Mercurial > hg > truffle
annotate src/share/vm/runtime/deoptimization.cpp @ 9571:f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Mon, 06 May 2013 15:25:18 +0200 |
| parents | 314814fa0223 |
| children | 836a62f43af9 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "code/debugInfoRec.hpp" | |
| 28 #include "code/nmethod.hpp" | |
| 29 #include "code/pcDesc.hpp" | |
| 30 #include "code/scopeDesc.hpp" | |
| 31 #include "interpreter/bytecode.hpp" | |
| 32 #include "interpreter/interpreter.hpp" | |
| 33 #include "interpreter/oopMapCache.hpp" | |
| 34 #include "memory/allocation.inline.hpp" | |
| 35 #include "memory/oopFactory.hpp" | |
| 36 #include "memory/resourceArea.hpp" | |
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37 #include "oops/method.hpp" |
| 1972 | 38 #include "oops/oop.inline.hpp" |
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39 #include "oops/fieldStreams.hpp" |
| 1972 | 40 #include "prims/jvmtiThreadState.hpp" |
| 41 #include "runtime/biasedLocking.hpp" | |
| 42 #include "runtime/compilationPolicy.hpp" | |
| 43 #include "runtime/deoptimization.hpp" | |
| 44 #include "runtime/interfaceSupport.hpp" | |
| 45 #include "runtime/sharedRuntime.hpp" | |
| 46 #include "runtime/signature.hpp" | |
| 47 #include "runtime/stubRoutines.hpp" | |
| 48 #include "runtime/thread.hpp" | |
| 49 #include "runtime/vframe.hpp" | |
| 50 #include "runtime/vframeArray.hpp" | |
| 51 #include "runtime/vframe_hp.hpp" | |
| 52 #include "utilities/events.hpp" | |
| 53 #include "utilities/xmlstream.hpp" | |
| 54 #ifdef TARGET_ARCH_x86 | |
| 55 # include "vmreg_x86.inline.hpp" | |
| 56 #endif | |
| 57 #ifdef TARGET_ARCH_sparc | |
| 58 # include "vmreg_sparc.inline.hpp" | |
| 59 #endif | |
| 60 #ifdef TARGET_ARCH_zero | |
| 61 # include "vmreg_zero.inline.hpp" | |
| 62 #endif | |
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63 #ifdef TARGET_ARCH_arm |
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64 # include "vmreg_arm.inline.hpp" |
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65 #endif |
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66 #ifdef TARGET_ARCH_ppc |
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67 # include "vmreg_ppc.inline.hpp" |
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68 #endif |
| 1972 | 69 #ifdef COMPILER2 |
| 70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
| 71 # include "adfiles/ad_x86_32.hpp" | |
| 72 #endif | |
| 73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
| 74 # include "adfiles/ad_x86_64.hpp" | |
| 75 #endif | |
| 76 #ifdef TARGET_ARCH_MODEL_sparc | |
| 77 # include "adfiles/ad_sparc.hpp" | |
| 78 #endif | |
| 79 #ifdef TARGET_ARCH_MODEL_zero | |
| 80 # include "adfiles/ad_zero.hpp" | |
| 81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
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85 #ifdef TARGET_ARCH_MODEL_ppc |
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86 # include "adfiles/ad_ppc.hpp" |
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87 #endif |
| 1972 | 88 #endif |
| 0 | 89 |
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90 #ifdef GRAAL |
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91 #include "graal/graalCompiler.hpp" |
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92 #endif |
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93 |
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94 |
| 0 | 95 bool DeoptimizationMarker::_is_active = false; |
| 96 | |
| 97 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
| 98 int caller_adjustment, | |
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99 int caller_actual_parameters, |
| 0 | 100 int number_of_frames, |
| 101 intptr_t* frame_sizes, | |
| 102 address* frame_pcs, | |
| 103 BasicType return_type) { | |
| 104 _size_of_deoptimized_frame = size_of_deoptimized_frame; | |
| 105 _caller_adjustment = caller_adjustment; | |
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106 _caller_actual_parameters = caller_actual_parameters; |
| 0 | 107 _number_of_frames = number_of_frames; |
| 108 _frame_sizes = frame_sizes; | |
| 109 _frame_pcs = frame_pcs; | |
| 6197 | 110 _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler); |
| 0 | 111 _return_type = return_type; |
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112 _initial_info = 0; |
| 0 | 113 // PD (x86 only) |
| 114 _counter_temp = 0; | |
| 115 _unpack_kind = 0; | |
| 116 _sender_sp_temp = 0; | |
| 117 | |
| 118 _total_frame_sizes = size_of_frames(); | |
| 119 } | |
| 120 | |
| 121 | |
| 122 Deoptimization::UnrollBlock::~UnrollBlock() { | |
| 6197 | 123 FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes, mtCompiler); |
| 124 FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs, mtCompiler); | |
| 125 FREE_C_HEAP_ARRAY(intptr_t, _register_block, mtCompiler); | |
| 0 | 126 } |
| 127 | |
| 128 | |
| 129 intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { | |
| 130 assert(register_number < RegisterMap::reg_count, "checking register number"); | |
| 131 return &_register_block[register_number * 2]; | |
| 132 } | |
| 133 | |
| 134 | |
| 135 | |
| 136 int Deoptimization::UnrollBlock::size_of_frames() const { | |
| 137 // Acount first for the adjustment of the initial frame | |
| 138 int result = _caller_adjustment; | |
| 139 for (int index = 0; index < number_of_frames(); index++) { | |
| 140 result += frame_sizes()[index]; | |
| 141 } | |
| 142 return result; | |
| 143 } | |
| 144 | |
| 145 | |
| 146 void Deoptimization::UnrollBlock::print() { | |
| 147 ttyLocker ttyl; | |
| 148 tty->print_cr("UnrollBlock"); | |
| 149 tty->print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); | |
| 150 tty->print( " frame_sizes: "); | |
| 151 for (int index = 0; index < number_of_frames(); index++) { | |
| 152 tty->print("%d ", frame_sizes()[index]); | |
| 153 } | |
| 154 tty->cr(); | |
| 155 } | |
| 156 | |
| 157 | |
| 158 // In order to make fetch_unroll_info work properly with escape | |
| 159 // analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and | |
| 160 // ResetNoHandleMark and HandleMark were removed from it. The actual reallocation | |
| 161 // of previously eliminated objects occurs in realloc_objects, which is | |
| 162 // called from the method fetch_unroll_info_helper below. | |
| 163 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread)) | |
| 164 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
| 165 // but makes the entry a little slower. There is however a little dance we have to | |
| 166 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
| 167 | |
| 168 // fetch_unroll_info() is called at the beginning of the deoptimization | |
| 169 // handler. Note this fact before we start generating temporary frames | |
| 170 // that can confuse an asynchronous stack walker. This counter is | |
| 171 // decremented at the end of unpack_frames(). | |
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172 if (TraceDeoptimization) { |
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173 tty->print_cr("Deoptimizing thread " INTPTR_FORMAT, thread); |
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174 } |
| 0 | 175 thread->inc_in_deopt_handler(); |
| 176 | |
| 177 return fetch_unroll_info_helper(thread); | |
| 178 JRT_END | |
| 179 | |
| 180 | |
| 181 // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) | |
| 182 Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread) { | |
| 183 | |
| 184 // Note: there is a safepoint safety issue here. No matter whether we enter | |
| 185 // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once | |
| 186 // the vframeArray is created. | |
| 187 // | |
| 188 | |
| 189 // Allocate our special deoptimization ResourceMark | |
| 190 DeoptResourceMark* dmark = new DeoptResourceMark(thread); | |
| 191 assert(thread->deopt_mark() == NULL, "Pending deopt!"); | |
| 192 thread->set_deopt_mark(dmark); | |
| 193 | |
| 194 frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect | |
| 195 RegisterMap map(thread, true); | |
| 196 RegisterMap dummy_map(thread, false); | |
| 197 // Now get the deoptee with a valid map | |
| 198 frame deoptee = stub_frame.sender(&map); | |
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199 // Set the deoptee nmethod |
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200 assert(thread->deopt_nmethod() == NULL, "Pending deopt!"); |
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201 thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null()); |
| 0 | 202 |
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203 if (VerifyStack) { |
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204 thread->validate_frame_layout(); |
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205 } |
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206 |
| 0 | 207 // Create a growable array of VFrames where each VFrame represents an inlined |
| 208 // Java frame. This storage is allocated with the usual system arena. | |
| 209 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
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210 |
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211 #ifdef GRAAL |
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212 nmethod* nm = (nmethod*) deoptee.cb(); |
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213 GraalCompiler* compiler = (GraalCompiler*) nm->compiler(); |
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214 for (jlong* p = nm->leaf_graph_ids_begin(); p != nm->leaf_graph_ids_end(); p++) { |
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215 compiler->deopt_leaf_graph(*p); |
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216 } |
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217 if (PrintDeoptimizationDetails) { |
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218 tty->print("leaf graph ids: "); |
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219 for (jlong* p = nm->leaf_graph_ids_begin(); p != nm->leaf_graph_ids_end(); p++) { |
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220 tty->print("%d ", *p); |
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221 } |
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222 tty->cr(); |
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223 } |
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224 #endif |
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225 |
| 0 | 226 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); |
| 227 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
| 228 while (!vf->is_top()) { | |
| 229 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
| 230 chunk->push(compiledVFrame::cast(vf)); | |
| 231 vf = vf->sender(); | |
| 232 } | |
| 233 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
| 234 chunk->push(compiledVFrame::cast(vf)); | |
| 235 | |
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236 #if defined(COMPILER2) || defined(GRAAL) |
| 0 | 237 // Reallocate the non-escaping objects and restore their fields. Then |
| 238 // relock objects if synchronization on them was eliminated. | |
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239 #ifdef COMPILER2 |
| 4777 | 240 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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241 if (EliminateAllocations) { |
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242 #endif // COMPILER2 |
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243 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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244 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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245 |
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246 // The flag return_oop() indicates call sites which return oop |
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247 // in compiled code. Such sites include java method calls, |
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248 // runtime calls (for example, used to allocate new objects/arrays |
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249 // on slow code path) and any other calls generated in compiled code. |
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250 // It is not guaranteed that we can get such information here only |
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251 // by analyzing bytecode in deoptimized frames. This is why this flag |
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252 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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253 bool save_oop_result = chunk->at(0)->scope()->return_oop(); |
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254 Handle return_value; |
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255 if (save_oop_result) { |
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256 // Reallocation may trigger GC. If deoptimization happened on return from |
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257 // call which returns oop we need to save it since it is not in oopmap. |
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258 oop result = deoptee.saved_oop_result(&map); |
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259 assert(result == NULL || result->is_oop(), "must be oop"); |
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260 return_value = Handle(thread, result); |
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261 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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262 if (TraceDeoptimization) { |
| 6843 | 263 ttyLocker ttyl; |
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264 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, result, thread); |
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265 } |
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266 } |
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267 bool reallocated = false; |
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268 if (objects != NULL) { |
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269 JRT_BLOCK |
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270 reallocated = realloc_objects(thread, &deoptee, objects, THREAD); |
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271 JRT_END |
| 0 | 272 } |
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273 if (reallocated) { |
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274 reassign_fields(&deoptee, &map, objects); |
| 0 | 275 #ifndef PRODUCT |
| 276 if (TraceDeoptimization) { | |
| 277 ttyLocker ttyl; | |
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278 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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279 print_objects(objects); |
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280 } |
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281 #endif |
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282 } |
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283 if (save_oop_result) { |
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284 // Restore result. |
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285 deoptee.set_saved_oop_result(&map, return_value()); |
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286 } |
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287 #ifdef COMPILER2 |
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288 } |
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289 if (EliminateLocks) { |
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290 #endif // COMPILER2 |
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291 #ifndef PRODUCT |
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292 bool first = true; |
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293 #endif |
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294 for (int i = 0; i < chunk->length(); i++) { |
|
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295 compiledVFrame* cvf = chunk->at(i); |
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296 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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297 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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298 if (monitors->is_nonempty()) { |
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299 relock_objects(monitors, thread); |
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300 #ifndef PRODUCT |
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301 if (PrintDeoptimizationDetails) { |
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302 ttyLocker ttyl; |
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303 for (int j = 0; j < monitors->length(); j++) { |
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304 MonitorInfo* mi = monitors->at(j); |
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305 if (mi->eliminated()) { |
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306 if (first) { |
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307 first = false; |
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308 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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309 } |
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310 tty->print_cr(" object <" INTPTR_FORMAT "> locked", mi->owner()); |
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311 } |
| 0 | 312 } |
| 313 } | |
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314 #endif // !PRODUCT |
| 0 | 315 } |
| 316 } | |
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317 #ifdef COMPILER2 |
| 0 | 318 } |
| 319 } | |
| 320 #endif // COMPILER2 | |
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321 #endif // COMPILER2 || GRAAL |
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322 |
| 0 | 323 // Ensure that no safepoint is taken after pointers have been stored |
| 324 // in fields of rematerialized objects. If a safepoint occurs from here on | |
| 325 // out the java state residing in the vframeArray will be missed. | |
| 326 No_Safepoint_Verifier no_safepoint; | |
| 327 | |
| 328 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk); | |
| 329 | |
| 330 assert(thread->vframe_array_head() == NULL, "Pending deopt!");; | |
| 331 thread->set_vframe_array_head(array); | |
| 332 | |
| 333 // Now that the vframeArray has been created if we have any deferred local writes | |
| 334 // added by jvmti then we can free up that structure as the data is now in the | |
| 335 // vframeArray | |
| 336 | |
| 337 if (thread->deferred_locals() != NULL) { | |
| 338 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
| 339 int i = 0; | |
| 340 do { | |
| 341 // Because of inlining we could have multiple vframes for a single frame | |
| 342 // and several of the vframes could have deferred writes. Find them all. | |
| 343 if (list->at(i)->id() == array->original().id()) { | |
| 344 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
| 345 list->remove_at(i); | |
| 346 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
| 347 delete dlv; | |
| 348 } else { | |
| 349 i++; | |
| 350 } | |
| 351 } while ( i < list->length() ); | |
| 352 if (list->length() == 0) { | |
| 353 thread->set_deferred_locals(NULL); | |
| 354 // free the list and elements back to C heap. | |
| 355 delete list; | |
| 356 } | |
| 357 | |
| 358 } | |
| 359 | |
| 1692 | 360 #ifndef SHARK |
| 0 | 361 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
| 362 CodeBlob* cb = stub_frame.cb(); | |
| 363 // Verify we have the right vframeArray | |
| 364 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
| 365 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
| 366 | |
| 1204 | 367 // If the deopt call site is a MethodHandle invoke call site we have |
| 368 // to adjust the unpack_sp. | |
| 369 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
| 370 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
| 371 unpack_sp = deoptee.unextended_sp(); | |
| 372 | |
| 0 | 373 #ifdef ASSERT |
| 374 assert(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub(), "just checking"); | |
| 375 #endif | |
| 1692 | 376 #else |
| 377 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
| 378 #endif // !SHARK | |
| 379 | |
| 0 | 380 // This is a guarantee instead of an assert because if vframe doesn't match |
| 381 // we will unpack the wrong deoptimized frame and wind up in strange places | |
| 382 // where it will be very difficult to figure out what went wrong. Better | |
| 383 // to die an early death here than some very obscure death later when the | |
| 384 // trail is cold. | |
| 385 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
| 386 // in that it will fail to detect a problem when there is one. This needs | |
| 387 // more work in tiger timeframe. | |
| 388 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
| 389 | |
| 390 int number_of_frames = array->frames(); | |
| 391 | |
| 392 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
| 393 // virtual activation, which is the reverse of the elements in the vframes array. | |
| 6197 | 394 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
| 0 | 395 // +1 because we always have an interpreter return address for the final slot. |
| 6197 | 396 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
| 0 | 397 int popframe_extra_args = 0; |
| 398 // Create an interpreter return address for the stub to use as its return | |
| 399 // address so the skeletal frames are perfectly walkable | |
| 400 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
| 401 | |
| 402 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
| 403 // activation be put back on the expression stack of the caller for reexecution | |
| 404 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
| 405 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
| 406 } | |
| 407 | |
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408 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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409 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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410 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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411 // |
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412 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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413 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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414 |
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415 // It's possible that the number of paramters at the call site is |
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416 // different than number of arguments in the callee when method |
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417 // handles are used. If the caller is interpreted get the real |
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418 // value so that the proper amount of space can be added to it's |
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419 // frame. |
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420 bool caller_was_method_handle = false; |
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421 if (deopt_sender.is_interpreted_frame()) { |
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422 methodHandle method = deopt_sender.interpreter_frame_method(); |
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423 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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424 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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425 // Method handle invokes may involve fairly arbitrary chains of |
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426 // calls so it's impossible to know how much actual space the |
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427 // caller has for locals. |
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428 caller_was_method_handle = true; |
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429 } |
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430 } |
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431 |
| 0 | 432 // |
| 433 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
| 434 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
| 435 // frame_sizes/frame_pcs[n] youngest frame (int) | |
| 436 // | |
| 437 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
| 438 // owns the space for the return address to it's caller). Confusing ain't it. | |
| 439 // | |
| 440 // The vframe array can address vframes with indices running from | |
| 441 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
| 442 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
| 443 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
| 444 // so things look a little strange in this loop. | |
| 445 // | |
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446 int callee_parameters = 0; |
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447 int callee_locals = 0; |
| 0 | 448 for (int index = 0; index < array->frames(); index++ ) { |
| 449 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
| 450 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
| 451 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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452 int caller_parms = callee_parameters; |
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453 if ((index == array->frames() - 1) && caller_was_method_handle) { |
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454 caller_parms = 0; |
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455 } |
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456 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(caller_parms, |
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457 callee_parameters, |
| 0 | 458 callee_locals, |
| 459 index == 0, | |
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460 index == array->frames() - 1, |
| 0 | 461 popframe_extra_args); |
| 462 // This pc doesn't have to be perfect just good enough to identify the frame | |
| 463 // as interpreted so the skeleton frame will be walkable | |
| 464 // The correct pc will be set when the skeleton frame is completely filled out | |
| 465 // The final pc we store in the loop is wrong and will be overwritten below | |
| 466 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
| 467 | |
| 468 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
| 469 callee_locals = array->element(index)->method()->max_locals(); | |
| 470 popframe_extra_args = 0; | |
| 471 } | |
| 472 | |
| 473 // Compute whether the root vframe returns a float or double value. | |
| 474 BasicType return_type; | |
| 475 { | |
| 476 HandleMark hm; | |
| 477 methodHandle method(thread, array->element(0)->method()); | |
| 2142 | 478 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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479 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
| 0 | 480 } |
| 481 | |
| 482 // Compute information for handling adapters and adjusting the frame size of the caller. | |
| 483 int caller_adjustment = 0; | |
| 484 | |
| 485 // Compute the amount the oldest interpreter frame will have to adjust | |
| 486 // its caller's stack by. If the caller is a compiled frame then | |
| 487 // we pretend that the callee has no parameters so that the | |
| 488 // extension counts for the full amount of locals and not just | |
| 489 // locals-parms. This is because without a c2i adapter the parm | |
| 490 // area as created by the compiled frame will not be usable by | |
| 491 // the interpreter. (Depending on the calling convention there | |
| 492 // may not even be enough space). | |
| 493 | |
| 494 // QQQ I'd rather see this pushed down into last_frame_adjust | |
| 495 // and have it take the sender (aka caller). | |
| 496 | |
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497 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
| 0 | 498 caller_adjustment = last_frame_adjust(0, callee_locals); |
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499 } else if (callee_locals > callee_parameters) { |
| 0 | 500 // The caller frame may need extending to accommodate |
| 501 // non-parameter locals of the first unpacked interpreted frame. | |
| 502 // Compute that adjustment. | |
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503 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
| 0 | 504 } |
| 505 | |
| 506 // If the sender is deoptimized the we must retrieve the address of the handler | |
| 507 // since the frame will "magically" show the original pc before the deopt | |
| 508 // and we'd undo the deopt. | |
| 509 | |
| 510 frame_pcs[0] = deopt_sender.raw_pc(); | |
| 511 | |
| 1692 | 512 #ifndef SHARK |
| 0 | 513 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
| 1692 | 514 #endif // SHARK |
| 0 | 515 |
| 516 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, | |
| 517 caller_adjustment * BytesPerWord, | |
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518 caller_was_method_handle ? 0 : callee_parameters, |
| 0 | 519 number_of_frames, |
| 520 frame_sizes, | |
| 521 frame_pcs, | |
| 522 return_type); | |
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523 // On some platforms, we need a way to pass some platform dependent |
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524 // information to the unpacking code so the skeletal frames come out |
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525 // correct (initial fp value, unextended sp, ...) |
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526 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
| 0 | 527 |
| 528 if (array->frames() > 1) { | |
| 529 if (VerifyStack && TraceDeoptimization) { | |
| 6843 | 530 ttyLocker ttyl; |
| 0 | 531 tty->print_cr("Deoptimizing method containing inlining"); |
| 532 } | |
| 533 } | |
| 534 | |
| 535 array->set_unroll_block(info); | |
| 536 return info; | |
| 537 } | |
| 538 | |
| 539 // Called to cleanup deoptimization data structures in normal case | |
| 540 // after unpacking to stack and when stack overflow error occurs | |
| 541 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
| 542 vframeArray *array) { | |
| 543 | |
| 544 // Get array if coming from exception | |
| 545 if (array == NULL) { | |
| 546 array = thread->vframe_array_head(); | |
| 547 } | |
| 548 thread->set_vframe_array_head(NULL); | |
| 549 | |
| 550 // Free the previous UnrollBlock | |
| 551 vframeArray* old_array = thread->vframe_array_last(); | |
| 552 thread->set_vframe_array_last(array); | |
| 553 | |
| 554 if (old_array != NULL) { | |
| 555 UnrollBlock* old_info = old_array->unroll_block(); | |
| 556 old_array->set_unroll_block(NULL); | |
| 557 delete old_info; | |
| 558 delete old_array; | |
| 559 } | |
| 560 | |
| 561 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
| 562 // inside the vframeArray (StackValueCollections) | |
| 563 | |
| 564 delete thread->deopt_mark(); | |
| 565 thread->set_deopt_mark(NULL); | |
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566 thread->set_deopt_nmethod(NULL); |
| 0 | 567 |
| 568 | |
| 569 if (JvmtiExport::can_pop_frame()) { | |
| 570 #ifndef CC_INTERP | |
| 571 // Regardless of whether we entered this routine with the pending | |
| 572 // popframe condition bit set, we should always clear it now | |
| 573 thread->clear_popframe_condition(); | |
| 574 #else | |
| 575 // C++ interpeter will clear has_pending_popframe when it enters | |
| 576 // with method_resume. For deopt_resume2 we clear it now. | |
| 577 if (thread->popframe_forcing_deopt_reexecution()) | |
| 578 thread->clear_popframe_condition(); | |
| 579 #endif /* CC_INTERP */ | |
| 580 } | |
| 581 | |
| 582 // unpack_frames() is called at the end of the deoptimization handler | |
| 583 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
| 584 // so that an asynchronous stack walker can work again. This counter is | |
| 585 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
| 586 // the beginning of uncommon_trap(). | |
| 587 thread->dec_in_deopt_handler(); | |
| 588 } | |
| 589 | |
| 590 | |
| 591 // Return BasicType of value being returned | |
| 592 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
| 593 | |
| 594 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
| 595 // allocate will be freed at the end of the routine. | |
| 596 | |
| 597 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
| 598 // but makes the entry a little slower. There is however a little dance we have to | |
| 599 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
| 600 ResetNoHandleMark rnhm; // No-op in release/product versions | |
| 601 HandleMark hm; | |
| 602 | |
| 603 frame stub_frame = thread->last_frame(); | |
| 604 | |
| 605 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
| 606 // must point to the vframeArray for the unpack frame. | |
| 607 vframeArray* array = thread->vframe_array_head(); | |
| 608 | |
| 609 #ifndef PRODUCT | |
| 610 if (TraceDeoptimization) { | |
| 6843 | 611 ttyLocker ttyl; |
| 0 | 612 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
| 613 } | |
| 614 #endif | |
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615 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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616 stub_frame.pc(), stub_frame.sp(), exec_mode); |
| 0 | 617 |
| 618 UnrollBlock* info = array->unroll_block(); | |
| 619 | |
| 620 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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621 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
| 0 | 622 |
| 623 BasicType bt = info->return_type(); | |
| 624 | |
| 625 // If we have an exception pending, claim that the return type is an oop | |
| 626 // so the deopt_blob does not overwrite the exception_oop. | |
| 627 | |
| 628 if (exec_mode == Unpack_exception) | |
| 629 bt = T_OBJECT; | |
| 630 | |
| 631 // Cleanup thread deopt data | |
| 632 cleanup_deopt_info(thread, array); | |
| 633 | |
| 634 #ifndef PRODUCT | |
| 635 if (VerifyStack) { | |
| 636 ResourceMark res_mark; | |
| 637 | |
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638 thread->validate_frame_layout(); |
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639 |
| 0 | 640 // Verify that the just-unpacked frames match the interpreter's |
| 641 // notions of expression stack and locals | |
| 642 vframeArray* cur_array = thread->vframe_array_last(); | |
| 643 RegisterMap rm(thread, false); | |
| 644 rm.set_include_argument_oops(false); | |
| 645 bool is_top_frame = true; | |
| 646 int callee_size_of_parameters = 0; | |
| 647 int callee_max_locals = 0; | |
| 648 for (int i = 0; i < cur_array->frames(); i++) { | |
| 649 vframeArrayElement* el = cur_array->element(i); | |
| 650 frame* iframe = el->iframe(); | |
| 651 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
| 652 | |
| 653 // Get the oop map for this bci | |
| 654 InterpreterOopMap mask; | |
| 655 int cur_invoke_parameter_size = 0; | |
| 656 bool try_next_mask = false; | |
| 657 int next_mask_expression_stack_size = -1; | |
| 658 int top_frame_expression_stack_adjustment = 0; | |
| 659 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
| 660 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
| 661 BytecodeStream str(mh); | |
| 662 str.set_start(iframe->interpreter_frame_bci()); | |
| 663 int max_bci = mh->code_size(); | |
| 664 // Get to the next bytecode if possible | |
| 665 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
| 666 // Check to see if we can grab the number of outgoing arguments | |
| 667 // at an uncommon trap for an invoke (where the compiler | |
| 668 // generates debug info before the invoke has executed) | |
| 669 Bytecodes::Code cur_code = str.next(); | |
| 670 if (cur_code == Bytecodes::_invokevirtual || | |
| 671 cur_code == Bytecodes::_invokespecial || | |
| 672 cur_code == Bytecodes::_invokestatic || | |
| 673 cur_code == Bytecodes::_invokeinterface) { | |
| 2142 | 674 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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675 Symbol* signature = invoke.signature(); |
| 0 | 676 ArgumentSizeComputer asc(signature); |
| 677 cur_invoke_parameter_size = asc.size(); | |
| 678 if (cur_code != Bytecodes::_invokestatic) { | |
| 679 // Add in receiver | |
| 680 ++cur_invoke_parameter_size; | |
| 681 } | |
| 682 } | |
| 683 if (str.bci() < max_bci) { | |
| 684 Bytecodes::Code bc = str.next(); | |
| 685 if (bc >= 0) { | |
| 686 // The interpreter oop map generator reports results before | |
| 687 // the current bytecode has executed except in the case of | |
| 688 // calls. It seems to be hard to tell whether the compiler | |
| 689 // has emitted debug information matching the "state before" | |
| 690 // a given bytecode or the state after, so we try both | |
| 691 switch (cur_code) { | |
| 692 case Bytecodes::_invokevirtual: | |
| 693 case Bytecodes::_invokespecial: | |
| 694 case Bytecodes::_invokestatic: | |
| 695 case Bytecodes::_invokeinterface: | |
| 696 case Bytecodes::_athrow: | |
| 697 break; | |
| 698 default: { | |
| 699 InterpreterOopMap next_mask; | |
| 700 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
| 701 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
| 702 // Need to subtract off the size of the result type of | |
| 703 // the bytecode because this is not described in the | |
| 704 // debug info but returned to the interpreter in the TOS | |
| 705 // caching register | |
| 706 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
| 707 if (bytecode_result_type != T_ILLEGAL) { | |
| 708 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
| 709 } | |
| 710 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
| 711 try_next_mask = true; | |
| 712 break; | |
| 713 } | |
| 714 } | |
| 715 } | |
| 716 } | |
| 717 | |
| 718 // Verify stack depth and oops in frame | |
| 719 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
| 720 if (!( | |
| 721 /* SPARC */ | |
| 722 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
| 723 /* x86 */ | |
| 724 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
| 725 (try_next_mask && | |
| 726 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
| 727 top_frame_expression_stack_adjustment))) || | |
| 728 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
| 729 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute) && | |
| 730 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) | |
| 731 )) { | |
| 732 ttyLocker ttyl; | |
| 733 | |
| 734 // Print out some information that will help us debug the problem | |
| 735 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
| 736 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
| 737 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
| 738 iframe->interpreter_frame_expression_stack_size()); | |
| 739 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
| 740 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
| 741 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
| 742 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
| 743 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
| 744 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
| 745 tty->print_cr(" exec_mode = %d", exec_mode); | |
| 746 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
| 747 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
| 748 tty->print_cr(" Interpreted frames:"); | |
| 749 for (int k = 0; k < cur_array->frames(); k++) { | |
| 750 vframeArrayElement* el = cur_array->element(k); | |
| 751 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
| 752 } | |
| 753 cur_array->print_on_2(tty); | |
| 754 guarantee(false, "wrong number of expression stack elements during deopt"); | |
| 755 } | |
| 756 VerifyOopClosure verify; | |
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757 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
| 0 | 758 callee_size_of_parameters = mh->size_of_parameters(); |
| 759 callee_max_locals = mh->max_locals(); | |
| 760 is_top_frame = false; | |
| 761 } | |
| 762 } | |
| 763 #endif /* !PRODUCT */ | |
| 764 | |
| 765 | |
| 766 return bt; | |
| 767 JRT_END | |
| 768 | |
| 769 | |
| 770 int Deoptimization::deoptimize_dependents() { | |
| 771 Threads::deoptimized_wrt_marked_nmethods(); | |
| 772 return 0; | |
| 773 } | |
| 774 | |
| 775 | |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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776 #if defined(COMPILER2) || defined(GRAAL) |
| 0 | 777 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
| 778 Handle pending_exception(thread->pending_exception()); | |
| 779 const char* exception_file = thread->exception_file(); | |
| 780 int exception_line = thread->exception_line(); | |
| 781 thread->clear_pending_exception(); | |
| 782 | |
| 783 for (int i = 0; i < objects->length(); i++) { | |
| 784 assert(objects->at(i)->is_object(), "invalid debug information"); | |
| 785 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
| 786 | |
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787 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 788 oop obj = NULL; |
| 789 | |
| 790 if (k->oop_is_instance()) { | |
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791 InstanceKlass* ik = InstanceKlass::cast(k()); |
| 0 | 792 obj = ik->allocate_instance(CHECK_(false)); |
| 793 } else if (k->oop_is_typeArray()) { | |
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794 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
| 0 | 795 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
| 796 int len = sv->field_size() / type2size[ak->element_type()]; | |
| 797 obj = ak->allocate(len, CHECK_(false)); | |
| 798 } else if (k->oop_is_objArray()) { | |
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799 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
| 0 | 800 obj = ak->allocate(sv->field_size(), CHECK_(false)); |
| 801 } | |
| 802 | |
| 803 assert(obj != NULL, "allocation failed"); | |
| 804 assert(sv->value().is_null(), "redundant reallocation"); | |
| 805 sv->set_value(obj); | |
| 806 } | |
| 807 | |
| 808 if (pending_exception.not_null()) { | |
| 809 thread->set_pending_exception(pending_exception(), exception_file, exception_line); | |
| 810 } | |
| 811 | |
| 812 return true; | |
| 813 } | |
| 814 | |
| 815 // restore elements of an eliminated type array | |
| 816 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
| 817 int index = 0; | |
|
44
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|
818 intptr_t val; |
| 0 | 819 |
| 820 for (int i = 0; i < sv->field_size(); i++) { | |
| 821 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
| 822 switch(type) { | |
|
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|
823 case T_LONG: case T_DOUBLE: { |
|
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|
824 assert(value->type() == T_INT, "Agreement."); |
|
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|
825 StackValue* low = |
|
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|
826 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
|
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|
827 #ifdef _LP64 |
|
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|
828 jlong res = (jlong)low->get_int(); |
|
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diff
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|
829 #else |
|
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|
830 #ifdef SPARC |
|
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|
831 // For SPARC we have to swap high and low words. |
|
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|
832 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
|
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|
833 #else |
|
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|
834 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
|
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|
835 #endif //SPARC |
|
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|
836 #endif |
|
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|
837 obj->long_at_put(index, res); |
|
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|
838 break; |
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|
839 } |
|
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|
840 |
|
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|
841 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
|
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|
842 case T_INT: case T_FLOAT: // 4 bytes. |
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|
843 assert(value->type() == T_INT, "Agreement."); |
|
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|
844 val = value->get_int(); |
|
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|
845 obj->int_at_put(index, (jint)*((jint*)&val)); |
|
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|
846 break; |
|
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|
847 |
|
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|
848 case T_SHORT: case T_CHAR: // 2 bytes |
|
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|
849 assert(value->type() == T_INT, "Agreement."); |
|
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|
850 val = value->get_int(); |
|
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|
851 obj->short_at_put(index, (jshort)*((jint*)&val)); |
|
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|
852 break; |
|
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|
853 |
|
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|
854 case T_BOOLEAN: case T_BYTE: // 1 byte |
|
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|
855 assert(value->type() == T_INT, "Agreement."); |
|
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|
856 val = value->get_int(); |
|
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|
857 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
|
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|
858 break; |
|
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|
859 |
| 0 | 860 default: |
| 861 ShouldNotReachHere(); | |
| 862 } | |
| 863 index++; | |
| 864 } | |
| 865 } | |
| 866 | |
| 867 // restore fields of an eliminated object array | |
| 868 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
| 869 for (int i = 0; i < sv->field_size(); i++) { | |
| 870 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
| 871 assert(value->type() == T_OBJECT, "object element expected"); | |
| 872 obj->obj_at_put(i, value->get_obj()()); | |
| 873 } | |
| 874 } | |
| 875 | |
| 7222 | 876 class ReassignedField { |
| 877 public: | |
| 878 int _offset; | |
| 879 BasicType _type; | |
| 880 public: | |
| 881 ReassignedField() { | |
| 882 _offset = 0; | |
| 883 _type = T_ILLEGAL; | |
| 884 } | |
| 885 }; | |
|
7137
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|
886 |
|
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|
887 int compare(ReassignedField* left, ReassignedField* right) { |
| 7222 | 888 return left->_offset - right->_offset; |
|
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|
889 } |
|
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|
890 |
|
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Doug Simon <doug.simon@oracle.com>
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|
891 // Restore fields of an eliminated instance object using the same field order |
|
7084
9ba90252ce08
HotSpotResolvedJavaType is now the HotSpot implementation of ResolvedJavaType,
Gilles Duboscq <duboscq@ssw.jku.at>
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|
892 // returned by HotSpotResolvedObjectType.getInstanceFields(true) |
|
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|
893 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj) { |
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894 if (klass->superklass() != NULL) { |
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|
895 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj); |
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896 } |
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|
897 |
|
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|
898 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
|
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|
899 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
|
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|
900 if (!fs.access_flags().is_static()) { |
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|
901 ReassignedField field; |
| 7222 | 902 field._offset = fs.offset(); |
| 903 field._type = FieldType::basic_type(fs.signature()); | |
|
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|
904 fields->append(field); |
|
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|
905 } |
|
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|
906 } |
|
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|
907 fields->sort(compare); |
|
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|
908 for (int i = 0; i < fields->length(); i++) { |
|
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|
909 intptr_t val; |
|
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Doug Simon <doug.simon@oracle.com>
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|
910 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(svIndex)); |
| 7222 | 911 int offset = fields->at(i)._offset; |
| 912 BasicType type = fields->at(i)._type; | |
|
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|
913 switch (type) { |
|
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Doug Simon <doug.simon@oracle.com>
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|
914 case T_OBJECT: case T_ARRAY: |
|
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Doug Simon <doug.simon@oracle.com>
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|
915 assert(value->type() == T_OBJECT, "Agreement."); |
|
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Doug Simon <doug.simon@oracle.com>
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|
916 obj->obj_field_put(offset, value->get_obj()()); |
|
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Doug Simon <doug.simon@oracle.com>
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|
917 break; |
|
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|
918 |
|
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Doug Simon <doug.simon@oracle.com>
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|
919 case T_LONG: case T_DOUBLE: { |
|
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Doug Simon <doug.simon@oracle.com>
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|
920 assert(value->type() == T_INT, "Agreement."); |
|
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Doug Simon <doug.simon@oracle.com>
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|
921 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
|
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Doug Simon <doug.simon@oracle.com>
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|
922 #ifdef _LP64 |
|
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Doug Simon <doug.simon@oracle.com>
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|
923 jlong res = (jlong)low->get_int(); |
|
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Doug Simon <doug.simon@oracle.com>
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|
924 #else |
|
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Doug Simon <doug.simon@oracle.com>
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|
925 #ifdef SPARC |
|
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Doug Simon <doug.simon@oracle.com>
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|
926 // For SPARC we have to swap high and low words. |
|
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Doug Simon <doug.simon@oracle.com>
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|
927 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
|
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
diff
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|
928 #else |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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|
929 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
|
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
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|
930 #endif //SPARC |
|
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Doug Simon <doug.simon@oracle.com>
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|
931 #endif |
|
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diff
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|
932 obj->long_field_put(offset, res); |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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|
933 break; |
|
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
diff
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|
934 } |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
935 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
936 case T_INT: case T_FLOAT: // 4 bytes. |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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|
937 assert(value->type() == T_INT, "Agreement."); |
|
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|
938 val = value->get_int(); |
|
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Doug Simon <doug.simon@oracle.com>
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|
939 obj->int_field_put(offset, (jint)*((jint*)&val)); |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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|
940 break; |
|
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|
941 |
|
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
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|
942 case T_SHORT: case T_CHAR: // 2 bytes |
|
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
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|
943 assert(value->type() == T_INT, "Agreement."); |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
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|
944 val = value->get_int(); |
|
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
diff
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|
945 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
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|
946 break; |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
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|
947 |
|
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
948 case T_BOOLEAN: case T_BYTE: // 1 byte |
|
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949 assert(value->type() == T_INT, "Agreement."); |
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950 val = value->get_int(); |
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951 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
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952 break; |
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953 |
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954 default: |
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955 ShouldNotReachHere(); |
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956 } |
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957 svIndex++; |
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958 } |
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959 return svIndex; |
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960 } |
| 0 | 961 |
| 962 // restore fields of all eliminated objects and arrays | |
| 963 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects) { | |
| 964 for (int i = 0; i < objects->length(); i++) { | |
| 965 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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966 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 967 Handle obj = sv->value(); |
| 968 assert(obj.not_null(), "reallocation was missed"); | |
|
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969 if (PrintDeoptimizationDetails) { |
|
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970 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
|
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971 } |
| 0 | 972 |
| 973 if (k->oop_is_instance()) { | |
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974 InstanceKlass* ik = InstanceKlass::cast(k()); |
|
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975 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj()); |
| 0 | 976 } else if (k->oop_is_typeArray()) { |
|
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977 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
| 0 | 978 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
| 979 } else if (k->oop_is_objArray()) { | |
| 980 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
| 981 } | |
| 982 } | |
| 983 } | |
| 984 | |
| 985 | |
| 986 // relock objects for which synchronization was eliminated | |
|
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987 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread) { |
| 0 | 988 for (int i = 0; i < monitors->length(); i++) { |
|
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989 MonitorInfo* mon_info = monitors->at(i); |
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990 if (mon_info->eliminated()) { |
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991 assert(mon_info->owner() != NULL, "reallocation was missed"); |
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992 Handle obj = Handle(mon_info->owner()); |
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993 markOop mark = obj->mark(); |
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994 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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995 // New allocated objects may have the mark set to anonymously biased. |
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996 // Also the deoptimized method may called methods with synchronization |
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997 // where the thread-local object is bias locked to the current thread. |
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998 assert(mark->is_biased_anonymously() || |
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999 mark->biased_locker() == thread, "should be locked to current thread"); |
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1000 // Reset mark word to unbiased prototype. |
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1001 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1002 obj->set_mark(unbiased_prototype); |
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1003 } |
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1004 BasicLock* lock = mon_info->lock(); |
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1005 ObjectSynchronizer::slow_enter(obj, lock, thread); |
| 0 | 1006 } |
|
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1007 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
| 0 | 1008 } |
| 1009 } | |
| 1010 | |
| 1011 | |
| 1012 #ifndef PRODUCT | |
| 1013 // print information about reallocated objects | |
| 1014 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects) { | |
| 1015 fieldDescriptor fd; | |
| 1016 | |
| 1017 for (int i = 0; i < objects->length(); i++) { | |
| 1018 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1019 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 1020 Handle obj = sv->value(); |
| 1021 | |
| 1022 tty->print(" object <" INTPTR_FORMAT "> of type ", sv->value()()); | |
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1023 k->print_value(); |
| 0 | 1024 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
| 1025 tty->cr(); | |
| 1026 | |
| 1027 if (Verbose) { | |
| 1028 k->oop_print_on(obj(), tty); | |
| 1029 } | |
| 1030 } | |
| 1031 } | |
| 1032 #endif | |
|
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1033 #endif // COMPILER2 || GRAAL |
| 0 | 1034 |
| 1035 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk) { | |
|
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1036 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
| 0 | 1037 |
| 1038 #ifndef PRODUCT | |
|
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1039 if (PrintDeoptimizationDetails) { |
| 0 | 1040 ttyLocker ttyl; |
| 1041 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
| 1042 fr.print_on(tty); | |
| 1043 tty->print_cr(" Virtual frames (innermost first):"); | |
| 1044 for (int index = 0; index < chunk->length(); index++) { | |
| 1045 compiledVFrame* vf = chunk->at(index); | |
| 1046 tty->print(" %2d - ", index); | |
| 1047 vf->print_value(); | |
| 1048 int bci = chunk->at(index)->raw_bci(); | |
| 1049 const char* code_name; | |
| 1050 if (bci == SynchronizationEntryBCI) { | |
| 1051 code_name = "sync entry"; | |
| 1052 } else { | |
| 2142 | 1053 Bytecodes::Code code = vf->method()->code_at(bci); |
| 0 | 1054 code_name = Bytecodes::name(code); |
| 1055 } | |
| 1056 tty->print(" - %s", code_name); | |
| 1057 tty->print_cr(" @ bci %d ", bci); | |
| 1058 if (Verbose) { | |
| 1059 vf->print(); | |
| 1060 tty->cr(); | |
| 1061 } | |
| 1062 } | |
| 1063 } | |
| 1064 #endif | |
| 1065 | |
| 1066 // Register map for next frame (used for stack crawl). We capture | |
| 1067 // the state of the deopt'ing frame's caller. Thus if we need to | |
| 1068 // stuff a C2I adapter we can properly fill in the callee-save | |
| 1069 // register locations. | |
| 1070 frame caller = fr.sender(reg_map); | |
| 1071 int frame_size = caller.sp() - fr.sp(); | |
| 1072 | |
| 1073 frame sender = caller; | |
| 1074 | |
| 1075 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
| 1076 // the vframeArray containing the unpacking information is allocated in the C heap. | |
| 1077 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
| 1078 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr); | |
| 1079 | |
| 1080 // Compare the vframeArray to the collected vframes | |
| 1081 assert(array->structural_compare(thread, chunk), "just checking"); | |
| 1082 | |
| 1083 #ifndef PRODUCT | |
|
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1084 if (PrintDeoptimizationDetails) { |
| 0 | 1085 ttyLocker ttyl; |
| 1086 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
| 1087 } | |
| 1088 #endif // PRODUCT | |
| 1089 | |
| 1090 return array; | |
| 1091 } | |
| 1092 | |
| 1093 | |
| 1094 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
| 1095 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
| 1096 for (int i = 0; i < monitors->length(); i++) { | |
| 1097 MonitorInfo* mon_info = monitors->at(i); | |
|
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1098 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
| 0 | 1099 objects_to_revoke->append(Handle(mon_info->owner())); |
| 1100 } | |
| 1101 } | |
| 1102 } | |
| 1103 | |
| 1104 | |
| 1105 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
| 1106 if (!UseBiasedLocking) { | |
| 1107 return; | |
| 1108 } | |
| 1109 | |
| 1110 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 1111 | |
| 1112 // Unfortunately we don't have a RegisterMap available in most of | |
| 1113 // the places we want to call this routine so we need to walk the | |
| 1114 // stack again to update the register map. | |
| 1115 if (map == NULL || !map->update_map()) { | |
| 1116 StackFrameStream sfs(thread, true); | |
| 1117 bool found = false; | |
| 1118 while (!found && !sfs.is_done()) { | |
| 1119 frame* cur = sfs.current(); | |
| 1120 sfs.next(); | |
| 1121 found = cur->id() == fr.id(); | |
| 1122 } | |
| 1123 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
| 1124 map = sfs.register_map(); | |
| 1125 } | |
| 1126 | |
| 1127 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
| 1128 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1129 // Revoke monitors' biases in all scopes | |
| 1130 while (!cvf->is_top()) { | |
| 1131 collect_monitors(cvf, objects_to_revoke); | |
| 1132 cvf = compiledVFrame::cast(cvf->sender()); | |
| 1133 } | |
| 1134 collect_monitors(cvf, objects_to_revoke); | |
| 1135 | |
| 1136 if (SafepointSynchronize::is_at_safepoint()) { | |
| 1137 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
| 1138 } else { | |
| 1139 BiasedLocking::revoke(objects_to_revoke); | |
| 1140 } | |
| 1141 } | |
| 1142 | |
| 1143 | |
| 1144 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
| 1145 if (!UseBiasedLocking) { | |
| 1146 return; | |
| 1147 } | |
| 1148 | |
| 1149 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
| 1150 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 1151 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
| 1152 if (jt->has_last_Java_frame()) { | |
| 1153 StackFrameStream sfs(jt, true); | |
| 1154 while (!sfs.is_done()) { | |
| 1155 frame* cur = sfs.current(); | |
| 1156 if (cb->contains(cur->pc())) { | |
| 1157 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
| 1158 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1159 // Revoke monitors' biases in all scopes | |
| 1160 while (!cvf->is_top()) { | |
| 1161 collect_monitors(cvf, objects_to_revoke); | |
| 1162 cvf = compiledVFrame::cast(cvf->sender()); | |
| 1163 } | |
| 1164 collect_monitors(cvf, objects_to_revoke); | |
| 1165 } | |
| 1166 sfs.next(); | |
| 1167 } | |
| 1168 } | |
| 1169 } | |
| 1170 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
| 1171 } | |
| 1172 | |
| 1173 | |
|
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1174 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
| 0 | 1175 assert(fr.can_be_deoptimized(), "checking frame type"); |
| 1176 | |
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1177 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
| 0 | 1178 |
| 1179 // Patch the nmethod so that when execution returns to it we will | |
| 1180 // deopt the execution state and return to the interpreter. | |
| 1181 fr.deoptimize(thread); | |
| 1182 } | |
| 1183 | |
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1184 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
| 0 | 1185 // Deoptimize only if the frame comes from compile code. |
| 1186 // Do not deoptimize the frame which is already patched | |
| 1187 // during the execution of the loops below. | |
| 1188 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
| 1189 return; | |
| 1190 } | |
| 1191 ResourceMark rm; | |
| 1192 DeoptimizationMarker dm; | |
| 1193 if (UseBiasedLocking) { | |
| 1194 revoke_biases_of_monitors(thread, fr, map); | |
| 1195 } | |
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1196 deoptimize_single_frame(thread, fr, reason); |
| 0 | 1197 |
| 1198 } | |
| 1199 | |
| 1200 | |
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1201 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1202 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
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1203 "can only deoptimize other thread at a safepoint"); |
| 0 | 1204 // Compute frame and register map based on thread and sp. |
| 1205 RegisterMap reg_map(thread, UseBiasedLocking); | |
| 1206 frame fr = thread->last_frame(); | |
| 1207 while (fr.id() != id) { | |
| 1208 fr = fr.sender(®_map); | |
| 1209 } | |
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1210 deoptimize(thread, fr, ®_map, reason); |
| 0 | 1211 } |
| 1212 | |
| 1213 | |
|
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1214 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1215 if (thread == Thread::current()) { |
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1216 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
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1217 } else { |
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1218 VM_DeoptimizeFrame deopt(thread, id, reason); |
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1219 VMThread::execute(&deopt); |
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1220 } |
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parents:
1814
diff
changeset
|
1221 } |
|
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1222 |
|
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1814
diff
changeset
|
1223 |
| 0 | 1224 // JVMTI PopFrame support |
| 1225 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
| 1226 { | |
| 1227 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
| 1228 } | |
| 1229 JRT_END | |
| 1230 | |
| 1231 | |
|
4978
99d3d8a72252
More ifdef GRAAL usage.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
4970
diff
changeset
|
1232 #if defined(COMPILER2) || defined(SHARK) || defined(GRAAL) |
| 0 | 1233 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
| 1234 // in case of an unresolved klass entry, load the class. | |
| 1235 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
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changeset
|
1236 Klass* tk = constant_pool->klass_at(index, CHECK); |
| 0 | 1237 return; |
| 1238 } | |
| 1239 | |
| 1240 if (!constant_pool->tag_at(index).is_symbol()) return; | |
| 1241 | |
|
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1242 Handle class_loader (THREAD, constant_pool->pool_holder()->class_loader()); |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
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|
1243 Symbol* symbol = constant_pool->symbol_at(index); |
| 0 | 1244 |
| 1245 // class name? | |
| 1246 if (symbol->byte_at(0) != '(') { | |
|
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1247 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
| 0 | 1248 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
| 1249 return; | |
| 1250 } | |
| 1251 | |
| 1252 // then it must be a signature! | |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
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diff
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|
1253 ResourceMark rm(THREAD); |
| 0 | 1254 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
| 1255 if (ss.is_object()) { | |
|
2177
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parents:
2142
diff
changeset
|
1256 Symbol* class_name = ss.as_symbol(CHECK); |
|
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6853
diff
changeset
|
1257 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
| 0 | 1258 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
| 1259 } | |
| 1260 } | |
| 1261 } | |
| 1262 | |
| 1263 | |
| 1264 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
| 1265 EXCEPTION_MARK; | |
| 1266 load_class_by_index(constant_pool, index, THREAD); | |
| 1267 if (HAS_PENDING_EXCEPTION) { | |
| 1268 // Exception happened during classloading. We ignore the exception here, since it | |
| 1269 // is going to be rethrown since the current activation is going to be deoptimzied and | |
| 1270 // the interpreter will re-execute the bytecode. | |
| 1271 CLEAR_PENDING_EXCEPTION; | |
| 1272 } | |
| 1273 } | |
| 1274 | |
| 1275 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
| 1276 HandleMark hm; | |
| 1277 | |
| 1278 // uncommon_trap() is called at the beginning of the uncommon trap | |
| 1279 // handler. Note this fact before we start generating temporary frames | |
| 1280 // that can confuse an asynchronous stack walker. This counter is | |
| 1281 // decremented at the end of unpack_frames(). | |
| 1282 thread->inc_in_deopt_handler(); | |
| 1283 | |
| 1284 // We need to update the map if we have biased locking. | |
|
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
|
1285 #ifdef GRAAL |
|
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1286 // (lstadler) Graal might need to get an exception from the stack, which in turn requires the register map to be valid |
|
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1287 RegisterMap reg_map(thread, true); |
|
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1288 #else |
| 0 | 1289 RegisterMap reg_map(thread, UseBiasedLocking); |
|
6428
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1290 #endif |
| 0 | 1291 frame stub_frame = thread->last_frame(); |
| 1292 frame fr = stub_frame.sender(®_map); | |
| 1293 // Make sure the calling nmethod is not getting deoptimized and removed | |
| 1294 // before we are done with it. | |
| 1295 nmethodLocker nl(fr.pc()); | |
| 1296 | |
|
4872
aa3d708d67c4
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|
1297 // Log a message |
|
7193
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1298 Events::log(thread, "Uncommon trap: trap_request=" PTR32_FORMAT " fr.pc=" INTPTR_FORMAT, |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
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diff
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|
1299 trap_request, fr.pc()); |
|
4872
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|
1300 |
| 0 | 1301 { |
| 1302 ResourceMark rm; | |
| 1303 | |
| 1304 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
| 1305 revoke_biases_of_monitors(thread, fr, ®_map); | |
| 1306 | |
| 1307 DeoptReason reason = trap_request_reason(trap_request); | |
| 1308 DeoptAction action = trap_request_action(trap_request); | |
| 1309 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 | |
| 1310 | |
| 1311 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
| 1312 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1313 | |
| 1314 nmethod* nm = cvf->code(); | |
| 1315 | |
| 1316 ScopeDesc* trap_scope = cvf->scope(); | |
|
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1317 |
|
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1318 if (TraceDeoptimization) { |
|
4674
e1c053324210
changed TraceDeoptimization output
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4668
diff
changeset
|
1319 tty->print_cr(" bci=%d pc=%d, relative_pc=%d, method=%s", trap_scope->bci(), fr.pc(), fr.pc() - nm->code_begin(), trap_scope->method()->name()->as_C_string()); |
|
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1320 } |
| 0 | 1321 |
| 1322 methodHandle trap_method = trap_scope->method(); | |
| 1323 int trap_bci = trap_scope->bci(); | |
|
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1324 if (trap_bci == SynchronizationEntryBCI) { |
|
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1325 trap_bci = 0; |
|
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1326 Thread::current()->set_pending_monitorenter(true); |
|
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1327 } |
| 2142 | 1328 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
| 0 | 1329 |
|
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1330 if (trap_scope->rethrow_exception()) { |
|
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
1331 if (PrintDeoptimizationDetails) { |
|
6948
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
1332 tty->print_cr("Exception to be rethrown in the interpreter for method %s::%s at bci %d", trap_method->method_holder()->name()->as_C_string(), trap_method->name()->as_C_string(), trap_bci); |
|
3019
77bb196828cb
Fixed an issue with accessing non-initialized static fields.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3018
diff
changeset
|
1333 } |
|
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1334 GrowableArray<ScopeValue*>* expressions = trap_scope->expressions(); |
|
3167
132aa6f2bbc0
Fixed rethrow exception frame state (again.. and this time added some useful assertions).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3153
diff
changeset
|
1335 guarantee(expressions != NULL, "must have exception to throw"); |
|
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1336 ScopeValue* topOfStack = expressions->top(); |
|
8151
b8f261ba79c6
Minimize diff to plain HotSpot version.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8124
diff
changeset
|
1337 Handle topOfStackObj = StackValue::create_stack_value(&fr, ®_map, topOfStack)->get_obj(); |
|
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1338 THREAD->set_pending_exception(topOfStackObj(), NULL, 0); |
|
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1339 } |
|
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
3017
diff
changeset
|
1340 |
| 0 | 1341 // Record this event in the histogram. |
| 1342 gather_statistics(reason, action, trap_bc); | |
| 1343 | |
| 1344 // Ensure that we can record deopt. history: | |
| 1345 bool create_if_missing = ProfileTraps; | |
| 1346 | |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1347 methodHandle profiled_method; |
|
9571
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1348 #ifdef GRAAL |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1349 if (nm->is_compiled_by_graal()) { |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1350 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
|
1351 } else { |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1352 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
|
1353 } |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1354 #else |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1355 profiled_method = trap_method; |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1356 #endif |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1357 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1358 MethodData* trap_mdo = |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1359 get_method_data(thread, profiled_method, create_if_missing); |
| 0 | 1360 |
|
7193
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1361 // Log a message |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1362 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
|
1363 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
|
1364 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
|
1365 |
| 0 | 1366 // Print a bunch of diagnostics, if requested. |
| 1367 if (TraceDeoptimization || LogCompilation) { | |
| 1368 ResourceMark rm; | |
| 1369 ttyLocker ttyl; | |
| 1370 char buf[100]; | |
| 1371 if (xtty != NULL) { | |
| 1372 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
| 1373 os::current_thread_id(), | |
| 1374 format_trap_request(buf, sizeof(buf), trap_request)); | |
| 1375 nm->log_identity(xtty); | |
| 1376 } | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1377 Symbol* class_name = NULL; |
| 0 | 1378 bool unresolved = false; |
| 1379 if (unloaded_class_index >= 0) { | |
| 1380 constantPoolHandle constants (THREAD, trap_method->constants()); | |
| 1381 if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { | |
|
2177
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coleenp
parents:
2142
diff
changeset
|
1382 class_name = constants->klass_name_at(unloaded_class_index); |
| 0 | 1383 unresolved = true; |
| 1384 if (xtty != NULL) | |
| 1385 xtty->print(" unresolved='1'"); | |
| 1386 } else if (constants->tag_at(unloaded_class_index).is_symbol()) { | |
|
2177
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coleenp
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diff
changeset
|
1387 class_name = constants->symbol_at(unloaded_class_index); |
| 0 | 1388 } |
| 1389 if (xtty != NULL) | |
| 1390 xtty->name(class_name); | |
| 1391 } | |
|
6725
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6266
diff
changeset
|
1392 if (xtty != NULL && trap_mdo != NULL) { |
| 0 | 1393 // Dump the relevant MDO state. |
| 1394 // This is the deopt count for the current reason, any previous | |
| 1395 // reasons or recompiles seen at this point. | |
| 1396 int dcnt = trap_mdo->trap_count(reason); | |
| 1397 if (dcnt != 0) | |
| 1398 xtty->print(" count='%d'", dcnt); | |
| 1399 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
| 1400 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
| 1401 if (dos != 0) { | |
| 1402 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
| 1403 if (trap_state_is_recompiled(dos)) { | |
| 1404 int recnt2 = trap_mdo->overflow_recompile_count(); | |
| 1405 if (recnt2 != 0) | |
| 1406 xtty->print(" recompiles2='%d'", recnt2); | |
| 1407 } | |
| 1408 } | |
| 1409 } | |
| 1410 if (xtty != NULL) { | |
| 1411 xtty->stamp(); | |
| 1412 xtty->end_head(); | |
| 1413 } | |
| 1414 if (TraceDeoptimization) { // make noise on the tty | |
| 1415 tty->print("Uncommon trap occurred in"); | |
| 1416 nm->method()->print_short_name(tty); | |
| 6843 | 1417 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d", |
| 0 | 1418 fr.pc(), |
| 6843 | 1419 os::current_thread_id(), |
| 0 | 1420 trap_reason_name(reason), |
| 1421 trap_action_name(action), | |
| 1422 unloaded_class_index); | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1423 if (class_name != NULL) { |
| 0 | 1424 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
| 1425 class_name->print_symbol_on(tty); | |
| 1426 } | |
| 1427 tty->cr(); | |
| 1428 } | |
| 1429 if (xtty != NULL) { | |
| 1430 // Log the precise location of the trap. | |
| 1431 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
| 1432 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
| 1433 xtty->method(sd->method()); | |
| 1434 xtty->end_elem(); | |
| 1435 if (sd->is_top()) break; | |
| 1436 } | |
| 1437 xtty->tail("uncommon_trap"); | |
| 1438 } | |
| 1439 } | |
| 1440 // (End diagnostic printout.) | |
| 1441 | |
| 1442 // Load class if necessary | |
| 1443 if (unloaded_class_index >= 0) { | |
| 1444 constantPoolHandle constants(THREAD, trap_method->constants()); | |
| 1445 load_class_by_index(constants, unloaded_class_index); | |
| 1446 } | |
| 1447 | |
| 1448 // Flush the nmethod if necessary and desirable. | |
| 1449 // | |
| 1450 // We need to avoid situations where we are re-flushing the nmethod | |
| 1451 // because of a hot deoptimization site. Repeated flushes at the same | |
| 1452 // point need to be detected by the compiler and avoided. If the compiler | |
| 1453 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
| 1454 // module must take measures to avoid an infinite cycle of recompilation | |
| 1455 // and deoptimization. There are several such measures: | |
| 1456 // | |
| 1457 // 1. If a recompilation is ordered a second time at some site X | |
| 1458 // and for the same reason R, the action is adjusted to 'reinterpret', | |
| 1459 // to give the interpreter time to exercise the method more thoroughly. | |
| 1460 // If this happens, the method's overflow_recompile_count is incremented. | |
| 1461 // | |
| 1462 // 2. If the compiler fails to reduce the deoptimization rate, then | |
| 1463 // the method's overflow_recompile_count will begin to exceed the set | |
| 1464 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
| 1465 // is adjusted to 'make_not_compilable', and the method is abandoned | |
| 1466 // to the interpreter. This is a performance hit for hot methods, | |
| 1467 // but is better than a disastrous infinite cycle of recompilations. | |
| 1468 // (Actually, only the method containing the site X is abandoned.) | |
| 1469 // | |
| 1470 // 3. In parallel with the previous measures, if the total number of | |
| 1471 // recompilations of a method exceeds the much larger set limit | |
| 1472 // PerMethodRecompilationCutoff, the method is abandoned. | |
| 1473 // This should only happen if the method is very large and has | |
| 1474 // many "lukewarm" deoptimizations. The code which enforces this | |
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1475 // limit is elsewhere (class nmethod, class Method). |
| 0 | 1476 // |
| 1477 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
| 1478 // to recompile at each bytecode independently of the per-BCI cutoff. | |
| 1479 // | |
| 1480 // The decision to update code is up to the compiler, and is encoded | |
| 1481 // in the Action_xxx code. If the compiler requests Action_none | |
| 1482 // no trap state is changed, no compiled code is changed, and the | |
| 1483 // computation suffers along in the interpreter. | |
| 1484 // | |
| 1485 // The other action codes specify various tactics for decompilation | |
| 1486 // and recompilation. Action_maybe_recompile is the loosest, and | |
| 1487 // allows the compiled code to stay around until enough traps are seen, | |
| 1488 // and until the compiler gets around to recompiling the trapping method. | |
| 1489 // | |
| 1490 // The other actions cause immediate removal of the present code. | |
| 1491 | |
| 1492 bool update_trap_state = true; | |
| 1493 bool make_not_entrant = false; | |
| 1494 bool make_not_compilable = false; | |
| 1783 | 1495 bool reprofile = false; |
| 0 | 1496 switch (action) { |
| 1497 case Action_none: | |
| 1498 // Keep the old code. | |
| 1499 update_trap_state = false; | |
| 1500 break; | |
| 1501 case Action_maybe_recompile: | |
| 1502 // Do not need to invalidate the present code, but we can | |
| 1503 // initiate another | |
| 1504 // Start compiler without (necessarily) invalidating the nmethod. | |
| 1505 // The system will tolerate the old code, but new code should be | |
| 1506 // generated when possible. | |
| 1507 break; | |
| 1508 case Action_reinterpret: | |
| 1509 // Go back into the interpreter for a while, and then consider | |
| 1510 // recompiling form scratch. | |
| 1511 make_not_entrant = true; | |
| 1512 // Reset invocation counter for outer most method. | |
| 1513 // This will allow the interpreter to exercise the bytecodes | |
| 1514 // for a while before recompiling. | |
| 1515 // By contrast, Action_make_not_entrant is immediate. | |
| 1516 // | |
| 1517 // Note that the compiler will track null_check, null_assert, | |
| 1518 // range_check, and class_check events and log them as if they | |
| 1519 // had been traps taken from compiled code. This will update | |
| 1520 // the MDO trap history so that the next compilation will | |
| 1521 // properly detect hot trap sites. | |
| 1783 | 1522 reprofile = true; |
| 0 | 1523 break; |
| 1524 case Action_make_not_entrant: | |
| 1525 // Request immediate recompilation, and get rid of the old code. | |
| 1526 // Make them not entrant, so next time they are called they get | |
| 1527 // recompiled. Unloaded classes are loaded now so recompile before next | |
| 1528 // time they are called. Same for uninitialized. The interpreter will | |
| 1529 // link the missing class, if any. | |
| 1530 make_not_entrant = true; | |
| 1531 break; | |
| 1532 case Action_make_not_compilable: | |
| 1533 // Give up on compiling this method at all. | |
| 1534 make_not_entrant = true; | |
| 1535 make_not_compilable = true; | |
| 1536 break; | |
| 1537 default: | |
| 1538 ShouldNotReachHere(); | |
| 1539 } | |
| 1540 | |
| 1541 // Setting +ProfileTraps fixes the following, on all platforms: | |
| 1542 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
| 1543 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
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1544 // recompile relies on a MethodData* to record heroic opt failures. |
| 0 | 1545 |
| 1546 // Whether the interpreter is producing MDO data or not, we also need | |
| 1547 // to use the MDO to detect hot deoptimization points and control | |
| 1548 // aggressive optimization. | |
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1549 bool inc_recompile_count = false; |
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1550 ProfileData* pdata = NULL; |
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1551 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
| 0 | 1552 uint this_trap_count = 0; |
| 1553 bool maybe_prior_trap = false; | |
| 1554 bool maybe_prior_recompile = false; | |
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1555 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
| 0 | 1556 //outputs: |
| 1557 this_trap_count, | |
| 1558 maybe_prior_trap, | |
| 1559 maybe_prior_recompile); | |
| 1560 // Because the interpreter also counts null, div0, range, and class | |
| 1561 // checks, these traps from compiled code are double-counted. | |
| 1562 // This is harmless; it just means that the PerXTrapLimit values | |
| 1563 // are in effect a little smaller than they look. | |
| 1564 | |
| 1565 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
| 1566 if (per_bc_reason != Reason_none) { | |
| 1567 // Now take action based on the partially known per-BCI history. | |
| 1568 if (maybe_prior_trap | |
| 1569 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
| 1570 // If there are too many traps at this BCI, force a recompile. | |
| 1571 // This will allow the compiler to see the limit overflow, and | |
| 1572 // take corrective action, if possible. The compiler generally | |
| 1573 // does not use the exact PerBytecodeTrapLimit value, but instead | |
| 1574 // changes its tactics if it sees any traps at all. This provides | |
| 1575 // a little hysteresis, delaying a recompile until a trap happens | |
| 1576 // several times. | |
| 1577 // | |
| 1578 // Actually, since there is only one bit of counter per BCI, | |
| 1579 // the possible per-BCI counts are {0,1,(per-method count)}. | |
| 1580 // This produces accurate results if in fact there is only | |
| 1581 // one hot trap site, but begins to get fuzzy if there are | |
| 1582 // many sites. For example, if there are ten sites each | |
| 1583 // trapping two or more times, they each get the blame for | |
| 1584 // all of their traps. | |
| 1585 make_not_entrant = true; | |
| 1586 } | |
| 1587 | |
| 1588 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
| 1589 if (make_not_entrant && maybe_prior_recompile) { | |
| 1590 // More than one recompile at this point. | |
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1591 inc_recompile_count = maybe_prior_trap; |
| 0 | 1592 } |
| 1593 } else { | |
| 1594 // For reasons which are not recorded per-bytecode, we simply | |
| 1595 // force recompiles unconditionally. | |
| 1596 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
| 1597 make_not_entrant = true; | |
| 1598 } | |
| 1599 | |
| 1600 // Go back to the compiler if there are too many traps in this method. | |
| 1601 if (this_trap_count >= (uint)PerMethodTrapLimit) { | |
| 1602 // If there are too many traps in this method, force a recompile. | |
| 1603 // This will allow the compiler to see the limit overflow, and | |
| 1604 // take corrective action, if possible. | |
| 1605 // (This condition is an unlikely backstop only, because the | |
| 1606 // PerBytecodeTrapLimit is more likely to take effect first, | |
| 1607 // if it is applicable.) | |
| 1608 make_not_entrant = true; | |
| 1609 } | |
| 1610 | |
| 1611 // Here's more hysteresis: If there has been a recompile at | |
| 1612 // this trap point already, run the method in the interpreter | |
| 1613 // for a while to exercise it more thoroughly. | |
| 1614 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
| 1783 | 1615 reprofile = true; |
| 0 | 1616 } |
| 1617 | |
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1618 } |
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1619 |
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1620 // Take requested actions on the method: |
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1621 |
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1622 // Recompile |
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1623 if (make_not_entrant) { |
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1624 if (!nm->make_not_entrant()) { |
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1625 return; // the call did not change nmethod's state |
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1626 } |
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1627 |
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1628 if (pdata != NULL) { |
| 0 | 1629 // Record the recompilation event, if any. |
| 1630 int tstate0 = pdata->trap_state(); | |
| 1631 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
| 1632 if (tstate1 != tstate0) | |
| 1633 pdata->set_trap_state(tstate1); | |
| 1634 } | |
| 1635 } | |
| 1636 | |
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1637 if (inc_recompile_count) { |
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1638 trap_mdo->inc_overflow_recompile_count(); |
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1639 if ((uint)trap_mdo->overflow_recompile_count() > |
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1640 (uint)PerBytecodeRecompilationCutoff) { |
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1641 // Give up on the method containing the bad BCI. |
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1642 if (trap_method() == nm->method()) { |
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1643 make_not_compilable = true; |
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1644 } else { |
| 7998 | 1645 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
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1646 // But give grace to the enclosing nm->method(). |
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1647 } |
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1648 } |
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1649 } |
| 0 | 1650 |
| 1783 | 1651 // Reprofile |
| 1652 if (reprofile) { | |
| 1653 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
| 0 | 1654 } |
| 1655 | |
| 1656 // Give up compiling | |
| 1783 | 1657 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
| 0 | 1658 assert(make_not_entrant, "consistent"); |
| 1783 | 1659 nm->method()->set_not_compilable(CompLevel_full_optimization); |
| 0 | 1660 } |
| 1661 | |
| 1662 } // Free marked resources | |
| 1663 | |
| 1664 } | |
| 1665 JRT_END | |
| 1666 | |
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1667 MethodData* |
| 0 | 1668 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
| 1669 bool create_if_missing) { | |
| 1670 Thread* THREAD = thread; | |
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1671 MethodData* mdo = m()->method_data(); |
| 0 | 1672 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
| 1673 // Build an MDO. Ignore errors like OutOfMemory; | |
| 1674 // that simply means we won't have an MDO to update. | |
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1675 Method::build_interpreter_method_data(m, THREAD); |
| 0 | 1676 if (HAS_PENDING_EXCEPTION) { |
| 1677 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
| 1678 CLEAR_PENDING_EXCEPTION; | |
| 1679 } | |
| 1680 mdo = m()->method_data(); | |
| 1681 } | |
| 1682 return mdo; | |
| 1683 } | |
| 1684 | |
| 1685 ProfileData* | |
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1686 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
| 0 | 1687 int trap_bci, |
| 1688 Deoptimization::DeoptReason reason, | |
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1689 bool update_total_trap_count, |
| 0 | 1690 //outputs: |
| 1691 uint& ret_this_trap_count, | |
| 1692 bool& ret_maybe_prior_trap, | |
| 1693 bool& ret_maybe_prior_recompile) { | |
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1694 bool maybe_prior_trap = false; |
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1695 bool maybe_prior_recompile = false; |
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1696 uint this_trap_count = 0; |
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1697 if (update_total_trap_count) { |
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1698 uint prior_trap_count = trap_mdo->trap_count(reason); |
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1699 this_trap_count = trap_mdo->inc_trap_count(reason); |
| 0 | 1700 |
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1701 // If the runtime cannot find a place to store trap history, |
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1702 // it is estimated based on the general condition of the method. |
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1703 // If the method has ever been recompiled, or has ever incurred |
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1704 // a trap with the present reason , then this BCI is assumed |
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1705 // (pessimistically) to be the culprit. |
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1706 maybe_prior_trap = (prior_trap_count != 0); |
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1707 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1708 } |
| 0 | 1709 |
| 1710 // For reasons which are recorded per bytecode, we check per-BCI data. | |
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1711 ProfileData* pdata = NULL; |
| 0 | 1712 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); |
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1713 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
| 0 | 1714 if (per_bc_reason != Reason_none) { |
| 1715 // Find the profile data for this BCI. If there isn't one, | |
| 1716 // try to allocate one from the MDO's set of spares. | |
| 1717 // This will let us detect a repeated trap at this point. | |
| 1718 pdata = trap_mdo->allocate_bci_to_data(trap_bci); | |
| 1719 | |
| 1720 if (pdata != NULL) { | |
| 1721 // Query the trap state of this profile datum. | |
| 1722 int tstate0 = pdata->trap_state(); | |
| 1723 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
| 1724 maybe_prior_trap = false; | |
| 1725 if (!trap_state_is_recompiled(tstate0)) | |
| 1726 maybe_prior_recompile = false; | |
| 1727 | |
| 1728 // Update the trap state of this profile datum. | |
| 1729 int tstate1 = tstate0; | |
| 1730 // Record the reason. | |
| 1731 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
| 1732 // Store the updated state on the MDO, for next time. | |
| 1733 if (tstate1 != tstate0) | |
| 1734 pdata->set_trap_state(tstate1); | |
| 1735 } else { | |
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1736 if (LogCompilation && xtty != NULL) { |
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1737 ttyLocker ttyl; |
| 0 | 1738 // Missing MDP? Leave a small complaint in the log. |
| 1739 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1740 } |
| 0 | 1741 } |
| 1742 } | |
| 1743 | |
| 1744 // Return results: | |
| 1745 ret_this_trap_count = this_trap_count; | |
| 1746 ret_maybe_prior_trap = maybe_prior_trap; | |
| 1747 ret_maybe_prior_recompile = maybe_prior_recompile; | |
| 1748 return pdata; | |
| 1749 } | |
| 1750 | |
| 1751 void | |
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1752 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 0 | 1753 ResourceMark rm; |
| 1754 // Ignored outputs: | |
| 1755 uint ignore_this_trap_count; | |
| 1756 bool ignore_maybe_prior_trap; | |
| 1757 bool ignore_maybe_prior_recompile; | |
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1758 // Graal uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
| 5130 | 1759 bool update_total_counts = GRAAL_ONLY(false) NOT_GRAAL(true); |
| 0 | 1760 query_update_method_data(trap_mdo, trap_bci, |
| 1761 (DeoptReason)reason, | |
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1762 update_total_counts, |
| 0 | 1763 ignore_this_trap_count, |
| 1764 ignore_maybe_prior_trap, | |
| 1765 ignore_maybe_prior_recompile); | |
| 1766 } | |
| 1767 | |
| 1768 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) { | |
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1769 if (TraceDeoptimization) { |
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1770 tty->print("Uncommon trap "); |
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1771 } |
| 0 | 1772 // Still in Java no safepoints |
| 1773 { | |
| 1774 // This enters VM and may safepoint | |
| 1775 uncommon_trap_inner(thread, trap_request); | |
| 1776 } | |
| 1777 return fetch_unroll_info_helper(thread); | |
| 1778 } | |
| 1779 | |
| 1780 // Local derived constants. | |
| 1781 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
| 1782 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
| 1783 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
| 1784 | |
| 1785 //---------------------------trap_state_reason--------------------------------- | |
| 1786 Deoptimization::DeoptReason | |
| 1787 Deoptimization::trap_state_reason(int trap_state) { | |
| 1788 // This assert provides the link between the width of DataLayout::trap_bits | |
| 1789 // and the encoding of "recorded" reasons. It ensures there are enough | |
| 1790 // bits to store all needed reasons in the per-BCI MDO profile. | |
| 1791 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
| 1792 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 1793 trap_state -= recompile_bit; | |
| 1794 if (trap_state == DS_REASON_MASK) { | |
| 1795 return Reason_many; | |
| 1796 } else { | |
| 1797 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
| 1798 return (DeoptReason)trap_state; | |
| 1799 } | |
| 1800 } | |
| 1801 //-------------------------trap_state_has_reason------------------------------- | |
| 1802 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
| 1803 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
| 1804 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
| 1805 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 1806 trap_state -= recompile_bit; | |
| 1807 if (trap_state == DS_REASON_MASK) { | |
| 1808 return -1; // true, unspecifically (bottom of state lattice) | |
| 1809 } else if (trap_state == reason) { | |
| 1810 return 1; // true, definitely | |
| 1811 } else if (trap_state == 0) { | |
| 1812 return 0; // false, definitely (top of state lattice) | |
| 1813 } else { | |
| 1814 return 0; // false, definitely | |
| 1815 } | |
| 1816 } | |
| 1817 //-------------------------trap_state_add_reason------------------------------- | |
| 1818 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
| 1819 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
| 1820 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 1821 trap_state -= recompile_bit; | |
| 1822 if (trap_state == DS_REASON_MASK) { | |
| 1823 return trap_state + recompile_bit; // already at state lattice bottom | |
| 1824 } else if (trap_state == reason) { | |
| 1825 return trap_state + recompile_bit; // the condition is already true | |
| 1826 } else if (trap_state == 0) { | |
| 1827 return reason + recompile_bit; // no condition has yet been true | |
| 1828 } else { | |
| 1829 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
| 1830 } | |
| 1831 } | |
| 1832 //-----------------------trap_state_is_recompiled------------------------------ | |
| 1833 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
| 1834 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
| 1835 } | |
| 1836 //-----------------------trap_state_set_recompiled----------------------------- | |
| 1837 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
| 1838 if (z) return trap_state | DS_RECOMPILE_BIT; | |
| 1839 else return trap_state & ~DS_RECOMPILE_BIT; | |
| 1840 } | |
| 1841 //---------------------------format_trap_state--------------------------------- | |
| 1842 // This is used for debugging and diagnostics, including hotspot.log output. | |
| 1843 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
| 1844 int trap_state) { | |
| 1845 DeoptReason reason = trap_state_reason(trap_state); | |
| 1846 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
| 1847 // Re-encode the state from its decoded components. | |
| 1848 int decoded_state = 0; | |
| 1849 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
| 1850 decoded_state = trap_state_add_reason(decoded_state, reason); | |
| 1851 if (recomp_flag) | |
| 1852 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
| 1853 // If the state re-encodes properly, format it symbolically. | |
| 1854 // Because this routine is used for debugging and diagnostics, | |
| 1855 // be robust even if the state is a strange value. | |
| 1856 size_t len; | |
| 1857 if (decoded_state != trap_state) { | |
| 1858 // Random buggy state that doesn't decode?? | |
| 1859 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
| 1860 } else { | |
| 1861 len = jio_snprintf(buf, buflen, "%s%s", | |
| 1862 trap_reason_name(reason), | |
| 1863 recomp_flag ? " recompiled" : ""); | |
| 1864 } | |
| 1865 if (len >= buflen) | |
| 1866 buf[buflen-1] = '\0'; | |
| 1867 return buf; | |
| 1868 } | |
| 1869 | |
| 1870 | |
| 1871 //--------------------------------statics-------------------------------------- | |
| 1872 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
| 1873 = Deoptimization::Action_reinterpret; | |
| 1874 const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = { | |
| 1875 // Note: Keep this in sync. with enum DeoptReason. | |
| 1876 "none", | |
| 1877 "null_check", | |
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1878 "null_assert" GRAAL_ONLY("|unreached0"), |
| 0 | 1879 "range_check", |
| 1880 "class_check", | |
| 1881 "array_check", | |
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1882 "intrinsic" GRAAL_ONLY("|type_checked_inlining"), |
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1883 "bimorphic" GRAAL_ONLY("|optimized_type_check"), |
| 0 | 1884 "unloaded", |
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1885 "uninitialized" GRAAL_ONLY("|unresolved"), |
| 0 | 1886 "unreached", |
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1887 "unhandled" GRAAL_ONLY("|not_compiled_exception_handler"), |
| 0 | 1888 "constraint", |
| 1889 "div0_check", | |
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1890 "age" GRAAL_ONLY("|jsr_mismatch"), |
| 3345 | 1891 "predicate", |
| 1892 "loop_limit_check" | |
| 0 | 1893 }; |
| 1894 const char* Deoptimization::_trap_action_name[Action_LIMIT] = { | |
| 1895 // Note: Keep this in sync. with enum DeoptAction. | |
| 1896 "none", | |
| 1897 "maybe_recompile", | |
| 1898 "reinterpret", | |
| 1899 "make_not_entrant", | |
| 1900 "make_not_compilable" | |
| 1901 }; | |
| 1902 | |
| 1903 const char* Deoptimization::trap_reason_name(int reason) { | |
| 1904 if (reason == Reason_many) return "many"; | |
| 1905 if ((uint)reason < Reason_LIMIT) | |
| 1906 return _trap_reason_name[reason]; | |
| 1907 static char buf[20]; | |
| 1908 sprintf(buf, "reason%d", reason); | |
| 1909 return buf; | |
| 1910 } | |
| 1911 const char* Deoptimization::trap_action_name(int action) { | |
| 1912 if ((uint)action < Action_LIMIT) | |
| 1913 return _trap_action_name[action]; | |
| 1914 static char buf[20]; | |
| 1915 sprintf(buf, "action%d", action); | |
| 1916 return buf; | |
| 1917 } | |
| 1918 | |
| 1919 // This is used for debugging and diagnostics, including hotspot.log output. | |
| 1920 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, | |
| 1921 int trap_request) { | |
| 1922 jint unloaded_class_index = trap_request_index(trap_request); | |
| 1923 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
| 1924 const char* action = trap_action_name(trap_request_action(trap_request)); | |
| 1925 size_t len; | |
| 1926 if (unloaded_class_index < 0) { | |
| 1927 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'", | |
| 1928 reason, action); | |
| 1929 } else { | |
| 1930 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'", | |
| 1931 reason, action, unloaded_class_index); | |
| 1932 } | |
| 1933 if (len >= buflen) | |
| 1934 buf[buflen-1] = '\0'; | |
| 1935 return buf; | |
| 1936 } | |
| 1937 | |
| 1938 juint Deoptimization::_deoptimization_hist | |
| 1939 [Deoptimization::Reason_LIMIT] | |
| 1940 [1 + Deoptimization::Action_LIMIT] | |
| 1941 [Deoptimization::BC_CASE_LIMIT] | |
| 1942 = {0}; | |
| 1943 | |
| 1944 enum { | |
| 1945 LSB_BITS = 8, | |
| 1946 LSB_MASK = right_n_bits(LSB_BITS) | |
| 1947 }; | |
| 1948 | |
| 1949 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
| 1950 Bytecodes::Code bc) { | |
| 1951 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
| 1952 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
| 1953 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
| 1954 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
| 1955 juint* cases = _deoptimization_hist[reason][1+action]; | |
| 1956 juint* bc_counter_addr = NULL; | |
| 1957 juint bc_counter = 0; | |
| 1958 // Look for an unused counter, or an exact match to this BC. | |
| 1959 if (bc != Bytecodes::_illegal) { | |
| 1960 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
| 1961 juint* counter_addr = &cases[bc_case]; | |
| 1962 juint counter = *counter_addr; | |
| 1963 if ((counter == 0 && bc_counter_addr == NULL) | |
| 1964 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
| 1965 // this counter is either free or is already devoted to this BC | |
| 1966 bc_counter_addr = counter_addr; | |
| 1967 bc_counter = counter | bc; | |
| 1968 } | |
| 1969 } | |
| 1970 } | |
| 1971 if (bc_counter_addr == NULL) { | |
| 1972 // Overflow, or no given bytecode. | |
| 1973 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
| 1974 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
| 1975 } | |
| 1976 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
| 1977 } | |
| 1978 | |
| 1979 jint Deoptimization::total_deoptimization_count() { | |
| 1980 return _deoptimization_hist[Reason_none][0][0]; | |
| 1981 } | |
| 1982 | |
| 1983 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
| 1984 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
| 1985 return _deoptimization_hist[reason][0][0]; | |
| 1986 } | |
| 1987 | |
| 1988 void Deoptimization::print_statistics() { | |
| 1989 juint total = total_deoptimization_count(); | |
| 1990 juint account = total; | |
| 1991 if (total != 0) { | |
| 1992 ttyLocker ttyl; | |
| 1993 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
| 1994 tty->print_cr("Deoptimization traps recorded:"); | |
| 1995 #define PRINT_STAT_LINE(name, r) \ | |
| 1996 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
| 1997 PRINT_STAT_LINE("total", total); | |
| 1998 // For each non-zero entry in the histogram, print the reason, | |
| 1999 // the action, and (if specifically known) the type of bytecode. | |
| 2000 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
| 2001 for (int action = 0; action < Action_LIMIT; action++) { | |
| 2002 juint* cases = _deoptimization_hist[reason][1+action]; | |
| 2003 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
| 2004 juint counter = cases[bc_case]; | |
| 2005 if (counter != 0) { | |
| 2006 char name[1*K]; | |
| 2007 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
| 2008 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
| 2009 bc = Bytecodes::_illegal; | |
| 2010 sprintf(name, "%s/%s/%s", | |
| 2011 trap_reason_name(reason), | |
| 2012 trap_action_name(action), | |
| 2013 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
| 2014 juint r = counter >> LSB_BITS; | |
| 2015 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
| 2016 account -= r; | |
| 2017 } | |
| 2018 } | |
| 2019 } | |
| 2020 } | |
| 2021 if (account != 0) { | |
| 2022 PRINT_STAT_LINE("unaccounted", account); | |
| 2023 } | |
| 2024 #undef PRINT_STAT_LINE | |
| 2025 if (xtty != NULL) xtty->tail("statistics"); | |
| 2026 } | |
| 2027 } | |
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2028 #else // COMPILER2 || SHARK || GRAAL |
| 0 | 2029 |
| 2030 | |
| 2031 // Stubs for C1 only system. | |
| 2032 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
| 2033 return false; | |
| 2034 } | |
| 2035 | |
| 2036 const char* Deoptimization::trap_reason_name(int reason) { | |
| 2037 return "unknown"; | |
| 2038 } | |
| 2039 | |
| 2040 void Deoptimization::print_statistics() { | |
| 2041 // no output | |
| 2042 } | |
| 2043 | |
| 2044 void | |
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2045 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 0 | 2046 // no udpate |
| 2047 } | |
| 2048 | |
| 2049 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
| 2050 return 0; | |
| 2051 } | |
| 2052 | |
| 2053 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
| 2054 Bytecodes::Code bc) { | |
| 2055 // no update | |
| 2056 } | |
| 2057 | |
| 2058 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
| 2059 int trap_state) { | |
| 2060 jio_snprintf(buf, buflen, "#%d", trap_state); | |
| 2061 return buf; | |
| 2062 } | |
| 2063 | |
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2064 #endif // COMPILER2 || SHARK || GRAAL |