Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/deoptimization.cpp @ 7212:291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Fri, 14 Dec 2012 14:35:13 +0100 |
| parents | 5d0bb7d52783 d2f8c38e543d |
| children | 310a68c63b69 |
| 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 PcDesc* pc_desc = ((nmethod*) deoptee.cb())->pc_desc_at(deoptee.pc()); |
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213 if (pc_desc != NULL && pc_desc->leaf_graph_id() != -1) { |
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214 GraalCompiler* compiler = (GraalCompiler*) ((nmethod*) deoptee.cb())->compiler(); |
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215 if (PrintDeoptimizationDetails) { |
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216 tty->print_cr("leaf graph id: %d", pc_desc->leaf_graph_id()); |
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217 } |
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218 compiler->deopt_leaf_graph(pc_desc->leaf_graph_id()); |
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219 } |
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220 #endif |
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221 |
| 0 | 222 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); |
| 223 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
| 224 while (!vf->is_top()) { | |
| 225 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
| 226 chunk->push(compiledVFrame::cast(vf)); | |
| 227 vf = vf->sender(); | |
| 228 } | |
| 229 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
| 230 chunk->push(compiledVFrame::cast(vf)); | |
| 231 | |
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232 #if defined(COMPILER2) || defined(GRAAL) |
| 0 | 233 // Reallocate the non-escaping objects and restore their fields. Then |
| 234 // relock objects if synchronization on them was eliminated. | |
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235 #ifdef COMPILER2 |
| 4777 | 236 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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237 if (EliminateAllocations) { |
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238 #endif // COMPILER2 |
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239 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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240 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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241 |
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242 // The flag return_oop() indicates call sites which return oop |
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243 // in compiled code. Such sites include java method calls, |
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244 // runtime calls (for example, used to allocate new objects/arrays |
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245 // on slow code path) and any other calls generated in compiled code. |
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246 // It is not guaranteed that we can get such information here only |
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247 // by analyzing bytecode in deoptimized frames. This is why this flag |
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248 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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249 bool save_oop_result = chunk->at(0)->scope()->return_oop(); |
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250 Handle return_value; |
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251 if (save_oop_result) { |
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252 // Reallocation may trigger GC. If deoptimization happened on return from |
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253 // call which returns oop we need to save it since it is not in oopmap. |
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254 oop result = deoptee.saved_oop_result(&map); |
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255 assert(result == NULL || result->is_oop(), "must be oop"); |
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256 return_value = Handle(thread, result); |
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257 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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258 if (TraceDeoptimization) { |
| 6843 | 259 ttyLocker ttyl; |
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260 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, result, thread); |
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261 } |
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262 } |
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263 bool reallocated = false; |
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264 if (objects != NULL) { |
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265 JRT_BLOCK |
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266 reallocated = realloc_objects(thread, &deoptee, objects, THREAD); |
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267 JRT_END |
| 0 | 268 } |
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269 if (reallocated) { |
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270 reassign_fields(&deoptee, &map, objects); |
| 0 | 271 #ifndef PRODUCT |
| 272 if (TraceDeoptimization) { | |
| 273 ttyLocker ttyl; | |
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274 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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275 print_objects(objects); |
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276 } |
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277 #endif |
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278 } |
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279 if (save_oop_result) { |
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280 // Restore result. |
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281 deoptee.set_saved_oop_result(&map, return_value()); |
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282 } |
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283 #ifdef COMPILER2 |
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284 } |
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285 if (EliminateLocks) { |
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286 #endif // COMPILER2 |
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287 #ifndef PRODUCT |
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288 bool first = true; |
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289 #endif |
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290 for (int i = 0; i < chunk->length(); i++) { |
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291 compiledVFrame* cvf = chunk->at(i); |
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292 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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293 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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294 if (monitors->is_nonempty()) { |
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295 relock_objects(monitors, thread); |
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296 #ifndef PRODUCT |
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297 if (PrintDeoptimizationDetails) { |
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298 ttyLocker ttyl; |
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299 for (int j = 0; j < monitors->length(); j++) { |
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300 MonitorInfo* mi = monitors->at(j); |
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301 if (mi->eliminated()) { |
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302 if (first) { |
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303 first = false; |
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304 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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305 } |
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306 tty->print_cr(" object <" INTPTR_FORMAT "> locked", mi->owner()); |
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307 } |
| 0 | 308 } |
| 309 } | |
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310 #endif // !PRODUCT |
| 0 | 311 } |
| 312 } | |
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313 #ifdef COMPILER2 |
| 0 | 314 } |
| 315 } | |
| 316 #endif // COMPILER2 | |
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317 #endif // COMPILER2 || GRAAL |
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318 |
| 0 | 319 // Ensure that no safepoint is taken after pointers have been stored |
| 320 // in fields of rematerialized objects. If a safepoint occurs from here on | |
| 321 // out the java state residing in the vframeArray will be missed. | |
| 322 No_Safepoint_Verifier no_safepoint; | |
| 323 | |
| 324 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk); | |
| 325 | |
| 326 assert(thread->vframe_array_head() == NULL, "Pending deopt!");; | |
| 327 thread->set_vframe_array_head(array); | |
| 328 | |
| 329 // Now that the vframeArray has been created if we have any deferred local writes | |
| 330 // added by jvmti then we can free up that structure as the data is now in the | |
| 331 // vframeArray | |
| 332 | |
| 333 if (thread->deferred_locals() != NULL) { | |
| 334 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
| 335 int i = 0; | |
| 336 do { | |
| 337 // Because of inlining we could have multiple vframes for a single frame | |
| 338 // and several of the vframes could have deferred writes. Find them all. | |
| 339 if (list->at(i)->id() == array->original().id()) { | |
| 340 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
| 341 list->remove_at(i); | |
| 342 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
| 343 delete dlv; | |
| 344 } else { | |
| 345 i++; | |
| 346 } | |
| 347 } while ( i < list->length() ); | |
| 348 if (list->length() == 0) { | |
| 349 thread->set_deferred_locals(NULL); | |
| 350 // free the list and elements back to C heap. | |
| 351 delete list; | |
| 352 } | |
| 353 | |
| 354 } | |
| 355 | |
| 1692 | 356 #ifndef SHARK |
| 0 | 357 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
| 358 CodeBlob* cb = stub_frame.cb(); | |
| 359 // Verify we have the right vframeArray | |
| 360 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
| 361 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
| 362 | |
| 1204 | 363 // If the deopt call site is a MethodHandle invoke call site we have |
| 364 // to adjust the unpack_sp. | |
| 365 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
| 366 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
| 367 unpack_sp = deoptee.unextended_sp(); | |
| 368 | |
| 0 | 369 #ifdef ASSERT |
| 370 assert(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub(), "just checking"); | |
| 371 #endif | |
| 1692 | 372 #else |
| 373 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
| 374 #endif // !SHARK | |
| 375 | |
| 0 | 376 // This is a guarantee instead of an assert because if vframe doesn't match |
| 377 // we will unpack the wrong deoptimized frame and wind up in strange places | |
| 378 // where it will be very difficult to figure out what went wrong. Better | |
| 379 // to die an early death here than some very obscure death later when the | |
| 380 // trail is cold. | |
| 381 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
| 382 // in that it will fail to detect a problem when there is one. This needs | |
| 383 // more work in tiger timeframe. | |
| 384 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
| 385 | |
| 386 int number_of_frames = array->frames(); | |
| 387 | |
| 388 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
| 389 // virtual activation, which is the reverse of the elements in the vframes array. | |
| 6197 | 390 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
| 0 | 391 // +1 because we always have an interpreter return address for the final slot. |
| 6197 | 392 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
| 0 | 393 int popframe_extra_args = 0; |
| 394 // Create an interpreter return address for the stub to use as its return | |
| 395 // address so the skeletal frames are perfectly walkable | |
| 396 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
| 397 | |
| 398 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
| 399 // activation be put back on the expression stack of the caller for reexecution | |
| 400 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
| 401 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
| 402 } | |
| 403 | |
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404 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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405 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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406 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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407 // |
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408 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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409 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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410 |
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411 // It's possible that the number of paramters at the call site is |
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412 // different than number of arguments in the callee when method |
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413 // handles are used. If the caller is interpreted get the real |
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414 // value so that the proper amount of space can be added to it's |
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415 // frame. |
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416 bool caller_was_method_handle = false; |
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417 if (deopt_sender.is_interpreted_frame()) { |
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418 methodHandle method = deopt_sender.interpreter_frame_method(); |
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419 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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420 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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421 // Method handle invokes may involve fairly arbitrary chains of |
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422 // calls so it's impossible to know how much actual space the |
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423 // caller has for locals. |
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424 caller_was_method_handle = true; |
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425 } |
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426 } |
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427 |
| 0 | 428 // |
| 429 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
| 430 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
| 431 // frame_sizes/frame_pcs[n] youngest frame (int) | |
| 432 // | |
| 433 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
| 434 // owns the space for the return address to it's caller). Confusing ain't it. | |
| 435 // | |
| 436 // The vframe array can address vframes with indices running from | |
| 437 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
| 438 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
| 439 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
| 440 // so things look a little strange in this loop. | |
| 441 // | |
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442 int callee_parameters = 0; |
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443 int callee_locals = 0; |
| 0 | 444 for (int index = 0; index < array->frames(); index++ ) { |
| 445 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
| 446 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
| 447 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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448 int caller_parms = callee_parameters; |
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449 if ((index == array->frames() - 1) && caller_was_method_handle) { |
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450 caller_parms = 0; |
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451 } |
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452 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(caller_parms, |
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453 callee_parameters, |
| 0 | 454 callee_locals, |
| 455 index == 0, | |
| 456 popframe_extra_args); | |
| 457 // This pc doesn't have to be perfect just good enough to identify the frame | |
| 458 // as interpreted so the skeleton frame will be walkable | |
| 459 // The correct pc will be set when the skeleton frame is completely filled out | |
| 460 // The final pc we store in the loop is wrong and will be overwritten below | |
| 461 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
| 462 | |
| 463 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
| 464 callee_locals = array->element(index)->method()->max_locals(); | |
| 465 popframe_extra_args = 0; | |
| 466 } | |
| 467 | |
| 468 // Compute whether the root vframe returns a float or double value. | |
| 469 BasicType return_type; | |
| 470 { | |
| 471 HandleMark hm; | |
| 472 methodHandle method(thread, array->element(0)->method()); | |
| 2142 | 473 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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474 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
| 0 | 475 } |
| 476 | |
| 477 // Compute information for handling adapters and adjusting the frame size of the caller. | |
| 478 int caller_adjustment = 0; | |
| 479 | |
| 480 // Compute the amount the oldest interpreter frame will have to adjust | |
| 481 // its caller's stack by. If the caller is a compiled frame then | |
| 482 // we pretend that the callee has no parameters so that the | |
| 483 // extension counts for the full amount of locals and not just | |
| 484 // locals-parms. This is because without a c2i adapter the parm | |
| 485 // area as created by the compiled frame will not be usable by | |
| 486 // the interpreter. (Depending on the calling convention there | |
| 487 // may not even be enough space). | |
| 488 | |
| 489 // QQQ I'd rather see this pushed down into last_frame_adjust | |
| 490 // and have it take the sender (aka caller). | |
| 491 | |
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492 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
| 0 | 493 caller_adjustment = last_frame_adjust(0, callee_locals); |
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494 } else if (callee_locals > callee_parameters) { |
| 0 | 495 // The caller frame may need extending to accommodate |
| 496 // non-parameter locals of the first unpacked interpreted frame. | |
| 497 // Compute that adjustment. | |
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498 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
| 0 | 499 } |
| 500 | |
| 501 // If the sender is deoptimized the we must retrieve the address of the handler | |
| 502 // since the frame will "magically" show the original pc before the deopt | |
| 503 // and we'd undo the deopt. | |
| 504 | |
| 505 frame_pcs[0] = deopt_sender.raw_pc(); | |
| 506 | |
| 1692 | 507 #ifndef SHARK |
| 0 | 508 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
| 1692 | 509 #endif // SHARK |
| 0 | 510 |
| 511 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, | |
| 512 caller_adjustment * BytesPerWord, | |
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513 caller_was_method_handle ? 0 : callee_parameters, |
| 0 | 514 number_of_frames, |
| 515 frame_sizes, | |
| 516 frame_pcs, | |
| 517 return_type); | |
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518 // On some platforms, we need a way to pass some platform dependent |
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519 // information to the unpacking code so the skeletal frames come out |
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520 // correct (initial fp value, unextended sp, ...) |
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521 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
| 0 | 522 |
| 523 if (array->frames() > 1) { | |
| 524 if (VerifyStack && TraceDeoptimization) { | |
| 6843 | 525 ttyLocker ttyl; |
| 0 | 526 tty->print_cr("Deoptimizing method containing inlining"); |
| 527 } | |
| 528 } | |
| 529 | |
| 530 array->set_unroll_block(info); | |
| 531 return info; | |
| 532 } | |
| 533 | |
| 534 // Called to cleanup deoptimization data structures in normal case | |
| 535 // after unpacking to stack and when stack overflow error occurs | |
| 536 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
| 537 vframeArray *array) { | |
| 538 | |
| 539 // Get array if coming from exception | |
| 540 if (array == NULL) { | |
| 541 array = thread->vframe_array_head(); | |
| 542 } | |
| 543 thread->set_vframe_array_head(NULL); | |
| 544 | |
| 545 // Free the previous UnrollBlock | |
| 546 vframeArray* old_array = thread->vframe_array_last(); | |
| 547 thread->set_vframe_array_last(array); | |
| 548 | |
| 549 if (old_array != NULL) { | |
| 550 UnrollBlock* old_info = old_array->unroll_block(); | |
| 551 old_array->set_unroll_block(NULL); | |
| 552 delete old_info; | |
| 553 delete old_array; | |
| 554 } | |
| 555 | |
| 556 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
| 557 // inside the vframeArray (StackValueCollections) | |
| 558 | |
| 559 delete thread->deopt_mark(); | |
| 560 thread->set_deopt_mark(NULL); | |
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561 thread->set_deopt_nmethod(NULL); |
| 0 | 562 |
| 563 | |
| 564 if (JvmtiExport::can_pop_frame()) { | |
| 565 #ifndef CC_INTERP | |
| 566 // Regardless of whether we entered this routine with the pending | |
| 567 // popframe condition bit set, we should always clear it now | |
| 568 thread->clear_popframe_condition(); | |
| 569 #else | |
| 570 // C++ interpeter will clear has_pending_popframe when it enters | |
| 571 // with method_resume. For deopt_resume2 we clear it now. | |
| 572 if (thread->popframe_forcing_deopt_reexecution()) | |
| 573 thread->clear_popframe_condition(); | |
| 574 #endif /* CC_INTERP */ | |
| 575 } | |
| 576 | |
| 577 // unpack_frames() is called at the end of the deoptimization handler | |
| 578 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
| 579 // so that an asynchronous stack walker can work again. This counter is | |
| 580 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
| 581 // the beginning of uncommon_trap(). | |
| 582 thread->dec_in_deopt_handler(); | |
| 583 } | |
| 584 | |
| 585 | |
| 586 // Return BasicType of value being returned | |
| 587 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
| 588 | |
| 589 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
| 590 // allocate will be freed at the end of the routine. | |
| 591 | |
| 592 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
| 593 // but makes the entry a little slower. There is however a little dance we have to | |
| 594 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
| 595 ResetNoHandleMark rnhm; // No-op in release/product versions | |
| 596 HandleMark hm; | |
| 597 | |
| 598 frame stub_frame = thread->last_frame(); | |
| 599 | |
| 600 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
| 601 // must point to the vframeArray for the unpack frame. | |
| 602 vframeArray* array = thread->vframe_array_head(); | |
| 603 | |
| 604 #ifndef PRODUCT | |
| 605 if (TraceDeoptimization) { | |
| 6843 | 606 ttyLocker ttyl; |
| 0 | 607 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
| 608 } | |
| 609 #endif | |
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610 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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611 stub_frame.pc(), stub_frame.sp(), exec_mode); |
| 0 | 612 |
| 613 UnrollBlock* info = array->unroll_block(); | |
| 614 | |
| 615 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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616 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
| 0 | 617 |
| 618 BasicType bt = info->return_type(); | |
| 619 | |
| 620 // If we have an exception pending, claim that the return type is an oop | |
| 621 // so the deopt_blob does not overwrite the exception_oop. | |
| 622 | |
| 623 if (exec_mode == Unpack_exception) | |
| 624 bt = T_OBJECT; | |
| 625 | |
| 626 // Cleanup thread deopt data | |
| 627 cleanup_deopt_info(thread, array); | |
| 628 | |
| 629 #ifndef PRODUCT | |
| 630 if (VerifyStack) { | |
| 631 ResourceMark res_mark; | |
| 632 | |
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633 thread->validate_frame_layout(); |
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634 |
| 0 | 635 // Verify that the just-unpacked frames match the interpreter's |
| 636 // notions of expression stack and locals | |
| 637 vframeArray* cur_array = thread->vframe_array_last(); | |
| 638 RegisterMap rm(thread, false); | |
| 639 rm.set_include_argument_oops(false); | |
| 640 bool is_top_frame = true; | |
| 641 int callee_size_of_parameters = 0; | |
| 642 int callee_max_locals = 0; | |
| 643 for (int i = 0; i < cur_array->frames(); i++) { | |
| 644 vframeArrayElement* el = cur_array->element(i); | |
| 645 frame* iframe = el->iframe(); | |
| 646 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
| 647 | |
| 648 // Get the oop map for this bci | |
| 649 InterpreterOopMap mask; | |
| 650 int cur_invoke_parameter_size = 0; | |
| 651 bool try_next_mask = false; | |
| 652 int next_mask_expression_stack_size = -1; | |
| 653 int top_frame_expression_stack_adjustment = 0; | |
| 654 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
| 655 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
| 656 BytecodeStream str(mh); | |
| 657 str.set_start(iframe->interpreter_frame_bci()); | |
| 658 int max_bci = mh->code_size(); | |
| 659 // Get to the next bytecode if possible | |
| 660 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
| 661 // Check to see if we can grab the number of outgoing arguments | |
| 662 // at an uncommon trap for an invoke (where the compiler | |
| 663 // generates debug info before the invoke has executed) | |
| 664 Bytecodes::Code cur_code = str.next(); | |
| 665 if (cur_code == Bytecodes::_invokevirtual || | |
| 666 cur_code == Bytecodes::_invokespecial || | |
| 667 cur_code == Bytecodes::_invokestatic || | |
| 668 cur_code == Bytecodes::_invokeinterface) { | |
| 2142 | 669 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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670 Symbol* signature = invoke.signature(); |
| 0 | 671 ArgumentSizeComputer asc(signature); |
| 672 cur_invoke_parameter_size = asc.size(); | |
| 673 if (cur_code != Bytecodes::_invokestatic) { | |
| 674 // Add in receiver | |
| 675 ++cur_invoke_parameter_size; | |
| 676 } | |
| 677 } | |
| 678 if (str.bci() < max_bci) { | |
| 679 Bytecodes::Code bc = str.next(); | |
| 680 if (bc >= 0) { | |
| 681 // The interpreter oop map generator reports results before | |
| 682 // the current bytecode has executed except in the case of | |
| 683 // calls. It seems to be hard to tell whether the compiler | |
| 684 // has emitted debug information matching the "state before" | |
| 685 // a given bytecode or the state after, so we try both | |
| 686 switch (cur_code) { | |
| 687 case Bytecodes::_invokevirtual: | |
| 688 case Bytecodes::_invokespecial: | |
| 689 case Bytecodes::_invokestatic: | |
| 690 case Bytecodes::_invokeinterface: | |
| 691 case Bytecodes::_athrow: | |
| 692 break; | |
| 693 default: { | |
| 694 InterpreterOopMap next_mask; | |
| 695 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
| 696 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
| 697 // Need to subtract off the size of the result type of | |
| 698 // the bytecode because this is not described in the | |
| 699 // debug info but returned to the interpreter in the TOS | |
| 700 // caching register | |
| 701 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
| 702 if (bytecode_result_type != T_ILLEGAL) { | |
| 703 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
| 704 } | |
| 705 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
| 706 try_next_mask = true; | |
| 707 break; | |
| 708 } | |
| 709 } | |
| 710 } | |
| 711 } | |
| 712 | |
| 713 // Verify stack depth and oops in frame | |
| 714 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
| 715 if (!( | |
| 716 /* SPARC */ | |
| 717 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
| 718 /* x86 */ | |
| 719 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
| 720 (try_next_mask && | |
| 721 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
| 722 top_frame_expression_stack_adjustment))) || | |
| 723 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
| 724 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute) && | |
| 725 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) | |
| 726 )) { | |
| 727 ttyLocker ttyl; | |
| 728 | |
| 729 // Print out some information that will help us debug the problem | |
| 730 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
| 731 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
| 732 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
| 733 iframe->interpreter_frame_expression_stack_size()); | |
| 734 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
| 735 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
| 736 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
| 737 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
| 738 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
| 739 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
| 740 tty->print_cr(" exec_mode = %d", exec_mode); | |
| 741 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
| 742 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
| 743 tty->print_cr(" Interpreted frames:"); | |
| 744 for (int k = 0; k < cur_array->frames(); k++) { | |
| 745 vframeArrayElement* el = cur_array->element(k); | |
| 746 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
| 747 } | |
| 748 cur_array->print_on_2(tty); | |
| 749 guarantee(false, "wrong number of expression stack elements during deopt"); | |
| 750 } | |
| 751 VerifyOopClosure verify; | |
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752 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
| 0 | 753 callee_size_of_parameters = mh->size_of_parameters(); |
| 754 callee_max_locals = mh->max_locals(); | |
| 755 is_top_frame = false; | |
| 756 } | |
| 757 } | |
| 758 #endif /* !PRODUCT */ | |
| 759 | |
| 760 | |
| 761 return bt; | |
| 762 JRT_END | |
| 763 | |
| 764 | |
| 765 int Deoptimization::deoptimize_dependents() { | |
| 766 Threads::deoptimized_wrt_marked_nmethods(); | |
| 767 return 0; | |
| 768 } | |
| 769 | |
| 770 | |
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771 #if defined(COMPILER2) || defined(GRAAL) |
| 0 | 772 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
| 773 Handle pending_exception(thread->pending_exception()); | |
| 774 const char* exception_file = thread->exception_file(); | |
| 775 int exception_line = thread->exception_line(); | |
| 776 thread->clear_pending_exception(); | |
| 777 | |
| 778 for (int i = 0; i < objects->length(); i++) { | |
| 779 assert(objects->at(i)->is_object(), "invalid debug information"); | |
| 780 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
| 781 | |
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782 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 783 oop obj = NULL; |
| 784 | |
| 785 if (k->oop_is_instance()) { | |
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786 InstanceKlass* ik = InstanceKlass::cast(k()); |
| 0 | 787 obj = ik->allocate_instance(CHECK_(false)); |
| 788 } else if (k->oop_is_typeArray()) { | |
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789 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
| 0 | 790 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
| 791 int len = sv->field_size() / type2size[ak->element_type()]; | |
| 792 obj = ak->allocate(len, CHECK_(false)); | |
| 793 } else if (k->oop_is_objArray()) { | |
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794 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
| 0 | 795 obj = ak->allocate(sv->field_size(), CHECK_(false)); |
| 796 } | |
| 797 | |
| 798 assert(obj != NULL, "allocation failed"); | |
| 799 assert(sv->value().is_null(), "redundant reallocation"); | |
| 800 sv->set_value(obj); | |
| 801 } | |
| 802 | |
| 803 if (pending_exception.not_null()) { | |
| 804 thread->set_pending_exception(pending_exception(), exception_file, exception_line); | |
| 805 } | |
| 806 | |
| 807 return true; | |
| 808 } | |
| 809 | |
| 810 // restore elements of an eliminated type array | |
| 811 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
| 812 int index = 0; | |
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813 intptr_t val; |
| 0 | 814 |
| 815 for (int i = 0; i < sv->field_size(); i++) { | |
| 816 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
| 817 switch(type) { | |
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818 case T_LONG: case T_DOUBLE: { |
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819 assert(value->type() == T_INT, "Agreement."); |
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820 StackValue* low = |
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|
821 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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0
diff
changeset
|
822 #ifdef _LP64 |
|
52fed2ec0afb
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kvn
parents:
0
diff
changeset
|
823 jlong res = (jlong)low->get_int(); |
|
52fed2ec0afb
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parents:
0
diff
changeset
|
824 #else |
|
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0
diff
changeset
|
825 #ifdef SPARC |
|
52fed2ec0afb
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parents:
0
diff
changeset
|
826 // For SPARC we have to swap high and low words. |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
827 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
828 #else |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
829 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
830 #endif //SPARC |
|
52fed2ec0afb
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kvn
parents:
0
diff
changeset
|
831 #endif |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
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0
diff
changeset
|
832 obj->long_at_put(index, res); |
|
52fed2ec0afb
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kvn
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0
diff
changeset
|
833 break; |
|
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kvn
parents:
0
diff
changeset
|
834 } |
|
52fed2ec0afb
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parents:
0
diff
changeset
|
835 |
|
52fed2ec0afb
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parents:
0
diff
changeset
|
836 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
837 case T_INT: case T_FLOAT: // 4 bytes. |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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parents:
0
diff
changeset
|
838 assert(value->type() == T_INT, "Agreement."); |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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parents:
0
diff
changeset
|
839 val = value->get_int(); |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
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0
diff
changeset
|
840 obj->int_at_put(index, (jint)*((jint*)&val)); |
|
52fed2ec0afb
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kvn
parents:
0
diff
changeset
|
841 break; |
|
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parents:
0
diff
changeset
|
842 |
|
52fed2ec0afb
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kvn
parents:
0
diff
changeset
|
843 case T_SHORT: case T_CHAR: // 2 bytes |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
0
diff
changeset
|
844 assert(value->type() == T_INT, "Agreement."); |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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0
diff
changeset
|
845 val = value->get_int(); |
|
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6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
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diff
changeset
|
846 obj->short_at_put(index, (jshort)*((jint*)&val)); |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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parents:
0
diff
changeset
|
847 break; |
|
52fed2ec0afb
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diff
changeset
|
848 |
|
52fed2ec0afb
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0
diff
changeset
|
849 case T_BOOLEAN: case T_BYTE: // 1 byte |
|
52fed2ec0afb
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kvn
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0
diff
changeset
|
850 assert(value->type() == T_INT, "Agreement."); |
|
52fed2ec0afb
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parents:
0
diff
changeset
|
851 val = value->get_int(); |
|
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kvn
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0
diff
changeset
|
852 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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0
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changeset
|
853 break; |
|
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6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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diff
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|
854 |
| 0 | 855 default: |
| 856 ShouldNotReachHere(); | |
| 857 } | |
| 858 index++; | |
| 859 } | |
| 860 } | |
| 861 | |
| 862 // restore fields of an eliminated object array | |
| 863 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
| 864 for (int i = 0; i < sv->field_size(); i++) { | |
| 865 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
| 866 assert(value->type() == T_OBJECT, "object element expected"); | |
| 867 obj->obj_at_put(i, value->get_obj()()); | |
| 868 } | |
| 869 } | |
| 870 | |
|
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|
871 typedef struct { |
|
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|
872 int offset; |
|
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unify object reallocation code for c2 and Graal
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|
873 BasicType type; |
|
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unify object reallocation code for c2 and Graal
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|
874 } ReassignedField; |
|
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unify object reallocation code for c2 and Graal
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|
875 |
|
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unify object reallocation code for c2 and Graal
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|
876 int compare(ReassignedField* left, ReassignedField* right) { |
|
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unify object reallocation code for c2 and Graal
Lukas Stadler <lukas.stadler@jku.at>
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|
877 return left->offset - right->offset; |
|
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unify object reallocation code for c2 and Graal
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|
878 } |
|
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|
879 |
|
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Doug Simon <doug.simon@oracle.com>
diff
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|
880 // 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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diff
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|
881 // returned by HotSpotResolvedObjectType.getInstanceFields(true) |
|
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Doug Simon <doug.simon@oracle.com>
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|
882 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj) { |
|
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883 if (klass->superklass() != NULL) { |
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884 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj); |
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885 } |
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|
886 |
|
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|
887 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
|
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888 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
|
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|
889 if (!fs.access_flags().is_static()) { |
|
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|
890 ReassignedField field; |
|
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|
891 field.offset = fs.offset(); |
|
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|
892 field.type = FieldType::basic_type(fs.signature()); |
|
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unify object reallocation code for c2 and Graal
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|
893 fields->append(field); |
|
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|
894 } |
|
7137
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|
895 } |
|
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unify object reallocation code for c2 and Graal
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|
896 fields->sort(compare); |
|
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|
897 for (int i = 0; i < fields->length(); i++) { |
|
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|
898 intptr_t val; |
|
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|
899 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(svIndex)); |
|
7137
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|
900 int offset = fields->at(i).offset; |
|
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|
901 BasicType type = fields->at(i).type; |
|
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Doug Simon <doug.simon@oracle.com>
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|
902 switch (type) { |
|
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Doug Simon <doug.simon@oracle.com>
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|
903 case T_OBJECT: case T_ARRAY: |
|
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diff
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|
904 assert(value->type() == T_OBJECT, "Agreement."); |
|
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Doug Simon <doug.simon@oracle.com>
diff
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|
905 obj->obj_field_put(offset, value->get_obj()()); |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
906 break; |
|
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
907 |
|
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
908 case T_LONG: case T_DOUBLE: { |
|
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Doug Simon <doug.simon@oracle.com>
diff
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|
909 assert(value->type() == T_INT, "Agreement."); |
|
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
910 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
|
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Doug Simon <doug.simon@oracle.com>
diff
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|
911 #ifdef _LP64 |
|
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|
912 jlong res = (jlong)low->get_int(); |
|
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Doug Simon <doug.simon@oracle.com>
diff
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|
913 #else |
|
e522a00b91aa
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diff
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|
914 #ifdef SPARC |
|
e522a00b91aa
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diff
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|
915 // For SPARC we have to swap high and low words. |
|
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
diff
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|
916 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
|
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diff
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|
917 #else |
|
e522a00b91aa
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|
918 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
|
e522a00b91aa
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|
919 #endif //SPARC |
|
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|
920 #endif |
|
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|
921 obj->long_field_put(offset, res); |
|
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|
922 break; |
|
e522a00b91aa
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|
923 } |
|
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|
924 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
|
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|
925 case T_INT: case T_FLOAT: // 4 bytes. |
|
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diff
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|
926 assert(value->type() == T_INT, "Agreement."); |
|
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|
927 val = value->get_int(); |
|
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Doug Simon <doug.simon@oracle.com>
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|
928 obj->int_field_put(offset, (jint)*((jint*)&val)); |
|
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diff
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|
929 break; |
|
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Doug Simon <doug.simon@oracle.com>
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changeset
|
930 |
|
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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|
931 case T_SHORT: case T_CHAR: // 2 bytes |
|
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Doug Simon <doug.simon@oracle.com>
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|
932 assert(value->type() == T_INT, "Agreement."); |
|
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
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|
933 val = value->get_int(); |
|
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Doug Simon <doug.simon@oracle.com>
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changeset
|
934 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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|
935 break; |
|
e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
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|
936 |
|
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Doug Simon <doug.simon@oracle.com>
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|
937 case T_BOOLEAN: case T_BYTE: // 1 byte |
|
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938 assert(value->type() == T_INT, "Agreement."); |
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939 val = value->get_int(); |
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940 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
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941 break; |
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942 |
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943 default: |
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944 ShouldNotReachHere(); |
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945 } |
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946 svIndex++; |
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947 } |
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948 return svIndex; |
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949 } |
| 0 | 950 |
| 951 // restore fields of all eliminated objects and arrays | |
| 952 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects) { | |
| 953 for (int i = 0; i < objects->length(); i++) { | |
| 954 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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955 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 956 Handle obj = sv->value(); |
| 957 assert(obj.not_null(), "reallocation was missed"); | |
|
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958 if (PrintDeoptimizationDetails) { |
|
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959 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
|
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960 } |
| 0 | 961 |
| 962 if (k->oop_is_instance()) { | |
|
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963 InstanceKlass* ik = InstanceKlass::cast(k()); |
|
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964 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj()); |
| 0 | 965 } else if (k->oop_is_typeArray()) { |
|
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966 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
| 0 | 967 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
| 968 } else if (k->oop_is_objArray()) { | |
| 969 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
| 970 } | |
| 971 } | |
| 972 } | |
| 973 | |
| 974 | |
| 975 // relock objects for which synchronization was eliminated | |
|
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976 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread) { |
| 0 | 977 for (int i = 0; i < monitors->length(); i++) { |
|
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978 MonitorInfo* mon_info = monitors->at(i); |
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979 if (mon_info->eliminated()) { |
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980 assert(mon_info->owner() != NULL, "reallocation was missed"); |
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981 Handle obj = Handle(mon_info->owner()); |
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982 markOop mark = obj->mark(); |
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983 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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984 // New allocated objects may have the mark set to anonymously biased. |
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985 // Also the deoptimized method may called methods with synchronization |
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986 // where the thread-local object is bias locked to the current thread. |
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987 assert(mark->is_biased_anonymously() || |
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988 mark->biased_locker() == thread, "should be locked to current thread"); |
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989 // Reset mark word to unbiased prototype. |
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990 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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991 obj->set_mark(unbiased_prototype); |
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992 } |
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993 BasicLock* lock = mon_info->lock(); |
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994 ObjectSynchronizer::slow_enter(obj, lock, thread); |
| 0 | 995 } |
|
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996 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
| 0 | 997 } |
| 998 } | |
| 999 | |
| 1000 | |
| 1001 #ifndef PRODUCT | |
| 1002 // print information about reallocated objects | |
| 1003 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects) { | |
| 1004 fieldDescriptor fd; | |
| 1005 | |
| 1006 for (int i = 0; i < objects->length(); i++) { | |
| 1007 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
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1008 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 1009 Handle obj = sv->value(); |
| 1010 | |
| 1011 tty->print(" object <" INTPTR_FORMAT "> of type ", sv->value()()); | |
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1012 k->print_value(); |
| 0 | 1013 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
| 1014 tty->cr(); | |
| 1015 | |
| 1016 if (Verbose) { | |
| 1017 k->oop_print_on(obj(), tty); | |
| 1018 } | |
| 1019 } | |
| 1020 } | |
| 1021 #endif | |
|
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1022 #endif // COMPILER2 || GRAAL |
| 0 | 1023 |
| 1024 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk) { | |
|
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1025 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
| 0 | 1026 |
| 1027 #ifndef PRODUCT | |
|
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1028 if (PrintDeoptimizationDetails) { |
| 0 | 1029 ttyLocker ttyl; |
| 1030 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
| 1031 fr.print_on(tty); | |
| 1032 tty->print_cr(" Virtual frames (innermost first):"); | |
| 1033 for (int index = 0; index < chunk->length(); index++) { | |
| 1034 compiledVFrame* vf = chunk->at(index); | |
| 1035 tty->print(" %2d - ", index); | |
| 1036 vf->print_value(); | |
| 1037 int bci = chunk->at(index)->raw_bci(); | |
| 1038 const char* code_name; | |
| 1039 if (bci == SynchronizationEntryBCI) { | |
| 1040 code_name = "sync entry"; | |
| 1041 } else { | |
| 2142 | 1042 Bytecodes::Code code = vf->method()->code_at(bci); |
| 0 | 1043 code_name = Bytecodes::name(code); |
| 1044 } | |
| 1045 tty->print(" - %s", code_name); | |
| 1046 tty->print_cr(" @ bci %d ", bci); | |
| 1047 if (Verbose) { | |
| 1048 vf->print(); | |
| 1049 tty->cr(); | |
| 1050 } | |
| 1051 } | |
| 1052 } | |
| 1053 #endif | |
| 1054 | |
| 1055 // Register map for next frame (used for stack crawl). We capture | |
| 1056 // the state of the deopt'ing frame's caller. Thus if we need to | |
| 1057 // stuff a C2I adapter we can properly fill in the callee-save | |
| 1058 // register locations. | |
| 1059 frame caller = fr.sender(reg_map); | |
| 1060 int frame_size = caller.sp() - fr.sp(); | |
| 1061 | |
| 1062 frame sender = caller; | |
| 1063 | |
| 1064 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
| 1065 // the vframeArray containing the unpacking information is allocated in the C heap. | |
| 1066 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
| 1067 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr); | |
| 1068 | |
| 1069 // Compare the vframeArray to the collected vframes | |
| 1070 assert(array->structural_compare(thread, chunk), "just checking"); | |
| 1071 | |
| 1072 #ifndef PRODUCT | |
|
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1073 if (PrintDeoptimizationDetails) { |
| 0 | 1074 ttyLocker ttyl; |
| 1075 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
| 1076 } | |
| 1077 #endif // PRODUCT | |
| 1078 | |
| 1079 return array; | |
| 1080 } | |
| 1081 | |
| 1082 | |
| 1083 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
| 1084 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
| 1085 for (int i = 0; i < monitors->length(); i++) { | |
| 1086 MonitorInfo* mon_info = monitors->at(i); | |
|
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1087 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
| 0 | 1088 objects_to_revoke->append(Handle(mon_info->owner())); |
| 1089 } | |
| 1090 } | |
| 1091 } | |
| 1092 | |
| 1093 | |
| 1094 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
| 1095 if (!UseBiasedLocking) { | |
| 1096 return; | |
| 1097 } | |
| 1098 | |
| 1099 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 1100 | |
| 1101 // Unfortunately we don't have a RegisterMap available in most of | |
| 1102 // the places we want to call this routine so we need to walk the | |
| 1103 // stack again to update the register map. | |
| 1104 if (map == NULL || !map->update_map()) { | |
| 1105 StackFrameStream sfs(thread, true); | |
| 1106 bool found = false; | |
| 1107 while (!found && !sfs.is_done()) { | |
| 1108 frame* cur = sfs.current(); | |
| 1109 sfs.next(); | |
| 1110 found = cur->id() == fr.id(); | |
| 1111 } | |
| 1112 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
| 1113 map = sfs.register_map(); | |
| 1114 } | |
| 1115 | |
| 1116 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
| 1117 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1118 // Revoke monitors' biases in all scopes | |
| 1119 while (!cvf->is_top()) { | |
| 1120 collect_monitors(cvf, objects_to_revoke); | |
| 1121 cvf = compiledVFrame::cast(cvf->sender()); | |
| 1122 } | |
| 1123 collect_monitors(cvf, objects_to_revoke); | |
| 1124 | |
| 1125 if (SafepointSynchronize::is_at_safepoint()) { | |
| 1126 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
| 1127 } else { | |
| 1128 BiasedLocking::revoke(objects_to_revoke); | |
| 1129 } | |
| 1130 } | |
| 1131 | |
| 1132 | |
| 1133 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
| 1134 if (!UseBiasedLocking) { | |
| 1135 return; | |
| 1136 } | |
| 1137 | |
| 1138 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
| 1139 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 1140 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
| 1141 if (jt->has_last_Java_frame()) { | |
| 1142 StackFrameStream sfs(jt, true); | |
| 1143 while (!sfs.is_done()) { | |
| 1144 frame* cur = sfs.current(); | |
| 1145 if (cb->contains(cur->pc())) { | |
| 1146 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
| 1147 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1148 // Revoke monitors' biases in all scopes | |
| 1149 while (!cvf->is_top()) { | |
| 1150 collect_monitors(cvf, objects_to_revoke); | |
| 1151 cvf = compiledVFrame::cast(cvf->sender()); | |
| 1152 } | |
| 1153 collect_monitors(cvf, objects_to_revoke); | |
| 1154 } | |
| 1155 sfs.next(); | |
| 1156 } | |
| 1157 } | |
| 1158 } | |
| 1159 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
| 1160 } | |
| 1161 | |
| 1162 | |
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1163 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
| 0 | 1164 assert(fr.can_be_deoptimized(), "checking frame type"); |
| 1165 | |
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1166 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
| 0 | 1167 |
| 1168 // Patch the nmethod so that when execution returns to it we will | |
| 1169 // deopt the execution state and return to the interpreter. | |
| 1170 fr.deoptimize(thread); | |
| 1171 } | |
| 1172 | |
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1173 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
| 0 | 1174 // Deoptimize only if the frame comes from compile code. |
| 1175 // Do not deoptimize the frame which is already patched | |
| 1176 // during the execution of the loops below. | |
| 1177 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
| 1178 return; | |
| 1179 } | |
| 1180 ResourceMark rm; | |
| 1181 DeoptimizationMarker dm; | |
| 1182 if (UseBiasedLocking) { | |
| 1183 revoke_biases_of_monitors(thread, fr, map); | |
| 1184 } | |
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1185 deoptimize_single_frame(thread, fr, reason); |
| 0 | 1186 |
| 1187 } | |
| 1188 | |
| 1189 | |
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1190 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1191 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
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1192 "can only deoptimize other thread at a safepoint"); |
| 0 | 1193 // Compute frame and register map based on thread and sp. |
| 1194 RegisterMap reg_map(thread, UseBiasedLocking); | |
| 1195 frame fr = thread->last_frame(); | |
| 1196 while (fr.id() != id) { | |
| 1197 fr = fr.sender(®_map); | |
| 1198 } | |
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1199 deoptimize(thread, fr, ®_map, reason); |
| 0 | 1200 } |
| 1201 | |
| 1202 | |
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1203 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
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1204 if (thread == Thread::current()) { |
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1205 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
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1206 } else { |
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1207 VM_DeoptimizeFrame deopt(thread, id, reason); |
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1208 VMThread::execute(&deopt); |
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1209 } |
|
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
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|
1210 } |
|
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
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|
1211 |
|
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diff
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|
1212 |
| 0 | 1213 // JVMTI PopFrame support |
| 1214 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
| 1215 { | |
| 1216 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
| 1217 } | |
| 1218 JRT_END | |
| 1219 | |
| 1220 | |
|
4978
99d3d8a72252
More ifdef GRAAL usage.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
4970
diff
changeset
|
1221 #if defined(COMPILER2) || defined(SHARK) || defined(GRAAL) |
| 0 | 1222 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
| 1223 // in case of an unresolved klass entry, load the class. | |
| 1224 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
1225 Klass* tk = constant_pool->klass_at(index, CHECK); |
| 0 | 1226 return; |
| 1227 } | |
| 1228 | |
| 1229 if (!constant_pool->tag_at(index).is_symbol()) return; | |
| 1230 | |
|
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
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6853
diff
changeset
|
1231 Handle class_loader (THREAD, constant_pool->pool_holder()->class_loader()); |
|
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|
1232 Symbol* symbol = constant_pool->symbol_at(index); |
| 0 | 1233 |
| 1234 // class name? | |
| 1235 if (symbol->byte_at(0) != '(') { | |
|
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changeset
|
1236 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
| 0 | 1237 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
| 1238 return; | |
| 1239 } | |
| 1240 | |
| 1241 // then it must be a signature! | |
|
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|
1242 ResourceMark rm(THREAD); |
| 0 | 1243 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
| 1244 if (ss.is_object()) { | |
|
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|
1245 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
|
1246 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
| 0 | 1247 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
| 1248 } | |
| 1249 } | |
| 1250 } | |
| 1251 | |
| 1252 | |
| 1253 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
| 1254 EXCEPTION_MARK; | |
| 1255 load_class_by_index(constant_pool, index, THREAD); | |
| 1256 if (HAS_PENDING_EXCEPTION) { | |
| 1257 // Exception happened during classloading. We ignore the exception here, since it | |
| 1258 // is going to be rethrown since the current activation is going to be deoptimzied and | |
| 1259 // the interpreter will re-execute the bytecode. | |
| 1260 CLEAR_PENDING_EXCEPTION; | |
| 1261 } | |
| 1262 } | |
| 1263 | |
| 1264 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
| 1265 HandleMark hm; | |
| 1266 | |
| 1267 // uncommon_trap() is called at the beginning of the uncommon trap | |
| 1268 // handler. Note this fact before we start generating temporary frames | |
| 1269 // that can confuse an asynchronous stack walker. This counter is | |
| 1270 // decremented at the end of unpack_frames(). | |
| 1271 thread->inc_in_deopt_handler(); | |
| 1272 | |
| 1273 // 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
|
1274 #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
|
1275 // (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
|
1276 RegisterMap reg_map(thread, true); |
|
6278ac5829ce
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Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1277 #else |
| 0 | 1278 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
|
1279 #endif |
| 0 | 1280 frame stub_frame = thread->last_frame(); |
| 1281 frame fr = stub_frame.sender(®_map); | |
| 1282 // Make sure the calling nmethod is not getting deoptimized and removed | |
| 1283 // before we are done with it. | |
| 1284 nmethodLocker nl(fr.pc()); | |
| 1285 | |
|
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1286 // Log a message |
|
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|
1287 Events::log(thread, "Uncommon trap: trap_request=" PTR32_FORMAT " fr.pc=" INTPTR_FORMAT, |
|
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|
1288 trap_request, fr.pc()); |
|
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|
1289 |
| 0 | 1290 { |
| 1291 ResourceMark rm; | |
| 1292 | |
| 1293 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
| 1294 revoke_biases_of_monitors(thread, fr, ®_map); | |
| 1295 | |
| 1296 DeoptReason reason = trap_request_reason(trap_request); | |
| 1297 DeoptAction action = trap_request_action(trap_request); | |
| 1298 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 | |
| 1299 | |
| 1300 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
| 1301 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1302 | |
| 1303 nmethod* nm = cvf->code(); | |
| 1304 | |
| 1305 ScopeDesc* trap_scope = cvf->scope(); | |
|
3017
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Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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|
1306 |
|
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1307 if (TraceDeoptimization) { |
|
4674
e1c053324210
changed TraceDeoptimization output
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4668
diff
changeset
|
1308 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()); |
| 5749 | 1309 #ifdef GRAAL |
|
3558
bc95d122df79
added runtime call to supply info upon deoptimization
Lukas Stadler <lukas.stadler@jku.at>
parents:
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diff
changeset
|
1310 if (thread->graal_deopt_info() != NULL) { |
|
bc95d122df79
added runtime call to supply info upon deoptimization
Lukas Stadler <lukas.stadler@jku.at>
parents:
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diff
changeset
|
1311 oop deopt_info = thread->graal_deopt_info(); |
|
bc95d122df79
added runtime call to supply info upon deoptimization
Lukas Stadler <lukas.stadler@jku.at>
parents:
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diff
changeset
|
1312 if (java_lang_String::is_instance(deopt_info)) { |
|
7154
5d0bb7d52783
changes to support Graal co-existing with the other HotSpot compiler(s) and being used for explicit compilation requests and code installation via the Graal API
Doug Simon <doug.simon@oracle.com>
parents:
7137
diff
changeset
|
1313 char buf[O_BUFLEN]; |
|
5d0bb7d52783
changes to support Graal co-existing with the other HotSpot compiler(s) and being used for explicit compilation requests and code installation via the Graal API
Doug Simon <doug.simon@oracle.com>
parents:
7137
diff
changeset
|
1314 java_lang_String::as_utf8_string(deopt_info, buf, O_BUFLEN); |
|
3558
bc95d122df79
added runtime call to supply info upon deoptimization
Lukas Stadler <lukas.stadler@jku.at>
parents:
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diff
changeset
|
1315 tty->print_cr("deopt info: %s", buf); |
|
bc95d122df79
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Lukas Stadler <lukas.stadler@jku.at>
parents:
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|
1316 } else { |
|
bc95d122df79
added runtime call to supply info upon deoptimization
Lukas Stadler <lukas.stadler@jku.at>
parents:
3464
diff
changeset
|
1317 tty->print_cr("deopt info:"); |
|
bc95d122df79
added runtime call to supply info upon deoptimization
Lukas Stadler <lukas.stadler@jku.at>
parents:
3464
diff
changeset
|
1318 deopt_info->print(); |
|
bc95d122df79
added runtime call to supply info upon deoptimization
Lukas Stadler <lukas.stadler@jku.at>
parents:
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diff
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|
1319 } |
|
bc95d122df79
added runtime call to supply info upon deoptimization
Lukas Stadler <lukas.stadler@jku.at>
parents:
3464
diff
changeset
|
1320 thread->set_graal_deopt_info(NULL); |
|
bc95d122df79
added runtime call to supply info upon deoptimization
Lukas Stadler <lukas.stadler@jku.at>
parents:
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diff
changeset
|
1321 } |
| 5749 | 1322 #endif |
|
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1323 } |
| 0 | 1324 |
| 1325 methodHandle trap_method = trap_scope->method(); | |
| 1326 int trap_bci = trap_scope->bci(); | |
| 2142 | 1327 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
| 0 | 1328 |
|
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
|
1329 if (trap_scope->rethrow_exception()) { |
|
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
4661
diff
changeset
|
1330 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
|
1331 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
|
1332 } |
|
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
|
1333 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
|
1334 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
|
1335 ScopeValue* topOfStack = expressions->top(); |
|
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 Handle topOfStackObj = cvf->create_stack_value(topOfStack)->get_obj(); |
|
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
|
1337 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
|
1338 } |
|
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 |
| 0 | 1340 // Record this event in the histogram. |
| 1341 gather_statistics(reason, action, trap_bc); | |
| 1342 | |
| 1343 // Ensure that we can record deopt. history: | |
| 1344 bool create_if_missing = ProfileTraps; | |
| 1345 | |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
1346 MethodData* trap_mdo = |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
1347 get_method_data(thread, trap_method, create_if_missing); |
| 0 | 1348 |
|
7193
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1349 // Log a message |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1350 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
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6940
diff
changeset
|
1351 trap_reason_name(reason), trap_action_name(action), fr.pc(), |
|
ee32440febeb
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vlivanov
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6940
diff
changeset
|
1352 trap_method->name_and_sig_as_C_string(), trap_bci); |
|
ee32440febeb
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vlivanov
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6940
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changeset
|
1353 |
| 0 | 1354 // Print a bunch of diagnostics, if requested. |
| 1355 if (TraceDeoptimization || LogCompilation) { | |
| 1356 ResourceMark rm; | |
| 1357 ttyLocker ttyl; | |
| 1358 char buf[100]; | |
| 1359 if (xtty != NULL) { | |
| 1360 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
| 1361 os::current_thread_id(), | |
| 1362 format_trap_request(buf, sizeof(buf), trap_request)); | |
| 1363 nm->log_identity(xtty); | |
| 1364 } | |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2142
diff
changeset
|
1365 Symbol* class_name = NULL; |
| 0 | 1366 bool unresolved = false; |
| 1367 if (unloaded_class_index >= 0) { | |
| 1368 constantPoolHandle constants (THREAD, trap_method->constants()); | |
| 1369 if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { | |
|
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coleenp
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diff
changeset
|
1370 class_name = constants->klass_name_at(unloaded_class_index); |
| 0 | 1371 unresolved = true; |
| 1372 if (xtty != NULL) | |
| 1373 xtty->print(" unresolved='1'"); | |
| 1374 } else if (constants->tag_at(unloaded_class_index).is_symbol()) { | |
|
2177
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changeset
|
1375 class_name = constants->symbol_at(unloaded_class_index); |
| 0 | 1376 } |
| 1377 if (xtty != NULL) | |
| 1378 xtty->name(class_name); | |
| 1379 } | |
|
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|
1380 if (xtty != NULL && trap_mdo != NULL) { |
| 0 | 1381 // Dump the relevant MDO state. |
| 1382 // This is the deopt count for the current reason, any previous | |
| 1383 // reasons or recompiles seen at this point. | |
| 1384 int dcnt = trap_mdo->trap_count(reason); | |
| 1385 if (dcnt != 0) | |
| 1386 xtty->print(" count='%d'", dcnt); | |
| 1387 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
| 1388 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
| 1389 if (dos != 0) { | |
| 1390 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
| 1391 if (trap_state_is_recompiled(dos)) { | |
| 1392 int recnt2 = trap_mdo->overflow_recompile_count(); | |
| 1393 if (recnt2 != 0) | |
| 1394 xtty->print(" recompiles2='%d'", recnt2); | |
| 1395 } | |
| 1396 } | |
| 1397 } | |
| 1398 if (xtty != NULL) { | |
| 1399 xtty->stamp(); | |
| 1400 xtty->end_head(); | |
| 1401 } | |
| 1402 if (TraceDeoptimization) { // make noise on the tty | |
| 1403 tty->print("Uncommon trap occurred in"); | |
| 1404 nm->method()->print_short_name(tty); | |
| 6843 | 1405 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d", |
| 0 | 1406 fr.pc(), |
| 6843 | 1407 os::current_thread_id(), |
| 0 | 1408 trap_reason_name(reason), |
| 1409 trap_action_name(action), | |
| 1410 unloaded_class_index); | |
|
2177
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changeset
|
1411 if (class_name != NULL) { |
| 0 | 1412 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
| 1413 class_name->print_symbol_on(tty); | |
| 1414 } | |
| 1415 tty->cr(); | |
| 1416 } | |
| 1417 if (xtty != NULL) { | |
| 1418 // Log the precise location of the trap. | |
| 1419 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
| 1420 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
| 1421 xtty->method(sd->method()); | |
| 1422 xtty->end_elem(); | |
| 1423 if (sd->is_top()) break; | |
| 1424 } | |
| 1425 xtty->tail("uncommon_trap"); | |
| 1426 } | |
| 1427 } | |
| 1428 // (End diagnostic printout.) | |
| 1429 | |
| 1430 // Load class if necessary | |
| 1431 if (unloaded_class_index >= 0) { | |
| 1432 constantPoolHandle constants(THREAD, trap_method->constants()); | |
| 1433 load_class_by_index(constants, unloaded_class_index); | |
| 1434 } | |
| 1435 | |
| 1436 // Flush the nmethod if necessary and desirable. | |
| 1437 // | |
| 1438 // We need to avoid situations where we are re-flushing the nmethod | |
| 1439 // because of a hot deoptimization site. Repeated flushes at the same | |
| 1440 // point need to be detected by the compiler and avoided. If the compiler | |
| 1441 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
| 1442 // module must take measures to avoid an infinite cycle of recompilation | |
| 1443 // and deoptimization. There are several such measures: | |
| 1444 // | |
| 1445 // 1. If a recompilation is ordered a second time at some site X | |
| 1446 // and for the same reason R, the action is adjusted to 'reinterpret', | |
| 1447 // to give the interpreter time to exercise the method more thoroughly. | |
| 1448 // If this happens, the method's overflow_recompile_count is incremented. | |
| 1449 // | |
| 1450 // 2. If the compiler fails to reduce the deoptimization rate, then | |
| 1451 // the method's overflow_recompile_count will begin to exceed the set | |
| 1452 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
| 1453 // is adjusted to 'make_not_compilable', and the method is abandoned | |
| 1454 // to the interpreter. This is a performance hit for hot methods, | |
| 1455 // but is better than a disastrous infinite cycle of recompilations. | |
| 1456 // (Actually, only the method containing the site X is abandoned.) | |
| 1457 // | |
| 1458 // 3. In parallel with the previous measures, if the total number of | |
| 1459 // recompilations of a method exceeds the much larger set limit | |
| 1460 // PerMethodRecompilationCutoff, the method is abandoned. | |
| 1461 // This should only happen if the method is very large and has | |
| 1462 // many "lukewarm" deoptimizations. The code which enforces this | |
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1463 // limit is elsewhere (class nmethod, class Method). |
| 0 | 1464 // |
| 1465 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
| 1466 // to recompile at each bytecode independently of the per-BCI cutoff. | |
| 1467 // | |
| 1468 // The decision to update code is up to the compiler, and is encoded | |
| 1469 // in the Action_xxx code. If the compiler requests Action_none | |
| 1470 // no trap state is changed, no compiled code is changed, and the | |
| 1471 // computation suffers along in the interpreter. | |
| 1472 // | |
| 1473 // The other action codes specify various tactics for decompilation | |
| 1474 // and recompilation. Action_maybe_recompile is the loosest, and | |
| 1475 // allows the compiled code to stay around until enough traps are seen, | |
| 1476 // and until the compiler gets around to recompiling the trapping method. | |
| 1477 // | |
| 1478 // The other actions cause immediate removal of the present code. | |
| 1479 | |
| 1480 bool update_trap_state = true; | |
| 1481 bool make_not_entrant = false; | |
| 1482 bool make_not_compilable = false; | |
| 1783 | 1483 bool reprofile = false; |
| 0 | 1484 switch (action) { |
| 1485 case Action_none: | |
| 1486 // Keep the old code. | |
| 1487 update_trap_state = false; | |
| 1488 break; | |
| 1489 case Action_maybe_recompile: | |
| 1490 // Do not need to invalidate the present code, but we can | |
| 1491 // initiate another | |
| 1492 // Start compiler without (necessarily) invalidating the nmethod. | |
| 1493 // The system will tolerate the old code, but new code should be | |
| 1494 // generated when possible. | |
| 1495 break; | |
| 1496 case Action_reinterpret: | |
| 1497 // Go back into the interpreter for a while, and then consider | |
| 1498 // recompiling form scratch. | |
| 1499 make_not_entrant = true; | |
| 1500 // Reset invocation counter for outer most method. | |
| 1501 // This will allow the interpreter to exercise the bytecodes | |
| 1502 // for a while before recompiling. | |
| 1503 // By contrast, Action_make_not_entrant is immediate. | |
| 1504 // | |
| 1505 // Note that the compiler will track null_check, null_assert, | |
| 1506 // range_check, and class_check events and log them as if they | |
| 1507 // had been traps taken from compiled code. This will update | |
| 1508 // the MDO trap history so that the next compilation will | |
| 1509 // properly detect hot trap sites. | |
| 1783 | 1510 reprofile = true; |
| 0 | 1511 break; |
| 1512 case Action_make_not_entrant: | |
| 1513 // Request immediate recompilation, and get rid of the old code. | |
| 1514 // Make them not entrant, so next time they are called they get | |
| 1515 // recompiled. Unloaded classes are loaded now so recompile before next | |
| 1516 // time they are called. Same for uninitialized. The interpreter will | |
| 1517 // link the missing class, if any. | |
| 1518 make_not_entrant = true; | |
| 1519 break; | |
| 1520 case Action_make_not_compilable: | |
| 1521 // Give up on compiling this method at all. | |
| 1522 make_not_entrant = true; | |
| 1523 make_not_compilable = true; | |
| 1524 break; | |
| 1525 default: | |
| 1526 ShouldNotReachHere(); | |
| 1527 } | |
| 1528 | |
| 1529 // Setting +ProfileTraps fixes the following, on all platforms: | |
| 1530 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
| 1531 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
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1532 // recompile relies on a MethodData* to record heroic opt failures. |
| 0 | 1533 |
| 1534 // Whether the interpreter is producing MDO data or not, we also need | |
| 1535 // to use the MDO to detect hot deoptimization points and control | |
| 1536 // aggressive optimization. | |
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1537 bool inc_recompile_count = false; |
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1538 ProfileData* pdata = NULL; |
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1539 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
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1540 assert(trap_mdo == get_method_data(thread, trap_method, false), "sanity"); |
| 0 | 1541 uint this_trap_count = 0; |
| 1542 bool maybe_prior_trap = false; | |
| 1543 bool maybe_prior_recompile = false; | |
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1544 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
| 0 | 1545 //outputs: |
| 1546 this_trap_count, | |
| 1547 maybe_prior_trap, | |
| 1548 maybe_prior_recompile); | |
| 1549 // Because the interpreter also counts null, div0, range, and class | |
| 1550 // checks, these traps from compiled code are double-counted. | |
| 1551 // This is harmless; it just means that the PerXTrapLimit values | |
| 1552 // are in effect a little smaller than they look. | |
| 1553 | |
| 1554 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
| 1555 if (per_bc_reason != Reason_none) { | |
| 1556 // Now take action based on the partially known per-BCI history. | |
| 1557 if (maybe_prior_trap | |
| 1558 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
| 1559 // If there are too many traps at this BCI, force a recompile. | |
| 1560 // This will allow the compiler to see the limit overflow, and | |
| 1561 // take corrective action, if possible. The compiler generally | |
| 1562 // does not use the exact PerBytecodeTrapLimit value, but instead | |
| 1563 // changes its tactics if it sees any traps at all. This provides | |
| 1564 // a little hysteresis, delaying a recompile until a trap happens | |
| 1565 // several times. | |
| 1566 // | |
| 1567 // Actually, since there is only one bit of counter per BCI, | |
| 1568 // the possible per-BCI counts are {0,1,(per-method count)}. | |
| 1569 // This produces accurate results if in fact there is only | |
| 1570 // one hot trap site, but begins to get fuzzy if there are | |
| 1571 // many sites. For example, if there are ten sites each | |
| 1572 // trapping two or more times, they each get the blame for | |
| 1573 // all of their traps. | |
| 1574 make_not_entrant = true; | |
| 1575 } | |
| 1576 | |
| 1577 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
| 1578 if (make_not_entrant && maybe_prior_recompile) { | |
| 1579 // More than one recompile at this point. | |
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1580 inc_recompile_count = maybe_prior_trap; |
| 0 | 1581 } |
| 1582 } else { | |
| 1583 // For reasons which are not recorded per-bytecode, we simply | |
| 1584 // force recompiles unconditionally. | |
| 1585 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
| 1586 make_not_entrant = true; | |
| 1587 } | |
| 1588 | |
| 1589 // Go back to the compiler if there are too many traps in this method. | |
| 1590 if (this_trap_count >= (uint)PerMethodTrapLimit) { | |
| 1591 // If there are too many traps in this method, force a recompile. | |
| 1592 // This will allow the compiler to see the limit overflow, and | |
| 1593 // take corrective action, if possible. | |
| 1594 // (This condition is an unlikely backstop only, because the | |
| 1595 // PerBytecodeTrapLimit is more likely to take effect first, | |
| 1596 // if it is applicable.) | |
| 1597 make_not_entrant = true; | |
| 1598 } | |
| 1599 | |
| 1600 // Here's more hysteresis: If there has been a recompile at | |
| 1601 // this trap point already, run the method in the interpreter | |
| 1602 // for a while to exercise it more thoroughly. | |
| 1603 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
| 1783 | 1604 reprofile = true; |
| 0 | 1605 } |
| 1606 | |
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1607 } |
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1608 |
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1609 // Take requested actions on the method: |
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1610 |
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1611 // Recompile |
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1612 if (make_not_entrant) { |
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1613 if (!nm->make_not_entrant()) { |
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1614 return; // the call did not change nmethod's state |
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1615 } |
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1616 |
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1617 if (pdata != NULL) { |
| 0 | 1618 // Record the recompilation event, if any. |
| 1619 int tstate0 = pdata->trap_state(); | |
| 1620 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
| 1621 if (tstate1 != tstate0) | |
| 1622 pdata->set_trap_state(tstate1); | |
| 1623 } | |
| 1624 } | |
| 1625 | |
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1626 if (inc_recompile_count) { |
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1627 trap_mdo->inc_overflow_recompile_count(); |
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1628 if ((uint)trap_mdo->overflow_recompile_count() > |
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1629 (uint)PerBytecodeRecompilationCutoff) { |
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1630 // Give up on the method containing the bad BCI. |
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1631 if (trap_method() == nm->method()) { |
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1632 make_not_compilable = true; |
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1633 } else { |
| 1783 | 1634 trap_method->set_not_compilable(CompLevel_full_optimization); |
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1635 // But give grace to the enclosing nm->method(). |
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1636 } |
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1637 } |
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1638 } |
| 0 | 1639 |
| 1783 | 1640 // Reprofile |
| 1641 if (reprofile) { | |
| 1642 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
| 0 | 1643 } |
| 1644 | |
| 1645 // Give up compiling | |
| 1783 | 1646 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
| 0 | 1647 assert(make_not_entrant, "consistent"); |
| 1783 | 1648 nm->method()->set_not_compilable(CompLevel_full_optimization); |
| 0 | 1649 } |
| 1650 | |
| 1651 } // Free marked resources | |
| 1652 | |
| 1653 } | |
| 1654 JRT_END | |
| 1655 | |
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1656 MethodData* |
| 0 | 1657 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
| 1658 bool create_if_missing) { | |
| 1659 Thread* THREAD = thread; | |
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1660 MethodData* mdo = m()->method_data(); |
| 0 | 1661 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
| 1662 // Build an MDO. Ignore errors like OutOfMemory; | |
| 1663 // that simply means we won't have an MDO to update. | |
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1664 Method::build_interpreter_method_data(m, THREAD); |
| 0 | 1665 if (HAS_PENDING_EXCEPTION) { |
| 1666 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
| 1667 CLEAR_PENDING_EXCEPTION; | |
| 1668 } | |
| 1669 mdo = m()->method_data(); | |
| 1670 } | |
| 1671 return mdo; | |
| 1672 } | |
| 1673 | |
| 1674 ProfileData* | |
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1675 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
| 0 | 1676 int trap_bci, |
| 1677 Deoptimization::DeoptReason reason, | |
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1678 bool update_total_trap_count, |
| 0 | 1679 //outputs: |
| 1680 uint& ret_this_trap_count, | |
| 1681 bool& ret_maybe_prior_trap, | |
| 1682 bool& ret_maybe_prior_recompile) { | |
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1683 bool maybe_prior_trap = false; |
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1684 bool maybe_prior_recompile = false; |
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1685 uint this_trap_count = 0; |
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1686 if (update_total_trap_count) { |
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1687 uint prior_trap_count = trap_mdo->trap_count(reason); |
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1688 this_trap_count = trap_mdo->inc_trap_count(reason); |
| 0 | 1689 |
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1690 // If the runtime cannot find a place to store trap history, |
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1691 // it is estimated based on the general condition of the method. |
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1692 // If the method has ever been recompiled, or has ever incurred |
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1693 // a trap with the present reason , then this BCI is assumed |
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1694 // (pessimistically) to be the culprit. |
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1695 maybe_prior_trap = (prior_trap_count != 0); |
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1696 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1697 } |
| 0 | 1698 |
| 1699 // For reasons which are recorded per bytecode, we check per-BCI data. | |
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1700 ProfileData* pdata = NULL; |
| 0 | 1701 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); |
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1702 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
| 0 | 1703 if (per_bc_reason != Reason_none) { |
| 1704 // Find the profile data for this BCI. If there isn't one, | |
| 1705 // try to allocate one from the MDO's set of spares. | |
| 1706 // This will let us detect a repeated trap at this point. | |
| 1707 pdata = trap_mdo->allocate_bci_to_data(trap_bci); | |
| 1708 | |
| 1709 if (pdata != NULL) { | |
| 1710 // Query the trap state of this profile datum. | |
| 1711 int tstate0 = pdata->trap_state(); | |
| 1712 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
| 1713 maybe_prior_trap = false; | |
| 1714 if (!trap_state_is_recompiled(tstate0)) | |
| 1715 maybe_prior_recompile = false; | |
| 1716 | |
| 1717 // Update the trap state of this profile datum. | |
| 1718 int tstate1 = tstate0; | |
| 1719 // Record the reason. | |
| 1720 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
| 1721 // Store the updated state on the MDO, for next time. | |
| 1722 if (tstate1 != tstate0) | |
| 1723 pdata->set_trap_state(tstate1); | |
| 1724 } else { | |
|
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1725 if (LogCompilation && xtty != NULL) { |
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1726 ttyLocker ttyl; |
| 0 | 1727 // Missing MDP? Leave a small complaint in the log. |
| 1728 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1729 } |
| 0 | 1730 } |
| 1731 } | |
| 1732 | |
| 1733 // Return results: | |
| 1734 ret_this_trap_count = this_trap_count; | |
| 1735 ret_maybe_prior_trap = maybe_prior_trap; | |
| 1736 ret_maybe_prior_recompile = maybe_prior_recompile; | |
| 1737 return pdata; | |
| 1738 } | |
| 1739 | |
| 1740 void | |
|
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1741 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 0 | 1742 ResourceMark rm; |
| 1743 // Ignored outputs: | |
| 1744 uint ignore_this_trap_count; | |
| 1745 bool ignore_maybe_prior_trap; | |
| 1746 bool ignore_maybe_prior_recompile; | |
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1747 // Graal uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
| 5130 | 1748 bool update_total_counts = GRAAL_ONLY(false) NOT_GRAAL(true); |
| 0 | 1749 query_update_method_data(trap_mdo, trap_bci, |
| 1750 (DeoptReason)reason, | |
|
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1751 update_total_counts, |
| 0 | 1752 ignore_this_trap_count, |
| 1753 ignore_maybe_prior_trap, | |
| 1754 ignore_maybe_prior_recompile); | |
| 1755 } | |
| 1756 | |
| 1757 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request) { | |
|
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1758 if (TraceDeoptimization) { |
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1759 tty->print("Uncommon trap "); |
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1760 } |
| 0 | 1761 // Still in Java no safepoints |
| 1762 { | |
| 1763 // This enters VM and may safepoint | |
| 1764 uncommon_trap_inner(thread, trap_request); | |
| 1765 } | |
| 1766 return fetch_unroll_info_helper(thread); | |
| 1767 } | |
| 1768 | |
| 1769 // Local derived constants. | |
| 1770 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
| 1771 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
| 1772 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
| 1773 | |
| 1774 //---------------------------trap_state_reason--------------------------------- | |
| 1775 Deoptimization::DeoptReason | |
| 1776 Deoptimization::trap_state_reason(int trap_state) { | |
| 1777 // This assert provides the link between the width of DataLayout::trap_bits | |
| 1778 // and the encoding of "recorded" reasons. It ensures there are enough | |
| 1779 // bits to store all needed reasons in the per-BCI MDO profile. | |
| 1780 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
| 1781 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 1782 trap_state -= recompile_bit; | |
| 1783 if (trap_state == DS_REASON_MASK) { | |
| 1784 return Reason_many; | |
| 1785 } else { | |
| 1786 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
| 1787 return (DeoptReason)trap_state; | |
| 1788 } | |
| 1789 } | |
| 1790 //-------------------------trap_state_has_reason------------------------------- | |
| 1791 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
| 1792 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
| 1793 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
| 1794 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 1795 trap_state -= recompile_bit; | |
| 1796 if (trap_state == DS_REASON_MASK) { | |
| 1797 return -1; // true, unspecifically (bottom of state lattice) | |
| 1798 } else if (trap_state == reason) { | |
| 1799 return 1; // true, definitely | |
| 1800 } else if (trap_state == 0) { | |
| 1801 return 0; // false, definitely (top of state lattice) | |
| 1802 } else { | |
| 1803 return 0; // false, definitely | |
| 1804 } | |
| 1805 } | |
| 1806 //-------------------------trap_state_add_reason------------------------------- | |
| 1807 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
| 1808 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
| 1809 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 1810 trap_state -= recompile_bit; | |
| 1811 if (trap_state == DS_REASON_MASK) { | |
| 1812 return trap_state + recompile_bit; // already at state lattice bottom | |
| 1813 } else if (trap_state == reason) { | |
| 1814 return trap_state + recompile_bit; // the condition is already true | |
| 1815 } else if (trap_state == 0) { | |
| 1816 return reason + recompile_bit; // no condition has yet been true | |
| 1817 } else { | |
| 1818 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
| 1819 } | |
| 1820 } | |
| 1821 //-----------------------trap_state_is_recompiled------------------------------ | |
| 1822 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
| 1823 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
| 1824 } | |
| 1825 //-----------------------trap_state_set_recompiled----------------------------- | |
| 1826 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
| 1827 if (z) return trap_state | DS_RECOMPILE_BIT; | |
| 1828 else return trap_state & ~DS_RECOMPILE_BIT; | |
| 1829 } | |
| 1830 //---------------------------format_trap_state--------------------------------- | |
| 1831 // This is used for debugging and diagnostics, including hotspot.log output. | |
| 1832 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
| 1833 int trap_state) { | |
| 1834 DeoptReason reason = trap_state_reason(trap_state); | |
| 1835 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
| 1836 // Re-encode the state from its decoded components. | |
| 1837 int decoded_state = 0; | |
| 1838 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
| 1839 decoded_state = trap_state_add_reason(decoded_state, reason); | |
| 1840 if (recomp_flag) | |
| 1841 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
| 1842 // If the state re-encodes properly, format it symbolically. | |
| 1843 // Because this routine is used for debugging and diagnostics, | |
| 1844 // be robust even if the state is a strange value. | |
| 1845 size_t len; | |
| 1846 if (decoded_state != trap_state) { | |
| 1847 // Random buggy state that doesn't decode?? | |
| 1848 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
| 1849 } else { | |
| 1850 len = jio_snprintf(buf, buflen, "%s%s", | |
| 1851 trap_reason_name(reason), | |
| 1852 recomp_flag ? " recompiled" : ""); | |
| 1853 } | |
| 1854 if (len >= buflen) | |
| 1855 buf[buflen-1] = '\0'; | |
| 1856 return buf; | |
| 1857 } | |
| 1858 | |
| 1859 | |
| 1860 //--------------------------------statics-------------------------------------- | |
| 1861 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
| 1862 = Deoptimization::Action_reinterpret; | |
| 1863 const char* Deoptimization::_trap_reason_name[Reason_LIMIT] = { | |
| 1864 // Note: Keep this in sync. with enum DeoptReason. | |
| 1865 "none", | |
| 1866 "null_check", | |
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1867 "null_assert" GRAAL_ONLY("|unreached0"), |
| 0 | 1868 "range_check", |
| 1869 "class_check", | |
| 1870 "array_check", | |
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1871 "intrinsic" GRAAL_ONLY("|type_checked_inlining"), |
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1872 "bimorphic" GRAAL_ONLY("|optimized_type_check"), |
| 0 | 1873 "unloaded", |
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1874 "uninitialized" GRAAL_ONLY("|unresolved"), |
| 0 | 1875 "unreached", |
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1876 "unhandled" GRAAL_ONLY("|not_compiled_exception_handler"), |
| 0 | 1877 "constraint", |
| 1878 "div0_check", | |
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1879 "age" GRAAL_ONLY("|jsr_mismatch"), |
| 3345 | 1880 "predicate", |
| 1881 "loop_limit_check" | |
| 0 | 1882 }; |
| 1883 const char* Deoptimization::_trap_action_name[Action_LIMIT] = { | |
| 1884 // Note: Keep this in sync. with enum DeoptAction. | |
| 1885 "none", | |
| 1886 "maybe_recompile", | |
| 1887 "reinterpret", | |
| 1888 "make_not_entrant", | |
| 1889 "make_not_compilable" | |
| 1890 }; | |
| 1891 | |
| 1892 const char* Deoptimization::trap_reason_name(int reason) { | |
| 1893 if (reason == Reason_many) return "many"; | |
| 1894 if ((uint)reason < Reason_LIMIT) | |
| 1895 return _trap_reason_name[reason]; | |
| 1896 static char buf[20]; | |
| 1897 sprintf(buf, "reason%d", reason); | |
| 1898 return buf; | |
| 1899 } | |
| 1900 const char* Deoptimization::trap_action_name(int action) { | |
| 1901 if ((uint)action < Action_LIMIT) | |
| 1902 return _trap_action_name[action]; | |
| 1903 static char buf[20]; | |
| 1904 sprintf(buf, "action%d", action); | |
| 1905 return buf; | |
| 1906 } | |
| 1907 | |
| 1908 // This is used for debugging and diagnostics, including hotspot.log output. | |
| 1909 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, | |
| 1910 int trap_request) { | |
| 1911 jint unloaded_class_index = trap_request_index(trap_request); | |
| 1912 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
| 1913 const char* action = trap_action_name(trap_request_action(trap_request)); | |
| 1914 size_t len; | |
| 1915 if (unloaded_class_index < 0) { | |
| 1916 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'", | |
| 1917 reason, action); | |
| 1918 } else { | |
| 1919 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'", | |
| 1920 reason, action, unloaded_class_index); | |
| 1921 } | |
| 1922 if (len >= buflen) | |
| 1923 buf[buflen-1] = '\0'; | |
| 1924 return buf; | |
| 1925 } | |
| 1926 | |
| 1927 juint Deoptimization::_deoptimization_hist | |
| 1928 [Deoptimization::Reason_LIMIT] | |
| 1929 [1 + Deoptimization::Action_LIMIT] | |
| 1930 [Deoptimization::BC_CASE_LIMIT] | |
| 1931 = {0}; | |
| 1932 | |
| 1933 enum { | |
| 1934 LSB_BITS = 8, | |
| 1935 LSB_MASK = right_n_bits(LSB_BITS) | |
| 1936 }; | |
| 1937 | |
| 1938 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
| 1939 Bytecodes::Code bc) { | |
| 1940 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
| 1941 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
| 1942 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
| 1943 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
| 1944 juint* cases = _deoptimization_hist[reason][1+action]; | |
| 1945 juint* bc_counter_addr = NULL; | |
| 1946 juint bc_counter = 0; | |
| 1947 // Look for an unused counter, or an exact match to this BC. | |
| 1948 if (bc != Bytecodes::_illegal) { | |
| 1949 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
| 1950 juint* counter_addr = &cases[bc_case]; | |
| 1951 juint counter = *counter_addr; | |
| 1952 if ((counter == 0 && bc_counter_addr == NULL) | |
| 1953 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
| 1954 // this counter is either free or is already devoted to this BC | |
| 1955 bc_counter_addr = counter_addr; | |
| 1956 bc_counter = counter | bc; | |
| 1957 } | |
| 1958 } | |
| 1959 } | |
| 1960 if (bc_counter_addr == NULL) { | |
| 1961 // Overflow, or no given bytecode. | |
| 1962 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
| 1963 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
| 1964 } | |
| 1965 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
| 1966 } | |
| 1967 | |
| 1968 jint Deoptimization::total_deoptimization_count() { | |
| 1969 return _deoptimization_hist[Reason_none][0][0]; | |
| 1970 } | |
| 1971 | |
| 1972 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
| 1973 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
| 1974 return _deoptimization_hist[reason][0][0]; | |
| 1975 } | |
| 1976 | |
| 1977 void Deoptimization::print_statistics() { | |
| 1978 juint total = total_deoptimization_count(); | |
| 1979 juint account = total; | |
| 1980 if (total != 0) { | |
| 1981 ttyLocker ttyl; | |
| 1982 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
| 1983 tty->print_cr("Deoptimization traps recorded:"); | |
| 1984 #define PRINT_STAT_LINE(name, r) \ | |
| 1985 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
| 1986 PRINT_STAT_LINE("total", total); | |
| 1987 // For each non-zero entry in the histogram, print the reason, | |
| 1988 // the action, and (if specifically known) the type of bytecode. | |
| 1989 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
| 1990 for (int action = 0; action < Action_LIMIT; action++) { | |
| 1991 juint* cases = _deoptimization_hist[reason][1+action]; | |
| 1992 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
| 1993 juint counter = cases[bc_case]; | |
| 1994 if (counter != 0) { | |
| 1995 char name[1*K]; | |
| 1996 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
| 1997 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
| 1998 bc = Bytecodes::_illegal; | |
| 1999 sprintf(name, "%s/%s/%s", | |
| 2000 trap_reason_name(reason), | |
| 2001 trap_action_name(action), | |
| 2002 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
| 2003 juint r = counter >> LSB_BITS; | |
| 2004 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
| 2005 account -= r; | |
| 2006 } | |
| 2007 } | |
| 2008 } | |
| 2009 } | |
| 2010 if (account != 0) { | |
| 2011 PRINT_STAT_LINE("unaccounted", account); | |
| 2012 } | |
| 2013 #undef PRINT_STAT_LINE | |
| 2014 if (xtty != NULL) xtty->tail("statistics"); | |
| 2015 } | |
| 2016 } | |
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2017 #else // COMPILER2 || SHARK || GRAAL |
| 0 | 2018 |
| 2019 | |
| 2020 // Stubs for C1 only system. | |
| 2021 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
| 2022 return false; | |
| 2023 } | |
| 2024 | |
| 2025 const char* Deoptimization::trap_reason_name(int reason) { | |
| 2026 return "unknown"; | |
| 2027 } | |
| 2028 | |
| 2029 void Deoptimization::print_statistics() { | |
| 2030 // no output | |
| 2031 } | |
| 2032 | |
| 2033 void | |
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2034 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 0 | 2035 // no udpate |
| 2036 } | |
| 2037 | |
| 2038 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
| 2039 return 0; | |
| 2040 } | |
| 2041 | |
| 2042 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
| 2043 Bytecodes::Code bc) { | |
| 2044 // no update | |
| 2045 } | |
| 2046 | |
| 2047 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
| 2048 int trap_state) { | |
| 2049 jio_snprintf(buf, buflen, "#%d", trap_state); | |
| 2050 return buf; | |
| 2051 } | |
| 2052 | |
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2053 #endif // COMPILER2 || SHARK || GRAAL |