c2i adapter the parm | |
| 489 // area as created by the compiled frame will not be usable by | |
| 490 // the interpreter. (Depending on the calling convention there | |
| 491 // may not even be enough space). | |
| 492 | |
| 493 // QQQ I'd rather see this pushed down into last_frame_adjust | |
| 494 // and have it take the sender (aka caller). | |
| 495 | |
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496 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
| 0 | 497 caller_adjustment = last_frame_adjust(0, callee_locals); |
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498 } else if (callee_locals > callee_parameters) { |
| 0 | 499 // The caller frame may need extending to accommodate |
| 500 // non-parameter locals of the first unpacked interpreted frame. | |
| 501 // Compute that adjustment. | |
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502 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
| 0 | 503 } |
| 504 | |
| 505 // If the sender is deoptimized the we must retrieve the address of the handler | |
| 506 // since the frame will "magically" show the original pc before the deopt | |
| 507 // and we'd undo the deopt. | |
| 508 | |
| 509 frame_pcs[0] = deopt_sender.raw_pc(); | |
| 510 | |
| 1692 | 511 #ifndef SHARK |
| 0 | 512 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
| 1692 | 513 #endif // SHARK |
| 0 | 514 |
| 515 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, | |
| 516 caller_adjustment * BytesPerWord, | |
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517 caller_was_method_handle ? 0 : callee_parameters, |
| 0 | 518 number_of_frames, |
| 519 frame_sizes, | |
| 520 frame_pcs, | |
| 521 return_type); | |
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522 // On some platforms, we need a way to pass some platform dependent |
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523 // information to the unpacking code so the skeletal frames come out |
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524 // correct (initial fp value, unextended sp, ...) |
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525 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
| 0 | 526 |
| 527 if (array->frames() > 1) { | |
| 528 if (VerifyStack && TraceDeoptimization) { | |
| 6843 | 529 ttyLocker ttyl; |
| 0 | 530 tty->print_cr("Deoptimizing method containing inlining"); |
| 531 } | |
| 532 } | |
| 533 | |
| 534 array->set_unroll_block(info); | |
| 535 return info; | |
| 536 } | |
| 537 | |
| 538 // Called to cleanup deoptimization data structures in normal case | |
| 539 // after unpacking to stack and when stack overflow error occurs | |
| 540 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
| 541 vframeArray *array) { | |
| 542 | |
| 543 // Get array if coming from exception | |
| 544 if (array == NULL) { | |
| 545 array = thread->vframe_array_head(); | |
| 546 } | |
| 547 thread->set_vframe_array_head(NULL); | |
| 548 | |
| 549 // Free the previous UnrollBlock | |
| 550 vframeArray* old_array = thread->vframe_array_last(); | |
| 551 thread->set_vframe_array_last(array); | |
| 552 | |
| 553 if (old_array != NULL) { | |
| 554 UnrollBlock* old_info = old_array->unroll_block(); | |
| 555 old_array->set_unroll_block(NULL); | |
| 556 delete old_info; | |
| 557 delete old_array; | |
| 558 } | |
| 559 | |
| 560 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
| 561 // inside the vframeArray (StackValueCollections) | |
| 562 | |
| 563 delete thread->deopt_mark(); | |
| 564 thread->set_deopt_mark(NULL); | |
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565 thread->set_deopt_nmethod(NULL); |
| 0 | 566 |
| 567 | |
| 568 if (JvmtiExport::can_pop_frame()) { | |
| 569 #ifndef CC_INTERP | |
| 570 // Regardless of whether we entered this routine with the pending | |
| 571 // popframe condition bit set, we should always clear it now | |
| 572 thread->clear_popframe_condition(); | |
| 573 #else | |
| 574 // C++ interpeter will clear has_pending_popframe when it enters | |
| 575 // with method_resume. For deopt_resume2 we clear it now. | |
| 576 if (thread->popframe_forcing_deopt_reexecution()) | |
| 577 thread->clear_popframe_condition(); | |
| 578 #endif /* CC_INTERP */ | |
| 579 } | |
| 580 | |
| 581 // unpack_frames() is called at the end of the deoptimization handler | |
| 582 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
| 583 // so that an asynchronous stack walker can work again. This counter is | |
| 584 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
| 585 // the beginning of uncommon_trap(). | |
| 586 thread->dec_in_deopt_handler(); | |
| 587 } | |
| 588 | |
| 589 | |
| 590 // Return BasicType of value being returned | |
| 591 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
| 592 | |
| 593 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
| 594 // allocate will be freed at the end of the routine. | |
| 595 | |
| 596 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
| 597 // but makes the entry a little slower. There is however a little dance we have to | |
| 598 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
| 599 ResetNoHandleMark rnhm; // No-op in release/product versions | |
| 600 HandleMark hm; | |
| 601 | |
| 602 frame stub_frame = thread->last_frame(); | |
| 603 | |
| 604 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
| 605 // must point to the vframeArray for the unpack frame. | |
| 606 vframeArray* array = thread->vframe_array_head(); | |
| 607 | |
| 608 #ifndef PRODUCT | |
| 609 if (TraceDeoptimization) { | |
| 6843 | 610 ttyLocker ttyl; |
| 0 | 611 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
| 612 } | |
| 613 #endif | |
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614 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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615 stub_frame.pc(), stub_frame.sp(), exec_mode); |
| 0 | 616 |
| 617 UnrollBlock* info = array->unroll_block(); | |
| 618 | |
| 619 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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620 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
| 0 | 621 |
| 622 BasicType bt = info->return_type(); | |
| 623 | |
| 624 // If we have an exception pending, claim that the return type is an oop | |
| 625 // so the deopt_blob does not overwrite the exception_oop. | |
| 626 | |
| 627 if (exec_mode == Unpack_exception) | |
| 628 bt = T_OBJECT; | |
| 629 | |
| 630 // Cleanup thread deopt data | |
| 631 cleanup_deopt_info(thread, array); | |
| 632 | |
| 633 #ifndef PRODUCT | |
| 634 if (VerifyStack) { | |
| 635 ResourceMark res_mark; | |
| 636 | |
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637 thread->validate_frame_layout(); |
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638 |
| 0 | 639 // Verify that the just-unpacked frames match the interpreter's |
| 640 // notions of expression stack and locals | |
| 641 vframeArray* cur_array = thread->vframe_array_last(); | |
| 642 RegisterMap rm(thread, false); | |
| 643 rm.set_include_argument_oops(false); | |
| 644 bool is_top_frame = true; | |
| 645 int callee_size_of_parameters = 0; | |
| 646 int callee_max_locals = 0; | |
| 647 for (int i = 0; i < cur_array->frames(); i++) { | |
| 648 vframeArrayElement* el = cur_array->element(i); | |
| 649 frame* iframe = el->iframe(); | |
| 650 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
| 651 | |
| 652 // Get the oop map for this bci | |
| 653 InterpreterOopMap mask; | |
| 654 int cur_invoke_parameter_size = 0; | |
| 655 bool try_next_mask = false; | |
| 656 int next_mask_expression_stack_size = -1; | |
| 657 int top_frame_expression_stack_adjustment = 0; | |
| 658 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
| 659 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
| 660 BytecodeStream str(mh); | |
| 661 str.set_start(iframe->interpreter_frame_bci()); | |
| 662 int max_bci = mh->code_size(); | |
| 663 // Get to the next bytecode if possible | |
| 664 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
| 665 // Check to see if we can grab the number of outgoing arguments | |
| 666 // at an uncommon trap for an invoke (where the compiler | |
| 667 // generates debug info before the invoke has executed) | |
| 668 Bytecodes::Code cur_code = str.next(); | |
| 10390 | 669 if (cur_code == Bytecodes::_invokevirtual || |
| 670 cur_code == Bytecodes::_invokespecial || | |
| 671 cur_code == Bytecodes::_invokestatic || | |
| 672 cur_code == Bytecodes::_invokeinterface || | |
| 673 cur_code == Bytecodes::_invokedynamic) { | |
| 2142 | 674 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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675 Symbol* signature = invoke.signature(); |
| 0 | 676 ArgumentSizeComputer asc(signature); |
| 677 cur_invoke_parameter_size = asc.size(); | |
| 10390 | 678 if (invoke.has_receiver()) { |
| 0 | 679 // Add in receiver |
| 680 ++cur_invoke_parameter_size; | |
| 681 } | |
| 10390 | 682 if (i != 0 && !invoke.is_invokedynamic() && MethodHandles::has_member_arg(invoke.klass(), invoke.name())) { |
| 683 callee_size_of_parameters++; | |
| 684 } | |
| 0 | 685 } |
| 686 if (str.bci() < max_bci) { | |
| 687 Bytecodes::Code bc = str.next(); | |
| 688 if (bc >= 0) { | |
| 689 // The interpreter oop map generator reports results before | |
| 690 // the current bytecode has executed except in the case of | |
| 691 // calls. It seems to be hard to tell whether the compiler | |
| 692 // has emitted debug information matching the "state before" | |
| 693 // a given bytecode or the state after, so we try both | |
| 694 switch (cur_code) { | |
| 695 case Bytecodes::_invokevirtual: | |
| 696 case Bytecodes::_invokespecial: | |
| 697 case Bytecodes::_invokestatic: | |
| 698 case Bytecodes::_invokeinterface: | |
| 10390 | 699 case Bytecodes::_invokedynamic: |
| 0 | 700 case Bytecodes::_athrow: |
| 701 break; | |
| 702 default: { | |
| 703 InterpreterOopMap next_mask; | |
| 704 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
| 705 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
| 706 // Need to subtract off the size of the result type of | |
| 707 // the bytecode because this is not described in the | |
| 708 // debug info but returned to the interpreter in the TOS | |
| 709 // caching register | |
| 710 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
| 711 if (bytecode_result_type != T_ILLEGAL) { | |
| 712 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
| 713 } | |
| 714 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
| 715 try_next_mask = true; | |
| 716 break; | |
| 717 } | |
| 718 } | |
| 719 } | |
| 720 } | |
| 721 | |
| 722 // Verify stack depth and oops in frame | |
| 723 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
| 724 if (!( | |
| 725 /* SPARC */ | |
| 726 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
| 727 /* x86 */ | |
| 728 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
| 729 (try_next_mask && | |
| 730 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
| 731 top_frame_expression_stack_adjustment))) || | |
| 732 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
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733 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute || el->should_reexecute()) && |
| 0 | 734 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) |
| 735 )) { | |
| 736 ttyLocker ttyl; | |
| 737 | |
| 738 // Print out some information that will help us debug the problem | |
| 739 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
| 740 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
| 741 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
| 742 iframe->interpreter_frame_expression_stack_size()); | |
| 743 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
| 744 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
| 745 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
| 746 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
| 747 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
| 748 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
| 749 tty->print_cr(" exec_mode = %d", exec_mode); | |
| 750 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
| 751 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
| 752 tty->print_cr(" Interpreted frames:"); | |
| 753 for (int k = 0; k < cur_array->frames(); k++) { | |
| 754 vframeArrayElement* el = cur_array->element(k); | |
| 755 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
| 756 } | |
| 757 cur_array->print_on_2(tty); | |
| 758 guarantee(false, "wrong number of expression stack elements during deopt"); | |
| 759 } | |
| 760 VerifyOopClosure verify; | |
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761 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
| 0 | 762 callee_size_of_parameters = mh->size_of_parameters(); |
| 763 callee_max_locals = mh->max_locals(); | |
| 764 is_top_frame = false; | |
| 765 } | |
| 766 } | |
| 767 #endif /* !PRODUCT */ | |
| 768 | |
| 769 | |
| 770 return bt; | |
| 771 JRT_END | |
| 772 | |
| 773 | |
| 774 int Deoptimization::deoptimize_dependents() { | |
| 775 Threads::deoptimized_wrt_marked_nmethods(); | |
| 776 return 0; | |
| 777 } | |
| 778 | |
| 779 | |
| 22298 | 780 #if defined(COMPILER2) || INCLUDE_JVMCI |
| 0 | 781 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
| 782 Handle pending_exception(thread->pending_exception()); | |
| 783 const char* exception_file = thread->exception_file(); | |
| 784 int exception_line = thread->exception_line(); | |
| 785 thread->clear_pending_exception(); | |
| 786 | |
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787 bool failures = false; |
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788 |
| 0 | 789 for (int i = 0; i < objects->length(); i++) { |
| 790 assert(objects->at(i)->is_object(), "invalid debug information"); | |
| 791 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
| 792 | |
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793 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 794 oop obj = NULL; |
| 795 | |
| 796 if (k->oop_is_instance()) { | |
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797 InstanceKlass* ik = InstanceKlass::cast(k()); |
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798 obj = ik->allocate_instance(THREAD); |
| 0 | 799 } else if (k->oop_is_typeArray()) { |
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800 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
| 0 | 801 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
| 802 int len = sv->field_size() / type2size[ak->element_type()]; | |
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803 obj = ak->allocate(len, THREAD); |
| 0 | 804 } else if (k->oop_is_objArray()) { |
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805 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
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806 obj = ak->allocate(sv->field_size(), THREAD); |
| 0 | 807 } |
| 808 | |
|
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809 if (obj == NULL) { |
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810 failures = true; |
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811 } |
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812 |
| 0 | 813 assert(sv->value().is_null(), "redundant reallocation"); |
|
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814 assert(obj != NULL || HAS_PENDING_EXCEPTION, "allocation should succeed or we should get an exception"); |
|
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815 CLEAR_PENDING_EXCEPTION; |
| 0 | 816 sv->set_value(obj); |
| 817 } | |
| 818 | |
|
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819 if (failures) { |
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820 THROW_OOP_(Universe::out_of_memory_error_realloc_objects(), failures); |
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821 } else if (pending_exception.not_null()) { |
| 0 | 822 thread->set_pending_exception(pending_exception(), exception_file, exception_line); |
| 823 } | |
| 824 | |
|
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825 return failures; |
| 0 | 826 } |
| 827 | |
| 828 // restore elements of an eliminated type array | |
| 829 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
| 830 int index = 0; | |
|
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831 intptr_t val; |
| 0 | 832 |
| 833 for (int i = 0; i < sv->field_size(); i++) { | |
| 834 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
| 835 switch(type) { | |
|
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836 case T_LONG: case T_DOUBLE: { |
|
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837 assert(value->type() == T_INT, "Agreement."); |
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838 StackValue* low = |
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839 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
|
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840 #ifdef _LP64 |
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841 jlong res = (jlong)low->get_int(); |
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842 #else |
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843 #ifdef SPARC |
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844 // For SPARC we have to swap high and low words. |
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845 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
|
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846 #else |
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847 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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848 #endif //SPARC |
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849 #endif |
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850 obj->long_at_put(index, res); |
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851 break; |
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852 } |
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853 |
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854 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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855 case T_INT: case T_FLOAT: { // 4 bytes. |
|
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856 assert(value->type() == T_INT, "Agreement."); |
|
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857 bool big_value = false; |
|
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858 if (i + 1 < sv->field_size() && type == T_INT) { |
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859 if (sv->field_at(i)->is_location()) { |
|
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860 Location::Type type = ((LocationValue*) sv->field_at(i))->location().type(); |
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861 if (type == Location::dbl || type == Location::lng) { |
|
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862 big_value = true; |
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863 } |
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864 } else if (sv->field_at(i)->is_constant_int()) { |
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865 ScopeValue* next_scope_field = sv->field_at(i + 1); |
|
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866 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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867 big_value = true; |
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868 } |
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869 } |
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870 } |
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871 |
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872 if (big_value) { |
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873 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
|
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874 #ifdef _LP64 |
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875 jlong res = (jlong)low->get_int(); |
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876 #else |
|
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877 #ifdef SPARC |
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878 // For SPARC we have to swap high and low words. |
|
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879 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
|
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880 #else |
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|
881 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
|
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882 #endif //SPARC |
|
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883 #endif |
|
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changeset
|
884 obj->int_at_put(index, (jint)*((jint*)&res)); |
|
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885 obj->int_at_put(++index, (jint)*(((jint*)&res) + 1)); |
|
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886 } else { |
|
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887 val = value->get_int(); |
|
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|
888 obj->int_at_put(index, (jint)*((jint*)&val)); |
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|
889 } |
|
44
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6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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|
890 break; |
|
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891 } |
|
44
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|
892 |
|
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|
893 case T_SHORT: case T_CHAR: // 2 bytes |
|
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diff
changeset
|
894 assert(value->type() == T_INT, "Agreement."); |
|
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|
895 val = value->get_int(); |
|
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|
896 obj->short_at_put(index, (jshort)*((jint*)&val)); |
|
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|
897 break; |
|
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|
898 |
|
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|
899 case T_BOOLEAN: case T_BYTE: // 1 byte |
|
52fed2ec0afb
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|
900 assert(value->type() == T_INT, "Agreement."); |
|
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diff
changeset
|
901 val = value->get_int(); |
|
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diff
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|
902 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
|
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diff
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|
903 break; |
|
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|
904 |
| 0 | 905 default: |
| 906 ShouldNotReachHere(); | |
| 907 } | |
| 908 index++; | |
| 909 } | |
| 910 } | |
| 911 | |
| 912 | |
| 913 // restore fields of an eliminated object array | |
| 914 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
| 915 for (int i = 0; i < sv->field_size(); i++) { | |
| 916 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
| 917 assert(value->type() == T_OBJECT, "object element expected"); | |
| 918 obj->obj_at_put(i, value->get_obj()()); | |
| 919 } | |
| 920 } | |
| 921 | |
| 7222 | 922 class ReassignedField { |
| 923 public: | |
| 924 int _offset; | |
| 925 BasicType _type; | |
| 926 public: | |
| 927 ReassignedField() { | |
| 928 _offset = 0; | |
| 929 _type = T_ILLEGAL; | |
| 930 } | |
| 931 }; | |
|
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unify object reallocation code for c2 and Graal
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|
932 |
|
a818db37b7be
unify object reallocation code for c2 and Graal
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changeset
|
933 int compare(ReassignedField* left, ReassignedField* right) { |
| 7222 | 934 return left->_offset - right->_offset; |
|
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unify object reallocation code for c2 and Graal
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|
935 } |
|
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unify object reallocation code for c2 and Graal
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changeset
|
936 |
|
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
|
937 // Restore fields of an eliminated instance object using the same field order |
|
18223
17c98fad6980
converted HotSpotResolvedObjectType to an interface
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938 // returned by HotSpotResolvedObjectTypeImpl.getInstanceFields(true) |
|
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Don't expect internal fields when rematerializing object for C2 methods
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changeset
|
939 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj, bool skip_internal) { |
|
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Doug Simon <doug.simon@oracle.com>
diff
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|
940 if (klass->superklass() != NULL) { |
|
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Don't expect internal fields when rematerializing object for C2 methods
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changeset
|
941 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj, skip_internal); |
|
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|
942 } |
|
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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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943 |
|
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944 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
|
6948
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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
945 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
|
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Don't expect internal fields when rematerializing object for C2 methods
Tom Rodriguez <tom.rodriguez@oracle.com>
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|
946 if (!fs.access_flags().is_static() && (!skip_internal || !fs.access_flags().is_internal())) { |
|
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947 ReassignedField field; |
| 7222 | 948 field._offset = fs.offset(); |
| 949 field._type = FieldType::basic_type(fs.signature()); | |
|
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950 fields->append(field); |
|
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951 } |
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952 } |
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953 fields->sort(compare); |
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954 for (int i = 0; i < fields->length(); i++) { |
|
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955 intptr_t val; |
|
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956 ScopeValue* scope_field = sv->field_at(svIndex); |
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957 StackValue* value = StackValue::create_stack_value(fr, reg_map, scope_field); |
| 7222 | 958 int offset = fields->at(i)._offset; |
| 959 BasicType type = fields->at(i)._type; | |
|
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960 switch (type) { |
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961 case T_OBJECT: case T_ARRAY: |
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962 assert(value->type() == T_OBJECT, "Agreement."); |
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963 obj->obj_field_put(offset, value->get_obj()()); |
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964 break; |
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965 |
|
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966 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
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967 case T_INT: case T_FLOAT: { // 4 bytes. |
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968 assert(value->type() == T_INT, "Agreement."); |
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969 bool big_value = false; |
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970 if (i+1 < fields->length() && fields->at(i+1)._type == T_INT) { |
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971 if (scope_field->is_location()) { |
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972 Location::Type type = ((LocationValue*) scope_field)->location().type(); |
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973 if (type == Location::dbl || type == Location::lng) { |
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974 big_value = true; |
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975 } |
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976 } |
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977 if (scope_field->is_constant_int()) { |
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978 ScopeValue* next_scope_field = sv->field_at(svIndex + 1); |
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979 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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980 big_value = true; |
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981 } |
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982 } |
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983 } |
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984 |
|
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985 if (big_value) { |
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986 i++; |
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987 assert(i < fields->length(), "second T_INT field needed"); |
|
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988 assert(fields->at(i)._type == T_INT, "T_INT field needed"); |
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989 } else { |
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990 val = value->get_int(); |
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991 obj->int_field_put(offset, (jint)*((jint*)&val)); |
|
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992 break; |
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993 } |
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994 } |
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995 /* no break */ |
|
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996 |
|
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997 case T_LONG: case T_DOUBLE: { |
|
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998 assert(value->type() == T_INT, "Agreement."); |
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999 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
|
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1000 #ifdef _LP64 |
|
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1001 jlong res = (jlong)low->get_int(); |
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1002 #else |
|
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1003 #ifdef SPARC |
|
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1004 // For SPARC we have to swap high and low words. |
|
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1005 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
|
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1006 #else |
|
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1007 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
|
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|
1008 #endif //SPARC |
|
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|
1009 #endif |
|
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|
1010 obj->long_field_put(offset, res); |
|
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|
1011 break; |
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1012 } |
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1013 |
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|
1014 case T_SHORT: case T_CHAR: // 2 bytes |
|
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|
1015 assert(value->type() == T_INT, "Agreement."); |
|
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|
1016 val = value->get_int(); |
|
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|
1017 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
|
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|
1018 break; |
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1019 |
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|
1020 case T_BOOLEAN: case T_BYTE: // 1 byte |
|
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|
1021 assert(value->type() == T_INT, "Agreement."); |
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|
1022 val = value->get_int(); |
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|
1023 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
|
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|
1024 break; |
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1025 |
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|
1026 default: |
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|
1027 ShouldNotReachHere(); |
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1028 } |
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|
1029 svIndex++; |
|
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1030 } |
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|
1031 return svIndex; |
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|
1032 } |
| 0 | 1033 |
| 1034 // restore fields of all eliminated objects and arrays | |
|
22599
a7114a5e69e1
Don't expect internal fields when rematerializing object for C2 methods
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22551
diff
changeset
|
1035 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects, bool realloc_failures, bool skip_internal) { |
| 0 | 1036 for (int i = 0; i < objects->length(); i++) { |
| 1037 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
|
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coleenp
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|
1038 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 1039 Handle obj = sv->value(); |
|
20705
d3f3f7677537
6898462: The escape analysis with G1 cause crash assertion src/share/vm/runtime/vframeArray.cpp:94
roland
parents:
20454
diff
changeset
|
1040 assert(obj.not_null() || realloc_failures, "reallocation was missed"); |
|
d3f3f7677537
6898462: The escape analysis with G1 cause crash assertion src/share/vm/runtime/vframeArray.cpp:94
roland
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diff
changeset
|
1041 if (obj.is_null()) { |
|
d3f3f7677537
6898462: The escape analysis with G1 cause crash assertion src/share/vm/runtime/vframeArray.cpp:94
roland
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|
1042 continue; |
|
d3f3f7677537
6898462: The escape analysis with G1 cause crash assertion src/share/vm/runtime/vframeArray.cpp:94
roland
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20454
diff
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|
1043 } |
|
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
1044 if (PrintDeoptimizationDetails) { |
|
3134
4b63eb1197ca
Various fixes around escape analysis.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3090
diff
changeset
|
1045 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
|
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Various fixes around escape analysis.
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|
1046 } |
| 0 | 1047 |
| 1048 if (k->oop_is_instance()) { | |
|
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|
1049 InstanceKlass* ik = InstanceKlass::cast(k()); |
|
22599
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Don't expect internal fields when rematerializing object for C2 methods
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changeset
|
1050 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj(), skip_internal); |
| 0 | 1051 } else if (k->oop_is_typeArray()) { |
|
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
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changeset
|
1052 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
| 0 | 1053 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
| 1054 } else if (k->oop_is_objArray()) { | |
| 1055 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
| 1056 } | |
| 1057 } | |
| 1058 } | |
| 1059 | |
| 1060 | |
| 1061 // relock objects for which synchronization was eliminated | |
|
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1062 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread, bool realloc_failures) { |
| 0 | 1063 for (int i = 0; i < monitors->length(); i++) { |
|
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1064 MonitorInfo* mon_info = monitors->at(i); |
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1065 if (mon_info->eliminated()) { |
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1066 assert(!mon_info->owner_is_scalar_replaced() || realloc_failures, "reallocation was missed"); |
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1067 if (!mon_info->owner_is_scalar_replaced()) { |
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1068 Handle obj = Handle(mon_info->owner()); |
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1069 markOop mark = obj->mark(); |
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1070 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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1071 // New allocated objects may have the mark set to anonymously biased. |
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1072 // Also the deoptimized method may called methods with synchronization |
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1073 // where the thread-local object is bias locked to the current thread. |
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1074 assert(mark->is_biased_anonymously() || |
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1075 mark->biased_locker() == thread, "should be locked to current thread"); |
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1076 // Reset mark word to unbiased prototype. |
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1077 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1078 obj->set_mark(unbiased_prototype); |
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1079 } |
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1080 BasicLock* lock = mon_info->lock(); |
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1081 ObjectSynchronizer::slow_enter(obj, lock, thread); |
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1082 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
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1083 } |
| 0 | 1084 } |
| 1085 } | |
| 1086 } | |
| 1087 | |
| 1088 | |
| 1089 #ifndef PRODUCT | |
| 1090 // print information about reallocated objects | |
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1091 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects, bool realloc_failures) { |
| 0 | 1092 fieldDescriptor fd; |
| 1093 | |
| 1094 for (int i = 0; i < objects->length(); i++) { | |
| 1095 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1096 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 1097 Handle obj = sv->value(); |
| 1098 | |
|
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1099 tty->print(" object <" INTPTR_FORMAT "> of type ", (void *)sv->value()()); |
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1100 k->print_value(); |
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1101 assert(obj.not_null() || realloc_failures, "reallocation was missed"); |
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1102 if (obj.is_null()) { |
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1103 tty->print(" allocation failed"); |
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1104 } else { |
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1105 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
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1106 } |
| 0 | 1107 tty->cr(); |
| 1108 | |
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1109 if (Verbose && !obj.is_null()) { |
| 0 | 1110 k->oop_print_on(obj(), tty); |
| 1111 } | |
| 1112 } | |
| 1113 } | |
| 1114 #endif | |
| 22298 | 1115 #endif // COMPILER2 || INCLUDE_JVMCI |
| 0 | 1116 |
|
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1117 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk, bool realloc_failures) { |
|
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1118 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
| 0 | 1119 |
| 1120 #ifndef PRODUCT | |
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1121 if (PrintDeoptimizationDetails) { |
| 0 | 1122 ttyLocker ttyl; |
| 1123 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
| 1124 fr.print_on(tty); | |
| 1125 tty->print_cr(" Virtual frames (innermost first):"); | |
| 1126 for (int index = 0; index < chunk->length(); index++) { | |
| 1127 compiledVFrame* vf = chunk->at(index); | |
| 1128 tty->print(" %2d - ", index); | |
| 1129 vf->print_value(); | |
| 1130 int bci = chunk->at(index)->raw_bci(); | |
| 1131 const char* code_name; | |
| 1132 if (bci == SynchronizationEntryBCI) { | |
| 1133 code_name = "sync entry"; | |
| 1134 } else { | |
| 2142 | 1135 Bytecodes::Code code = vf->method()->code_at(bci); |
| 0 | 1136 code_name = Bytecodes::name(code); |
| 1137 } | |
| 1138 tty->print(" - %s", code_name); | |
| 1139 tty->print_cr(" @ bci %d ", bci); | |
| 1140 if (Verbose) { | |
| 1141 vf->print(); | |
| 1142 tty->cr(); | |
| 1143 } | |
| 1144 } | |
| 1145 } | |
| 1146 #endif | |
| 1147 | |
| 1148 // Register map for next frame (used for stack crawl). We capture | |
| 1149 // the state of the deopt'ing frame's caller. Thus if we need to | |
| 1150 // stuff a C2I adapter we can properly fill in the callee-save | |
| 1151 // register locations. | |
| 1152 frame caller = fr.sender(reg_map); | |
| 1153 int frame_size = caller.sp() - fr.sp(); | |
| 1154 | |
| 1155 frame sender = caller; | |
| 1156 | |
| 1157 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
| 1158 // the vframeArray containing the unpacking information is allocated in the C heap. | |
| 1159 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
|
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1160 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr, realloc_failures); |
| 0 | 1161 |
| 1162 // Compare the vframeArray to the collected vframes | |
| 1163 assert(array->structural_compare(thread, chunk), "just checking"); | |
| 1164 | |
| 1165 #ifndef PRODUCT | |
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1166 if (PrintDeoptimizationDetails) { |
| 0 | 1167 ttyLocker ttyl; |
| 1168 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
| 1169 } | |
| 1170 #endif // PRODUCT | |
| 1171 | |
| 1172 return array; | |
| 1173 } | |
| 1174 | |
| 22298 | 1175 #if defined(COMPILER2) || INCLUDE_JVMCI |
|
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1176 void Deoptimization::pop_frames_failed_reallocs(JavaThread* thread, vframeArray* array) { |
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1177 // Reallocation of some scalar replaced objects failed. Record |
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1178 // that we need to pop all the interpreter frames for the |
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1179 // deoptimized compiled frame. |
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1180 assert(thread->frames_to_pop_failed_realloc() == 0, "missed frames to pop?"); |
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1181 thread->set_frames_to_pop_failed_realloc(array->frames()); |
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1182 // Unlock all monitors here otherwise the interpreter will see a |
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1183 // mix of locked and unlocked monitors (because of failed |
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1184 // reallocations of synchronized objects) and be confused. |
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1185 for (int i = 0; i < array->frames(); i++) { |
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1186 MonitorChunk* monitors = array->element(i)->monitors(); |
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1187 if (monitors != NULL) { |
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1188 for (int j = 0; j < monitors->number_of_monitors(); j++) { |
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1189 BasicObjectLock* src = monitors->at(j); |
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1190 if (src->obj() != NULL) { |
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1191 ObjectSynchronizer::fast_exit(src->obj(), src->lock(), thread); |
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1192 } |
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1193 } |
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1194 array->element(i)->free_monitors(thread); |
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1195 #ifdef ASSERT |
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1196 array->element(i)->set_removed_monitors(); |
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1197 #endif |
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1198 } |
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1199 } |
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1200 } |
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1201 #endif |
| 0 | 1202 |
| 1203 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
| 1204 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
| 1205 for (int i = 0; i < monitors->length(); i++) { | |
| 1206 MonitorInfo* mon_info = monitors->at(i); | |
|
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1207 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
| 0 | 1208 objects_to_revoke->append(Handle(mon_info->owner())); |
| 1209 } | |
| 1210 } | |
| 1211 } | |
| 1212 | |
| 1213 | |
| 1214 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
| 1215 if (!UseBiasedLocking) { | |
| 1216 return; | |
| 1217 } | |
| 1218 | |
| 1219 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 1220 | |
| 1221 // Unfortunately we don't have a RegisterMap available in most of | |
| 1222 // the places we want to call this routine so we need to walk the | |
| 1223 // stack again to update the register map. | |
| 1224 if (map == NULL || !map->update_map()) { | |
| 1225 StackFrameStream sfs(thread, true); | |
| 1226 bool found = false; | |
| 1227 while (!found && !sfs.is_done()) { | |
| 1228 frame* cur = sfs.current(); | |
| 1229 sfs.next(); | |
| 1230 found = cur->id() == fr.id(); | |
| 1231 } | |
| 1232 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
| 1233 map = sfs.register_map(); | |
| 1234 } | |
| 1235 | |
| 1236 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
| 1237 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1238 // Revoke monitors' biases in all scopes | |
| 1239 while (!cvf->is_top()) { | |
| 1240 collect_monitors(cvf, objects_to_revoke); | |
| 1241 cvf = compiledVFrame::cast(cvf->sender()); | |
| 1242 } | |
| 1243 collect_monitors(cvf, objects_to_revoke); | |
| 1244 | |
| 1245 if (SafepointSynchronize::is_at_safepoint()) { | |
| 1246 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
| 1247 } else { | |
| 1248 BiasedLocking::revoke(objects_to_revoke); | |
| 1249 } | |
| 1250 } | |
| 1251 | |
| 1252 | |
| 1253 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
| 1254 if (!UseBiasedLocking) { | |
| 1255 return; | |
| 1256 } | |
| 1257 | |
| 1258 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
| 1259 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 1260 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
| 1261 if (jt->has_last_Java_frame()) { | |
| 1262 StackFrameStream sfs(jt, true); | |
| 1263 while (!sfs.is_done()) { | |
| 1264 frame* cur = sfs.current(); | |
| 1265 if (cb->contains(cur->pc())) { | |
| 1266 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
| 1267 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1268 // Revoke monitors' biases in all scopes | |
| 1269 while (!cvf->is_top()) { | |
| 1270 collect_monitors(cvf, objects_to_revoke); | |
| 1271 cvf = compiledVFrame::cast(cvf->sender()); | |
| 1272 } | |
| 1273 collect_monitors(cvf, objects_to_revoke); | |
| 1274 } | |
| 1275 sfs.next(); | |
| 1276 } | |
| 1277 } | |
| 1278 } | |
| 1279 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
| 1280 } | |
| 1281 | |
| 1282 | |
|
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1283 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
| 0 | 1284 assert(fr.can_be_deoptimized(), "checking frame type"); |
| 1285 | |
|
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1286 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
| 0 | 1287 |
|
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Tom Rodriguez <tom.rodriguez@oracle.com>
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1288 if (LogCompilation && xtty != NULL) { |
|
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Record frame state for deopts with +LogCompilation
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1289 nmethod* nm = fr.cb()->as_nmethod_or_null(); |
|
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|
1290 assert(nm != NULL, "only nmethods can deopt"); |
|
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|
1291 |
|
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|
1292 ttyLocker ttyl; |
|
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37a5c6b8b930
Log deopt before deoptimizing the frame
Tom Rodriguez <tom.rodriguez@oracle.com>
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diff
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|
1293 xtty->begin_head("deoptimized thread='" UINTX_FORMAT "'", thread->osthread()->thread_id()); |
|
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|
1294 nm->log_identity(xtty); |
|
40074f6ac788
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Tom Rodriguez <tom.rodriguez@oracle.com>
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|
1295 xtty->end_head(); |
|
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|
1296 for (ScopeDesc* sd = nm->scope_desc_at(fr.pc()); ; sd = sd->sender()) { |
|
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1297 xtty->begin_elem("jvms bci='%d'", sd->bci()); |
|
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|
1298 xtty->method(sd->method()); |
|
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1299 xtty->end_elem(); |
|
40074f6ac788
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|
1300 if (sd->is_top()) break; |
|
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|
1301 } |
|
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|
1302 xtty->tail("deoptimized"); |
|
40074f6ac788
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|
1303 } |
| 0 | 1304 |
| 1305 // Patch the nmethod so that when execution returns to it we will | |
| 1306 // deopt the execution state and return to the interpreter. | |
| 1307 fr.deoptimize(thread); | |
| 1308 } | |
| 1309 | |
| 1310 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map) { | |
|
13188
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Bernhard Urban <bernhard.urban@jku.at>
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|
1311 deoptimize(thread, fr, map, Reason_constraint); |
|
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Bernhard Urban <bernhard.urban@jku.at>
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|
1312 } |
|
6b2d8d20ecbd
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Bernhard Urban <bernhard.urban@jku.at>
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|
1313 |
|
5110
0ebca2e35ca5
more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
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diff
changeset
|
1314 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
| 0 | 1315 // Deoptimize only if the frame comes from compile code. |
| 1316 // Do not deoptimize the frame which is already patched | |
| 1317 // during the execution of the loops below. | |
| 1318 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
| 1319 return; | |
| 1320 } | |
| 1321 ResourceMark rm; | |
| 1322 DeoptimizationMarker dm; | |
| 1323 if (UseBiasedLocking) { | |
| 1324 revoke_biases_of_monitors(thread, fr, map); | |
| 1325 } | |
|
5110
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more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
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diff
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|
1326 deoptimize_single_frame(thread, fr, reason); |
| 0 | 1327 |
| 1328 } | |
| 1329 | |
| 1330 | |
|
5110
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more preparations for disabling runtime feedback selectively based on deoptimization history
Christian Haeubl <christian.haeubl@oracle.com>
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diff
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|
1331 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
|
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1332 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
|
ce6848d0666d
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|
1333 "can only deoptimize other thread at a safepoint"); |
| 0 | 1334 // Compute frame and register map based on thread and sp. |
| 1335 RegisterMap reg_map(thread, UseBiasedLocking); | |
| 1336 frame fr = thread->last_frame(); | |
| 1337 while (fr.id() != id) { | |
| 1338 fr = fr.sender(®_map); | |
| 1339 } | |
|
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|
1340 deoptimize(thread, fr, ®_map, reason); |
| 0 | 1341 } |
| 1342 | |
| 1343 | |
|
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Christian Haeubl <christian.haeubl@oracle.com>
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|
1344 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
|
1905
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1345 if (thread == Thread::current()) { |
|
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|
1346 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
|
1905
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|
1347 } else { |
|
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|
1348 VM_DeoptimizeFrame deopt(thread, id, reason); |
|
1905
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|
1349 VMThread::execute(&deopt); |
|
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1350 } |
|
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1351 } |
|
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1352 |
|
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Bernhard Urban <bernhard.urban@jku.at>
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|
1353 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id) { |
|
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Bernhard Urban <bernhard.urban@jku.at>
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|
1354 deoptimize_frame(thread, id, Reason_constraint); |
|
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1355 } |
|
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1356 |
| 0 | 1357 // JVMTI PopFrame support |
| 1358 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
| 1359 { | |
| 1360 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
| 1361 } | |
| 1362 JRT_END | |
| 1363 | |
| 1364 | |
| 22298 | 1365 #if defined(COMPILER2) || defined(SHARK) || INCLUDE_JVMCI |
| 0 | 1366 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
| 1367 // in case of an unresolved klass entry, load the class. | |
| 1368 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
1369 Klass* tk = constant_pool->klass_at(index, CHECK); |
| 0 | 1370 return; |
| 1371 } | |
| 1372 | |
| 1373 if (!constant_pool->tag_at(index).is_symbol()) return; | |
| 1374 | |
|
6940
18fb7da42534
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|
1375 Handle class_loader (THREAD, constant_pool->pool_holder()->class_loader()); |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
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|
1376 Symbol* symbol = constant_pool->symbol_at(index); |
| 0 | 1377 |
| 1378 // class name? | |
| 1379 if (symbol->byte_at(0) != '(') { | |
|
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|
1380 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
| 0 | 1381 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
| 1382 return; | |
| 1383 } | |
| 1384 | |
| 1385 // then it must be a signature! | |
|
2177
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|
1386 ResourceMark rm(THREAD); |
| 0 | 1387 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
| 1388 if (ss.is_object()) { | |
|
2177
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coleenp
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|
1389 Symbol* class_name = ss.as_symbol(CHECK); |
|
6940
18fb7da42534
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coleenp
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diff
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|
1390 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
| 0 | 1391 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
| 1392 } | |
| 1393 } | |
| 1394 } | |
| 1395 | |
| 1396 | |
| 1397 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
| 1398 EXCEPTION_MARK; | |
| 1399 load_class_by_index(constant_pool, index, THREAD); | |
| 1400 if (HAS_PENDING_EXCEPTION) { | |
| 1401 // Exception happened during classloading. We ignore the exception here, since it | |
|
14230
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8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1402 // is going to be rethrown since the current activation is going to be deoptimized and |
| 0 | 1403 // the interpreter will re-execute the bytecode. |
| 1404 CLEAR_PENDING_EXCEPTION; | |
|
14230
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|
1405 // Class loading called java code which may have caused a stack |
|
b9b6934ad75c
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|
1406 // overflow. If the exception was thrown right before the return |
|
b9b6934ad75c
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parents:
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|
1407 // to the runtime the stack is no longer guarded. Reguard the |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
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parents:
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|
1408 // stack otherwise if we return to the uncommon trap blob and the |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
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diff
changeset
|
1409 // stack bang causes a stack overflow we crash. |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
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parents:
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diff
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|
1410 assert(THREAD->is_Java_thread(), "only a java thread can be here"); |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
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diff
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|
1411 JavaThread* thread = (JavaThread*)THREAD; |
|
b9b6934ad75c
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diff
changeset
|
1412 bool guard_pages_enabled = thread->stack_yellow_zone_enabled(); |
|
b9b6934ad75c
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diff
changeset
|
1413 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
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diff
changeset
|
1414 assert(guard_pages_enabled, "stack banging in uncommon trap blob may cause crash"); |
| 0 | 1415 } |
| 1416 } | |
| 1417 | |
| 1418 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
| 1419 HandleMark hm; | |
| 1420 | |
| 1421 // uncommon_trap() is called at the beginning of the uncommon trap | |
| 1422 // handler. Note this fact before we start generating temporary frames | |
| 1423 // that can confuse an asynchronous stack walker. This counter is | |
| 1424 // decremented at the end of unpack_frames(). | |
| 1425 thread->inc_in_deopt_handler(); | |
| 1426 | |
| 1427 // We need to update the map if we have biased locking. | |
| 22298 | 1428 #if INCLUDE_JVMCI |
|
22551
71ea8d7db665
removed author tags in comments
Doug Simon <doug.simon@oracle.com>
parents:
22548
diff
changeset
|
1429 // JVMCI might need to get an exception from the stack, which in turn requires the register map to be valid |
|
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
|
1430 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:
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diff
changeset
|
1431 #else |
| 0 | 1432 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:
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diff
changeset
|
1433 #endif |
| 0 | 1434 frame stub_frame = thread->last_frame(); |
| 1435 frame fr = stub_frame.sender(®_map); | |
| 1436 // Make sure the calling nmethod is not getting deoptimized and removed | |
| 1437 // before we are done with it. | |
| 1438 nmethodLocker nl(fr.pc()); | |
| 1439 | |
|
4872
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7141200: log some interesting information in ring buffers for crashes
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|
1440 // 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
|
1441 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:
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diff
changeset
|
1442 trap_request, fr.pc(), fr.pc() - fr.cb()->code_begin()); |
|
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|
1443 |
| 0 | 1444 { |
| 1445 ResourceMark rm; | |
| 1446 | |
| 1447 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
| 1448 revoke_biases_of_monitors(thread, fr, ®_map); | |
| 1449 | |
| 1450 DeoptReason reason = trap_request_reason(trap_request); | |
| 1451 DeoptAction action = trap_request_action(trap_request); | |
| 22298 | 1452 #if INCLUDE_JVMCI |
|
13857
a9604b40f5e7
On HotSpot, debug_id should be an int, not a short
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13768
diff
changeset
|
1453 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>
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diff
changeset
|
1454 #endif |
| 0 | 1455 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 |
| 1456 | |
| 1457 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
| 1458 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1459 | |
| 1460 nmethod* nm = cvf->code(); | |
| 1461 | |
| 1462 ScopeDesc* trap_scope = cvf->scope(); | |
|
3017
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Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
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|
1463 |
|
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
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changeset
|
1464 if (TraceDeoptimization) { |
|
19670
1f95f91dd1d6
Add ttyLocker to TraceDeoptimization output
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18712
diff
changeset
|
1465 ttyLocker ttyl; |
|
21559
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recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
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diff
changeset
|
1466 tty->print_cr(" bci=%d pc=" INTPTR_FORMAT ", relative_pc=%d, method=%s" JVMCI_ONLY(", debug_id=%d"), trap_scope->bci(), fr.pc(), fr.pc() - nm->code_begin(), trap_scope->method()->name_and_sig_as_C_string() |
| 22298 | 1467 #if INCLUDE_JVMCI |
|
13641
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Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
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|
1468 , debug_id |
|
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
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diff
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|
1469 #endif |
|
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
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diff
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|
1470 ); |
|
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
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|
1471 } |
| 0 | 1472 |
| 1473 methodHandle trap_method = trap_scope->method(); | |
| 1474 int trap_bci = trap_scope->bci(); | |
| 22298 | 1475 #if INCLUDE_JVMCI |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
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13220
diff
changeset
|
1476 oop speculation = thread->pending_failed_speculation(); |
|
21559
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recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
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diff
changeset
|
1477 if (nm->is_compiled_by_jvmci()) { |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1478 if (speculation != NULL) { |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1479 oop speculation_log = nm->speculation_log(); |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1480 if (speculation_log != NULL) { |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1481 if (TraceDeoptimization || TraceUncollectedSpeculations) { |
|
22699
ea58bbafd5b9
Move SpeculationLog implementation to HotSpotSpeculationLog, because it is not useful for other VMs
Christian Wimmer <christian.wimmer@oracle.com>
parents:
22599
diff
changeset
|
1482 if (HotSpotSpeculationLog::lastFailed(speculation_log) != NULL) { |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1483 tty->print_cr("A speculation that was not collected by the compiler is being overwritten"); |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1484 } |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1485 } |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1486 if (TraceDeoptimization) { |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1487 tty->print_cr("Saving speculation to speculation log"); |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1488 } |
|
22699
ea58bbafd5b9
Move SpeculationLog implementation to HotSpotSpeculationLog, because it is not useful for other VMs
Christian Wimmer <christian.wimmer@oracle.com>
parents:
22599
diff
changeset
|
1489 HotSpotSpeculationLog::set_lastFailed(speculation_log, speculation); |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1490 } else { |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1491 if (TraceDeoptimization) { |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1492 tty->print_cr("Speculation present but no speculation log"); |
|
13642
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1493 } |
|
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1494 } |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1495 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
|
1496 } 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
|
1497 if (TraceDeoptimization) { |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1498 tty->print_cr("No speculation"); |
|
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1499 } |
|
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
|
1500 } |
|
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
|
1501 } else { |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1502 assert(speculation == NULL, "There should not be a speculation for method compiled by non-JVMCI compilers"); |
|
13714
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1503 } |
|
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
|
1504 |
|
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1505 if (trap_bci == SynchronizationEntryBCI) { |
|
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1506 trap_bci = 0; |
|
22460
f27c163d7dc2
moved JVMCI fields from ThreadShadow to Thread
Doug Simon <doug.simon@oracle.com>
parents:
22441
diff
changeset
|
1507 thread->set_pending_monitorenter(true); |
|
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1508 } |
|
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
|
1509 |
|
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1510 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
|
1511 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
|
1512 } |
|
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1513 #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
|
1514 |
| 2142 | 1515 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
| 0 | 1516 |
|
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
|
1517 if (trap_scope->rethrow_exception()) { |
|
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
1518 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
|
1519 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
|
1520 } |
|
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
|
1521 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
|
1522 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
|
1523 ScopeValue* topOfStack = expressions->top(); |
|
8151
b8f261ba79c6
Minimize diff to plain HotSpot version.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8124
diff
changeset
|
1524 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
|
1525 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
|
1526 } |
|
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1527 |
| 0 | 1528 // Record this event in the histogram. |
| 1529 gather_statistics(reason, action, trap_bc); | |
| 1530 | |
| 1531 // Ensure that we can record deopt. history: | |
| 17780 | 1532 // Need MDO to record RTM code generation state. |
| 1533 bool create_if_missing = ProfileTraps RTM_OPT_ONLY( || UseRTMLocking ); | |
| 0 | 1534 |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1535 methodHandle profiled_method; |
| 22298 | 1536 #if INCLUDE_JVMCI |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1537 if (nm->is_compiled_by_jvmci()) { |
|
9571
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1538 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
|
1539 } else { |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1540 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
|
1541 } |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1542 #else |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1543 profiled_method = trap_method; |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1544 #endif |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1545 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1546 MethodData* trap_mdo = |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1547 get_method_data(thread, profiled_method, create_if_missing); |
| 0 | 1548 |
|
7193
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1549 // Log a message |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1550 Events::log_deopt_message(thread, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT " method=%s @ %d", |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1551 trap_reason_name(reason), trap_action_name(action), fr.pc(), |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1552 trap_method->name_and_sig_as_C_string(), trap_bci); |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1553 |
| 0 | 1554 // Print a bunch of diagnostics, if requested. |
| 1555 if (TraceDeoptimization || LogCompilation) { | |
| 1556 ResourceMark rm; | |
| 1557 ttyLocker ttyl; | |
| 1558 char buf[100]; | |
| 1559 if (xtty != NULL) { | |
| 1560 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
| 1561 os::current_thread_id(), | |
| 1562 format_trap_request(buf, sizeof(buf), trap_request)); | |
| 1563 nm->log_identity(xtty); | |
| 1564 } | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1565 Symbol* class_name = NULL; |
| 0 | 1566 bool unresolved = false; |
| 1567 if (unloaded_class_index >= 0) { | |
| 1568 constantPoolHandle constants (THREAD, trap_method->constants()); | |
| 1569 if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1570 class_name = constants->klass_name_at(unloaded_class_index); |
| 0 | 1571 unresolved = true; |
| 1572 if (xtty != NULL) | |
| 1573 xtty->print(" unresolved='1'"); | |
| 1574 } else if (constants->tag_at(unloaded_class_index).is_symbol()) { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1575 class_name = constants->symbol_at(unloaded_class_index); |
| 0 | 1576 } |
| 1577 if (xtty != NULL) | |
| 1578 xtty->name(class_name); | |
| 1579 } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1580 if (xtty != NULL && trap_mdo != NULL) { |
| 0 | 1581 // Dump the relevant MDO state. |
| 1582 // This is the deopt count for the current reason, any previous | |
| 1583 // reasons or recompiles seen at this point. | |
| 1584 int dcnt = trap_mdo->trap_count(reason); | |
| 1585 if (dcnt != 0) | |
| 1586 xtty->print(" count='%d'", dcnt); | |
| 1587 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
| 1588 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
| 1589 if (dos != 0) { | |
| 1590 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
| 1591 if (trap_state_is_recompiled(dos)) { | |
| 1592 int recnt2 = trap_mdo->overflow_recompile_count(); | |
| 1593 if (recnt2 != 0) | |
| 1594 xtty->print(" recompiles2='%d'", recnt2); | |
| 1595 } | |
| 1596 } | |
| 1597 } | |
| 1598 if (xtty != NULL) { | |
| 1599 xtty->stamp(); | |
| 1600 xtty->end_head(); | |
| 1601 } | |
| 1602 if (TraceDeoptimization) { // make noise on the tty | |
| 1603 tty->print("Uncommon trap occurred in"); | |
| 1604 nm->method()->print_short_name(tty); | |
|
19961
71040f48cc34
TraceDeoptimization: print compiler and compile_id
Gilles Duboscq <gilles.m.duboscq@oracle.com>
parents:
19670
diff
changeset
|
1605 tty->print(" compiler=%s compile_id=%d", nm->compiler() == NULL ? "" : nm->compiler()->name(), nm->compile_id()); |
| 22298 | 1606 #if INCLUDE_JVMCI |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1607 oop installedCode = nm->jvmci_installed_code(); |
|
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1608 if (installedCode != NULL) { |
|
15161
2c940b1a48d8
Convert InstalledCode from an interface into an abstract class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
15104
diff
changeset
|
1609 oop installedCodeName = NULL; |
|
16401
347915b8cea8
Move name from HotSpotNmethod to InstalledCode to have a name again for truffle nmethods.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
16025
diff
changeset
|
1610 if (installedCode->is_a(InstalledCode::klass())) { |
|
347915b8cea8
Move name from HotSpotNmethod to InstalledCode to have a name again for truffle nmethods.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
16025
diff
changeset
|
1611 installedCodeName = InstalledCode::name(installedCode); |
|
15161
2c940b1a48d8
Convert InstalledCode from an interface into an abstract class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
15104
diff
changeset
|
1612 } |
|
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1613 if (installedCodeName != NULL) { |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1614 tty->print(" (JVMCI: installedCodeName=%s) ", java_lang_String::as_utf8_string(installedCodeName)); |
|
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1615 } else { |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1616 tty->print(" (JVMCI: installed code has no name) "); |
|
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1617 } |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1618 } else if (nm->is_compiled_by_jvmci()) { |
|
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1619 tty->print(" (JVMCI: no installed code) "); |
|
12517
b2882f4ab612
Add an optional name to HotSpotNmethod. Print it during deopt. Use it when installing a Truffle compilation
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12356
diff
changeset
|
1620 } |
| 22298 | 1621 #endif |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1622 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d" JVMCI_ONLY(" debug_id=%d"), |
| 0 | 1623 fr.pc(), |
| 6843 | 1624 os::current_thread_id(), |
| 0 | 1625 trap_reason_name(reason), |
| 1626 trap_action_name(action), | |
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1627 unloaded_class_index |
| 22298 | 1628 #if INCLUDE_JVMCI |
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1629 , debug_id |
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1630 #endif |
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1631 ); |
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1632 if (class_name != NULL) { |
| 0 | 1633 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
| 1634 class_name->print_symbol_on(tty); | |
| 1635 } | |
| 1636 tty->cr(); | |
| 1637 } | |
| 1638 if (xtty != NULL) { | |
| 1639 // Log the precise location of the trap. | |
| 1640 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
| 1641 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
| 1642 xtty->method(sd->method()); | |
| 1643 xtty->end_elem(); | |
| 1644 if (sd->is_top()) break; | |
| 1645 } | |
| 1646 xtty->tail("uncommon_trap"); | |
| 1647 } | |
| 1648 } | |
| 1649 // (End diagnostic printout.) | |
| 1650 | |
| 1651 // Load class if necessary | |
| 1652 if (unloaded_class_index >= 0) { | |
| 1653 constantPoolHandle constants(THREAD, trap_method->constants()); | |
| 1654 load_class_by_index(constants, unloaded_class_index); | |
| 1655 } | |
| 1656 | |
| 1657 // Flush the nmethod if necessary and desirable. | |
| 1658 // | |
| 1659 // We need to avoid situations where we are re-flushing the nmethod | |
| 1660 // because of a hot deoptimization site. Repeated flushes at the same | |
| 1661 // point need to be detected by the compiler and avoided. If the compiler | |
| 1662 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
| 1663 // module must take measures to avoid an infinite cycle of recompilation | |
| 1664 // and deoptimization. There are several such measures: | |
| 1665 // | |
| 1666 // 1. If a recompilation is ordered a second time at some site X | |
| 1667 // and for the same reason R, the action is adjusted to 'reinterpret', | |
| 1668 // to give the interpreter time to exercise the method more thoroughly. | |
| 1669 // If this happens, the method's overflow_recompile_count is incremented. | |
| 1670 // | |
| 1671 // 2. If the compiler fails to reduce the deoptimization rate, then | |
| 1672 // the method's overflow_recompile_count will begin to exceed the set | |
| 1673 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
| 1674 // is adjusted to 'make_not_compilable', and the method is abandoned | |
| 1675 // to the interpreter. This is a performance hit for hot methods, | |
| 1676 // but is better than a disastrous infinite cycle of recompilations. | |
| 1677 // (Actually, only the method containing the site X is abandoned.) | |
| 1678 // | |
| 1679 // 3. In parallel with the previous measures, if the total number of | |
| 1680 // recompilations of a method exceeds the much larger set limit | |
| 1681 // PerMethodRecompilationCutoff, the method is abandoned. | |
| 1682 // This should only happen if the method is very large and has | |
| 1683 // many "lukewarm" deoptimizations. The code which enforces this | |
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1684 // limit is elsewhere (class nmethod, class Method). |
| 0 | 1685 // |
| 1686 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
| 1687 // to recompile at each bytecode independently of the per-BCI cutoff. | |
| 1688 // | |
| 1689 // The decision to update code is up to the compiler, and is encoded | |
| 1690 // in the Action_xxx code. If the compiler requests Action_none | |
| 1691 // no trap state is changed, no compiled code is changed, and the | |
| 1692 // computation suffers along in the interpreter. | |
| 1693 // | |
| 1694 // The other action codes specify various tactics for decompilation | |
| 1695 // and recompilation. Action_maybe_recompile is the loosest, and | |
| 1696 // allows the compiled code to stay around until enough traps are seen, | |
| 1697 // and until the compiler gets around to recompiling the trapping method. | |
| 1698 // | |
| 1699 // The other actions cause immediate removal of the present code. | |
| 1700 | |
| 1701 bool update_trap_state = true; | |
| 1702 bool make_not_entrant = false; | |
| 1703 bool make_not_compilable = false; | |
| 1783 | 1704 bool reprofile = false; |
| 0 | 1705 switch (action) { |
| 1706 case Action_none: | |
| 1707 // Keep the old code. | |
| 1708 update_trap_state = false; | |
| 1709 break; | |
| 1710 case Action_maybe_recompile: | |
| 1711 // Do not need to invalidate the present code, but we can | |
| 1712 // initiate another | |
| 1713 // Start compiler without (necessarily) invalidating the nmethod. | |
| 1714 // The system will tolerate the old code, but new code should be | |
| 1715 // generated when possible. | |
| 1716 break; | |
| 1717 case Action_reinterpret: | |
| 1718 // Go back into the interpreter for a while, and then consider | |
| 1719 // recompiling form scratch. | |
| 1720 make_not_entrant = true; | |
| 1721 // Reset invocation counter for outer most method. | |
| 1722 // This will allow the interpreter to exercise the bytecodes | |
| 1723 // for a while before recompiling. | |
| 1724 // By contrast, Action_make_not_entrant is immediate. | |
| 1725 // | |
| 1726 // Note that the compiler will track null_check, null_assert, | |
| 1727 // range_check, and class_check events and log them as if they | |
| 1728 // had been traps taken from compiled code. This will update | |
| 1729 // the MDO trap history so that the next compilation will | |
| 1730 // properly detect hot trap sites. | |
| 1783 | 1731 reprofile = true; |
| 0 | 1732 break; |
| 1733 case Action_make_not_entrant: | |
| 1734 // Request immediate recompilation, and get rid of the old code. | |
| 1735 // Make them not entrant, so next time they are called they get | |
| 1736 // recompiled. Unloaded classes are loaded now so recompile before next | |
| 1737 // time they are called. Same for uninitialized. The interpreter will | |
| 1738 // link the missing class, if any. | |
| 1739 make_not_entrant = true; | |
| 1740 break; | |
| 1741 case Action_make_not_compilable: | |
| 1742 // Give up on compiling this method at all. | |
| 1743 make_not_entrant = true; | |
| 1744 make_not_compilable = true; | |
| 1745 break; | |
| 1746 default: | |
| 1747 ShouldNotReachHere(); | |
| 1748 } | |
| 1749 | |
| 1750 // Setting +ProfileTraps fixes the following, on all platforms: | |
| 1751 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
| 1752 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
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1753 // recompile relies on a MethodData* to record heroic opt failures. |
| 0 | 1754 |
| 1755 // Whether the interpreter is producing MDO data or not, we also need | |
| 1756 // to use the MDO to detect hot deoptimization points and control | |
| 1757 // aggressive optimization. | |
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1758 bool inc_recompile_count = false; |
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1759 ProfileData* pdata = NULL; |
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1760 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
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1761 assert(trap_mdo == get_method_data(thread, profiled_method, false), "sanity"); |
| 0 | 1762 uint this_trap_count = 0; |
| 1763 bool maybe_prior_trap = false; | |
| 1764 bool maybe_prior_recompile = false; | |
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1765 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
| 22298 | 1766 #if INCLUDE_JVMCI |
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1767 nm->is_compiled_by_jvmci() && nm->is_osr_method(), |
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1768 #endif |
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1769 nm->method(), |
| 0 | 1770 //outputs: |
| 1771 this_trap_count, | |
| 1772 maybe_prior_trap, | |
| 1773 maybe_prior_recompile); | |
| 1774 // Because the interpreter also counts null, div0, range, and class | |
| 1775 // checks, these traps from compiled code are double-counted. | |
| 1776 // This is harmless; it just means that the PerXTrapLimit values | |
| 1777 // are in effect a little smaller than they look. | |
| 1778 | |
| 1779 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
| 1780 if (per_bc_reason != Reason_none) { | |
| 1781 // Now take action based on the partially known per-BCI history. | |
| 1782 if (maybe_prior_trap | |
| 1783 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
| 1784 // If there are too many traps at this BCI, force a recompile. | |
| 1785 // This will allow the compiler to see the limit overflow, and | |
| 1786 // take corrective action, if possible. The compiler generally | |
| 1787 // does not use the exact PerBytecodeTrapLimit value, but instead | |
| 1788 // changes its tactics if it sees any traps at all. This provides | |
| 1789 // a little hysteresis, delaying a recompile until a trap happens | |
| 1790 // several times. | |
| 1791 // | |
| 1792 // Actually, since there is only one bit of counter per BCI, | |
| 1793 // the possible per-BCI counts are {0,1,(per-method count)}. | |
| 1794 // This produces accurate results if in fact there is only | |
| 1795 // one hot trap site, but begins to get fuzzy if there are | |
| 1796 // many sites. For example, if there are ten sites each | |
| 1797 // trapping two or more times, they each get the blame for | |
| 1798 // all of their traps. | |
| 1799 make_not_entrant = true; | |
| 1800 } | |
| 1801 | |
| 1802 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
| 1803 if (make_not_entrant && maybe_prior_recompile) { | |
| 1804 // More than one recompile at this point. | |
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1805 inc_recompile_count = maybe_prior_trap; |
| 0 | 1806 } |
| 1807 } else { | |
| 1808 // For reasons which are not recorded per-bytecode, we simply | |
| 1809 // force recompiles unconditionally. | |
| 1810 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
| 1811 make_not_entrant = true; | |
| 1812 } | |
| 1813 | |
| 1814 // Go back to the compiler if there are too many traps in this method. | |
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1815 if (this_trap_count >= per_method_trap_limit(reason)) { |
| 0 | 1816 // If there are too many traps in this method, force a recompile. |
| 1817 // This will allow the compiler to see the limit overflow, and | |
| 1818 // take corrective action, if possible. | |
| 1819 // (This condition is an unlikely backstop only, because the | |
| 1820 // PerBytecodeTrapLimit is more likely to take effect first, | |
| 1821 // if it is applicable.) | |
| 1822 make_not_entrant = true; | |
| 1823 } | |
| 1824 | |
| 1825 // Here's more hysteresis: If there has been a recompile at | |
| 1826 // this trap point already, run the method in the interpreter | |
| 1827 // for a while to exercise it more thoroughly. | |
| 1828 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
| 1783 | 1829 reprofile = true; |
| 0 | 1830 } |
| 1831 | |
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1832 } |
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1833 |
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1834 // Take requested actions on the method: |
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1835 |
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1836 // Recompile |
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1837 if (make_not_entrant) { |
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1838 if (!nm->make_not_entrant()) { |
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1839 return; // the call did not change nmethod's state |
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1840 } |
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1841 |
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1842 if (pdata != NULL) { |
| 0 | 1843 // Record the recompilation event, if any. |
| 1844 int tstate0 = pdata->trap_state(); | |
| 1845 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
| 1846 if (tstate1 != tstate0) | |
| 1847 pdata->set_trap_state(tstate1); | |
| 1848 } | |
| 17780 | 1849 |
| 1850 #if INCLUDE_RTM_OPT | |
| 1851 // Restart collecting RTM locking abort statistic if the method | |
| 1852 // is recompiled for a reason other than RTM state change. | |
| 1853 // Assume that in new recompiled code the statistic could be different, | |
| 1854 // for example, due to different inlining. | |
| 1855 if ((reason != Reason_rtm_state_change) && (trap_mdo != NULL) && | |
| 1856 UseRTMDeopt && (nm->rtm_state() != ProfileRTM)) { | |
| 1857 trap_mdo->atomic_set_rtm_state(ProfileRTM); | |
| 1858 } | |
| 1859 #endif | |
| 0 | 1860 } |
| 1861 | |
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1862 if (inc_recompile_count) { |
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1863 trap_mdo->inc_overflow_recompile_count(); |
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1864 if ((uint)trap_mdo->overflow_recompile_count() > |
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1865 (uint)PerBytecodeRecompilationCutoff) { |
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1866 // Give up on the method containing the bad BCI. |
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1867 if (trap_method() == nm->method()) { |
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1868 make_not_compilable = true; |
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1869 } else { |
| 7998 | 1870 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
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1871 // But give grace to the enclosing nm->method(). |
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1872 } |
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1873 } |
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1874 } |
| 0 | 1875 |
| 1783 | 1876 // Reprofile |
| 1877 if (reprofile) { | |
| 1878 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
| 0 | 1879 } |
| 1880 | |
| 1881 // Give up compiling | |
| 1783 | 1882 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
| 0 | 1883 assert(make_not_entrant, "consistent"); |
| 1783 | 1884 nm->method()->set_not_compilable(CompLevel_full_optimization); |
| 0 | 1885 } |
| 1886 | |
| 1887 } // Free marked resources | |
| 1888 | |
| 1889 } | |
| 1890 JRT_END | |
| 1891 | |
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1892 MethodData* |
| 0 | 1893 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
| 1894 bool create_if_missing) { | |
| 1895 Thread* THREAD = thread; | |
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1896 MethodData* mdo = m()->method_data(); |
| 0 | 1897 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
| 1898 // Build an MDO. Ignore errors like OutOfMemory; | |
| 1899 // that simply means we won't have an MDO to update. | |
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1900 Method::build_interpreter_method_data(m, THREAD); |
| 0 | 1901 if (HAS_PENDING_EXCEPTION) { |
| 1902 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
| 1903 CLEAR_PENDING_EXCEPTION; | |
| 1904 } | |
| 1905 mdo = m()->method_data(); | |
| 1906 } | |
| 1907 return mdo; | |
| 1908 } | |
| 1909 | |
| 1910 ProfileData* | |
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1911 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
| 0 | 1912 int trap_bci, |
| 1913 Deoptimization::DeoptReason reason, | |
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1914 bool update_total_trap_count, |
| 22298 | 1915 #if INCLUDE_JVMCI |
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1916 bool is_osr, |
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1917 #endif |
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1918 Method* compiled_method, |
| 0 | 1919 //outputs: |
| 1920 uint& ret_this_trap_count, | |
| 1921 bool& ret_maybe_prior_trap, | |
| 1922 bool& ret_maybe_prior_recompile) { | |
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1923 bool maybe_prior_trap = false; |
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1924 bool maybe_prior_recompile = false; |
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1925 uint this_trap_count = 0; |
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1926 if (update_total_trap_count) { |
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1927 uint idx = reason; |
| 22298 | 1928 #if INCLUDE_JVMCI |
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1929 if (is_osr) { |
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1930 idx += Reason_LIMIT; |
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1931 } |
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1932 #endif |
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1933 uint prior_trap_count = trap_mdo->trap_count(idx); |
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1934 this_trap_count = trap_mdo->inc_trap_count(idx); |
| 0 | 1935 |
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1936 // If the runtime cannot find a place to store trap history, |
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1937 // it is estimated based on the general condition of the method. |
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1938 // If the method has ever been recompiled, or has ever incurred |
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1939 // a trap with the present reason , then this BCI is assumed |
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1940 // (pessimistically) to be the culprit. |
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1941 maybe_prior_trap = (prior_trap_count != 0); |
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1942 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1943 } |
| 0 | 1944 ProfileData* pdata = NULL; |
| 1945 | |
| 1946 | |
| 1947 // For reasons which are recorded per bytecode, we check per-BCI data. | |
| 1948 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
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1949 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
| 0 | 1950 if (per_bc_reason != Reason_none) { |
| 1951 // Find the profile data for this BCI. If there isn't one, | |
| 1952 // try to allocate one from the MDO's set of spares. | |
| 1953 // This will let us detect a repeated trap at this point. | |
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1954 pdata = trap_mdo->allocate_bci_to_data(trap_bci, reason_is_speculate(reason) ? compiled_method : NULL); |
| 0 | 1955 |
| 1956 if (pdata != NULL) { | |
|
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1957 if (reason_is_speculate(reason) && !pdata->is_SpeculativeTrapData()) { |
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1958 if (LogCompilation && xtty != NULL) { |
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1959 ttyLocker ttyl; |
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1960 // no more room for speculative traps in this MDO |
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1961 xtty->elem("speculative_traps_oom"); |
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1962 } |
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1963 } |
| 0 | 1964 // Query the trap state of this profile datum. |
| 1965 int tstate0 = pdata->trap_state(); | |
| 1966 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
| 1967 maybe_prior_trap = false; | |
| 1968 if (!trap_state_is_recompiled(tstate0)) | |
| 1969 maybe_prior_recompile = false; | |
| 1970 | |
| 1971 // Update the trap state of this profile datum. | |
| 1972 int tstate1 = tstate0; | |
| 1973 // Record the reason. | |
| 1974 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
| 1975 // Store the updated state on the MDO, for next time. | |
| 1976 if (tstate1 != tstate0) | |
| 1977 pdata->set_trap_state(tstate1); | |
| 1978 } else { | |
|
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1979 if (LogCompilation && xtty != NULL) { |
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1980 ttyLocker ttyl; |
| 0 | 1981 // Missing MDP? Leave a small complaint in the log. |
| 1982 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1983 } |
| 0 | 1984 } |
| 1985 } | |
| 1986 | |
| 1987 // Return results: | |
| 1988 ret_this_trap_count = this_trap_count; | |
| 1989 ret_maybe_prior_trap = maybe_prior_trap; | |
| 1990 ret_maybe_prior_recompile = maybe_prior_recompile; | |
| 1991 return pdata; | |
| 1992 } | |
| 1993 | |
| 1994 void | |
|
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1995 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 0 | 1996 ResourceMark rm; |
| 1997 // Ignored outputs: | |
| 1998 uint ignore_this_trap_count; | |
| 1999 bool ignore_maybe_prior_trap; | |
| 2000 bool ignore_maybe_prior_recompile; | |
|
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2001 assert(!reason_is_speculate(reason), "reason speculate only used by compiler"); |
|
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2002 // JVMCI uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
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2003 bool update_total_counts = JVMCI_ONLY(false) NOT_JVMCI(true); |
| 0 | 2004 query_update_method_data(trap_mdo, trap_bci, |
| 2005 (DeoptReason)reason, | |
|
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2006 update_total_counts, |
| 22298 | 2007 #if INCLUDE_JVMCI |
|
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2008 false, |
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2009 #endif |
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2010 NULL, |
| 0 | 2011 ignore_this_trap_count, |
| 2012 ignore_maybe_prior_trap, | |
| 2013 ignore_maybe_prior_recompile); | |
| 2014 } | |
| 2015 | |
| 2016 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) { | |
|
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2017 if (TraceDeoptimization) { |
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2018 tty->print("Uncommon trap "); |
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2019 } |
| 0 | 2020 // Still in Java no safepoints |
| 2021 { | |
| 2022 // This enters VM and may safepoint | |
| 2023 uncommon_trap_inner(thread, trap_request); | |
| 2024 } | |
| 2025 return fetch_unroll_info_helper(thread); | |
| 2026 } | |
| 2027 | |
| 2028 // Local derived constants. | |
| 2029 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
| 2030 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
| 2031 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
| 2032 | |
| 2033 //---------------------------trap_state_reason--------------------------------- | |
| 2034 Deoptimization::DeoptReason | |
| 2035 Deoptimization::trap_state_reason(int trap_state) { | |
| 2036 // This assert provides the link between the width of DataLayout::trap_bits | |
| 2037 // and the encoding of "recorded" reasons. It ensures there are enough | |
| 2038 // bits to store all needed reasons in the per-BCI MDO profile. | |
| 2039 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
| 2040 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 2041 trap_state -= recompile_bit; | |
| 2042 if (trap_state == DS_REASON_MASK) { | |
| 2043 return Reason_many; | |
| 2044 } else { | |
| 2045 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
| 2046 return (DeoptReason)trap_state; | |
| 2047 } | |
| 2048 } | |
| 2049 //-------------------------trap_state_has_reason------------------------------- | |
| 2050 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
| 2051 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
| 2052 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
| 2053 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 2054 trap_state -= recompile_bit; | |
| 2055 if (trap_state == DS_REASON_MASK) { | |
| 2056 return -1; // true, unspecifically (bottom of state lattice) | |
| 2057 } else if (trap_state == reason) { | |
| 2058 return 1; // true, definitely | |
| 2059 } else if (trap_state == 0) { | |
| 2060 return 0; // false, definitely (top of state lattice) | |
| 2061 } else { | |
| 2062 return 0; // false, definitely | |
| 2063 } | |
| 2064 } | |
| 2065 //-------------------------trap_state_add_reason------------------------------- | |
| 2066 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
| 2067 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
| 2068 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 2069 trap_state -= recompile_bit; | |
| 2070 if (trap_state == DS_REASON_MASK) { | |
| 2071 return trap_state + recompile_bit; // already at state lattice bottom | |
| 2072 } else if (trap_state == reason) { | |
| 2073 return trap_state + recompile_bit; // the condition is already true | |
| 2074 } else if (trap_state == 0) { | |
| 2075 return reason + recompile_bit; // no condition has yet been true | |
| 2076 } else { | |
| 2077 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
| 2078 } | |
| 2079 } | |
| 2080 //-----------------------trap_state_is_recompiled------------------------------ | |
| 2081 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
| 2082 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
| 2083 } | |
| 2084 //-----------------------trap_state_set_recompiled----------------------------- | |
| 2085 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
| 2086 if (z) return trap_state | DS_RECOMPILE_BIT; | |
| 2087 else return trap_state & ~DS_RECOMPILE_BIT; | |
| 2088 } | |
| 2089 //---------------------------format_trap_state--------------------------------- | |
|
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2090 // This is used for debugging and diagnostics, including LogFile output. |
| 0 | 2091 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
| 2092 int trap_state) { | |
| 2093 DeoptReason reason = trap_state_reason(trap_state); | |
| 2094 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
| 2095 // Re-encode the state from its decoded components. | |
| 2096 int decoded_state = 0; | |
| 2097 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
| 2098 decoded_state = trap_state_add_reason(decoded_state, reason); | |
| 2099 if (recomp_flag) | |
| 2100 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
| 2101 // If the state re-encodes properly, format it symbolically. | |
| 2102 // Because this routine is used for debugging and diagnostics, | |
| 2103 // be robust even if the state is a strange value. | |
| 2104 size_t len; | |
| 2105 if (decoded_state != trap_state) { | |
| 2106 // Random buggy state that doesn't decode?? | |
| 2107 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
| 2108 } else { | |
| 2109 len = jio_snprintf(buf, buflen, "%s%s", | |
| 2110 trap_reason_name(reason), | |
| 2111 recomp_flag ? " recompiled" : ""); | |
| 2112 } | |
| 2113 if (len >= buflen) | |
| 2114 buf[buflen-1] = '\0'; | |
| 2115 return buf; | |
| 2116 } | |
| 2117 | |
| 2118 | |
| 2119 //--------------------------------statics-------------------------------------- | |
| 2120 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
| 2121 = Deoptimization::Action_reinterpret; | |
| 2122 const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = { | |
| 2123 // Note: Keep this in sync. with enum DeoptReason. | |
| 2124 "none", | |
| 2125 "null_check", | |
|
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2126 "null_assert" JVMCI_ONLY("_or_unreached0"), |
| 0 | 2127 "range_check", |
| 2128 "class_check", | |
| 2129 "array_check", | |
|
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2130 "intrinsic" JVMCI_ONLY("_or_type_checked_inlining"), |
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2131 "bimorphic" JVMCI_ONLY("_or_optimized_type_check"), |
| 0 | 2132 "unloaded", |
| 2133 "uninitialized", | |
| 2134 "unreached", | |
| 2135 "unhandled", | |
| 2136 "constraint", | |
| 2137 "div0_check", | |
| 1172 | 2138 "age", |
| 3345 | 2139 "predicate", |
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2140 "loop_limit_check", |
| 17780 | 2141 "speculate_class_check", |
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2142 "rtm_state_change", |
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2143 "unstable_if" |
| 22298 | 2144 #if INCLUDE_JVMCI |
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2145 "aliasing", |
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2146 "transfer_to_interpreter", |
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2147 "not_compiled_exception_handler", |
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2148 "unresolved", |
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2149 "jsr_mismatch" |
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2150 #endif |
| 0 | 2151 }; |
| 2152 const char* Deoptimization::_trap_action_name[Action_LIMIT] = { | |
| 2153 // Note: Keep this in sync. with enum DeoptAction. | |
| 2154 "none", | |
| 2155 "maybe_recompile", | |
| 2156 "reinterpret", | |
| 2157 "make_not_entrant", | |
| 2158 "make_not_compilable" | |
| 2159 }; | |
| 2160 | |
| 2161 const char* Deoptimization::trap_reason_name(int reason) { | |
| 2162 if (reason == Reason_many) return "many"; | |
| 2163 if ((uint)reason < Reason_LIMIT) | |
| 2164 return _trap_reason_name[reason]; | |
| 2165 static char buf[20]; | |
| 2166 sprintf(buf, "reason%d", reason); | |
| 2167 return buf; | |
| 2168 } | |
| 2169 const char* Deoptimization::trap_action_name(int action) { | |
| 2170 if ((uint)action < Action_LIMIT) | |
| 2171 return _trap_action_name[action]; | |
| 2172 static char buf[20]; | |
| 2173 sprintf(buf, "action%d", action); | |
| 2174 return buf; | |
| 2175 } | |
| 2176 | |
|
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2177 // This is used for debugging and diagnostics, including LogFile output. |
| 0 | 2178 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, |
| 2179 int trap_request) { | |
| 2180 jint unloaded_class_index = trap_request_index(trap_request); | |
| 2181 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
| 2182 const char* action = trap_action_name(trap_request_action(trap_request)); | |
| 22298 | 2183 #if INCLUDE_JVMCI |
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2184 int debug_id = trap_request_debug_id(trap_request); |
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2185 #endif |
| 0 | 2186 size_t len; |
| 2187 if (unloaded_class_index < 0) { | |
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2188 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" JVMCI_ONLY(" debug_id='%d'"), |
|
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2189 reason, action |
| 22298 | 2190 #if INCLUDE_JVMCI |
|
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2191 ,debug_id |
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2192 #endif |
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2193 ); |
| 0 | 2194 } else { |
|
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2195 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" JVMCI_ONLY(" debug_id='%d'"), |
|
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Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
2196 reason, action, unloaded_class_index |
| 22298 | 2197 #if INCLUDE_JVMCI |
|
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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
|
2198 ,debug_id |
|
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
2199 #endif |
|
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
2200 ); |
| 0 | 2201 } |
| 2202 if (len >= buflen) | |
| 2203 buf[buflen-1] = '\0'; | |
| 2204 return buf; | |
| 2205 } | |
| 2206 | |
| 2207 juint Deoptimization::_deoptimization_hist | |
| 2208 [Deoptimization::Reason_LIMIT] | |
| 2209 [1 + Deoptimization::Action_LIMIT] | |
| 2210 [Deoptimization::BC_CASE_LIMIT] | |
| 2211 = {0}; | |
| 2212 | |
| 2213 enum { | |
| 2214 LSB_BITS = 8, | |
| 2215 LSB_MASK = right_n_bits(LSB_BITS) | |
| 2216 }; | |
| 2217 | |
| 2218 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
| 2219 Bytecodes::Code bc) { | |
| 2220 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
| 2221 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
| 2222 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
| 2223 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
| 2224 juint* cases = _deoptimization_hist[reason][1+action]; | |
| 2225 juint* bc_counter_addr = NULL; | |
| 2226 juint bc_counter = 0; | |
| 2227 // Look for an unused counter, or an exact match to this BC. | |
| 2228 if (bc != Bytecodes::_illegal) { | |
| 2229 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
| 2230 juint* counter_addr = &cases[bc_case]; | |
| 2231 juint counter = *counter_addr; | |
| 2232 if ((counter == 0 && bc_counter_addr == NULL) | |
| 2233 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
| 2234 // this counter is either free or is already devoted to this BC | |
| 2235 bc_counter_addr = counter_addr; | |
| 2236 bc_counter = counter | bc; | |
| 2237 } | |
| 2238 } | |
| 2239 } | |
| 2240 if (bc_counter_addr == NULL) { | |
| 2241 // Overflow, or no given bytecode. | |
| 2242 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
| 2243 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
| 2244 } | |
| 2245 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
| 2246 } | |
| 2247 | |
| 2248 jint Deoptimization::total_deoptimization_count() { | |
| 2249 return _deoptimization_hist[Reason_none][0][0]; | |
| 2250 } | |
| 2251 | |
| 2252 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
| 2253 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
| 2254 return _deoptimization_hist[reason][0][0]; | |
| 2255 } | |
| 2256 | |
| 2257 void Deoptimization::print_statistics() { | |
| 2258 juint total = total_deoptimization_count(); | |
| 2259 juint account = total; | |
| 2260 if (total != 0) { | |
| 2261 ttyLocker ttyl; | |
| 2262 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
| 2263 tty->print_cr("Deoptimization traps recorded:"); | |
| 2264 #define PRINT_STAT_LINE(name, r) \ | |
| 2265 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
| 2266 PRINT_STAT_LINE("total", total); | |
| 2267 // For each non-zero entry in the histogram, print the reason, | |
| 2268 // the action, and (if specifically known) the type of bytecode. | |
| 2269 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
| 2270 for (int action = 0; action < Action_LIMIT; action++) { | |
| 2271 juint* cases = _deoptimization_hist[reason][1+action]; | |
| 2272 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
| 2273 juint counter = cases[bc_case]; | |
| 2274 if (counter != 0) { | |
| 2275 char name[1*K]; | |
| 2276 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
| 2277 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
| 2278 bc = Bytecodes::_illegal; | |
| 2279 sprintf(name, "%s/%s/%s", | |
| 2280 trap_reason_name(reason), | |
| 2281 trap_action_name(action), | |
| 2282 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
| 2283 juint r = counter >> LSB_BITS; | |
| 2284 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
| 2285 account -= r; | |
| 2286 } | |
| 2287 } | |
| 2288 } | |
| 2289 } | |
| 2290 if (account != 0) { | |
| 2291 PRINT_STAT_LINE("unaccounted", account); | |
| 2292 } | |
| 2293 #undef PRINT_STAT_LINE | |
| 2294 if (xtty != NULL) xtty->tail("statistics"); | |
| 2295 } | |
| 2296 } | |
| 22298 | 2297 #else // COMPILER2 || SHARK || INCLUDE_JVMCI |
| 0 | 2298 |
| 2299 | |
| 2300 // Stubs for C1 only system. | |
| 2301 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
| 2302 return false; | |
| 2303 } | |
| 2304 | |
| 2305 const char* Deoptimization::trap_reason_name(int reason) { | |
| 2306 return "unknown"; | |
| 2307 } | |
| 2308 | |
| 2309 void Deoptimization::print_statistics() { | |
| 2310 // no output | |
| 2311 } | |
| 2312 | |
| 2313 void | |
|
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
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2314 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 0 | 2315 // no udpate |
| 2316 } | |
| 2317 | |
| 2318 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
| 2319 return 0; | |
| 2320 } | |
| 2321 | |
| 2322 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
| 2323 Bytecodes::Code bc) { | |
| 2324 // no update | |
| 2325 } | |
| 2326 | |
| 2327 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
| 2328 int trap_state) { | |
| 2329 jio_snprintf(buf, buflen, "#%d", trap_state); | |
| 2330 return buf; | |
| 2331 } | |
| 2332 | |
| 22298 | 2333 #endif // COMPILER2 || SHARK || INCLUDE_JVMCI |