Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/deoptimization.cpp @ 22712:3c1edc9c60d8
Let fetch_unroll_info override the exec_mode and handle rethrowing scopes
Scopes with rethrow_exception set to true need to be handled
for all types of deoptimization, not just for uncommon traps.
This change moves their handling from uncommon_trap_inner to
fetch_unroll_info_helper and uses exception_oop and exec_mode
Unpack_exception rather than setting a pending execption.
fetch_unroll_info_helper can now override the exec_mode by
passing it through the UnrollBlock.
| author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
|---|---|
| date | Thu, 29 Oct 2015 16:11:45 +0100 |
| parents | 6832e10a0b97 |
| children | ba7846fcb814 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "code/debugInfoRec.hpp" | |
| 28 #include "code/nmethod.hpp" | |
| 29 #include "code/pcDesc.hpp" | |
| 30 #include "code/scopeDesc.hpp" | |
| 31 #include "interpreter/bytecode.hpp" | |
| 32 #include "interpreter/interpreter.hpp" | |
| 33 #include "interpreter/oopMapCache.hpp" | |
| 34 #include "memory/allocation.inline.hpp" | |
| 35 #include "memory/oopFactory.hpp" | |
| 36 #include "memory/resourceArea.hpp" | |
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37 #include "oops/method.hpp" |
| 1972 | 38 #include "oops/oop.inline.hpp" |
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39 #include "oops/fieldStreams.hpp" |
| 1972 | 40 #include "prims/jvmtiThreadState.hpp" |
| 41 #include "runtime/biasedLocking.hpp" | |
| 42 #include "runtime/compilationPolicy.hpp" | |
| 43 #include "runtime/deoptimization.hpp" | |
| 44 #include "runtime/interfaceSupport.hpp" | |
| 45 #include "runtime/sharedRuntime.hpp" | |
| 46 #include "runtime/signature.hpp" | |
| 47 #include "runtime/stubRoutines.hpp" | |
| 48 #include "runtime/thread.hpp" | |
| 49 #include "runtime/vframe.hpp" | |
| 50 #include "runtime/vframeArray.hpp" | |
| 51 #include "runtime/vframe_hp.hpp" | |
| 52 #include "utilities/events.hpp" | |
| 53 #include "utilities/xmlstream.hpp" | |
| 54 #ifdef TARGET_ARCH_x86 | |
| 55 # include "vmreg_x86.inline.hpp" | |
| 56 #endif | |
| 57 #ifdef TARGET_ARCH_sparc | |
| 58 # include "vmreg_sparc.inline.hpp" | |
| 59 #endif | |
| 60 #ifdef TARGET_ARCH_zero | |
| 61 # include "vmreg_zero.inline.hpp" | |
| 62 #endif | |
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63 #ifdef TARGET_ARCH_arm |
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64 # include "vmreg_arm.inline.hpp" |
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65 #endif |
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66 #ifdef TARGET_ARCH_ppc |
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67 # include "vmreg_ppc.inline.hpp" |
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68 #endif |
| 1972 | 69 #ifdef COMPILER2 |
| 70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
| 71 # include "adfiles/ad_x86_32.hpp" | |
| 72 #endif | |
| 73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
| 74 # include "adfiles/ad_x86_64.hpp" | |
| 75 #endif | |
| 76 #ifdef TARGET_ARCH_MODEL_sparc | |
| 77 # include "adfiles/ad_sparc.hpp" | |
| 78 #endif | |
| 79 #ifdef TARGET_ARCH_MODEL_zero | |
| 80 # include "adfiles/ad_zero.hpp" | |
| 81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
| 14391 | 85 #ifdef TARGET_ARCH_MODEL_ppc_32 |
| 86 # include "adfiles/ad_ppc_32.hpp" | |
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87 #endif |
| 14391 | 88 #ifdef TARGET_ARCH_MODEL_ppc_64 |
| 89 # include "adfiles/ad_ppc_64.hpp" | |
| 1972 | 90 #endif |
| 14391 | 91 #endif // COMPILER2 |
| 0 | 92 |
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93 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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94 |
| 22298 | 95 #if INCLUDE_JVMCI |
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96 #include "jvmci/jvmciRuntime.hpp" |
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97 #include "jvmci/jvmciJavaClasses.hpp" |
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98 #endif |
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99 |
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100 |
| 0 | 101 bool DeoptimizationMarker::_is_active = false; |
| 102 | |
| 103 Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, | |
| 104 int caller_adjustment, | |
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105 int caller_actual_parameters, |
| 0 | 106 int number_of_frames, |
| 107 intptr_t* frame_sizes, | |
| 108 address* frame_pcs, | |
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109 BasicType return_type, |
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110 int exec_mode) { |
| 0 | 111 _size_of_deoptimized_frame = size_of_deoptimized_frame; |
| 112 _caller_adjustment = caller_adjustment; | |
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113 _caller_actual_parameters = caller_actual_parameters; |
| 0 | 114 _number_of_frames = number_of_frames; |
| 115 _frame_sizes = frame_sizes; | |
| 116 _frame_pcs = frame_pcs; | |
| 6197 | 117 _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler); |
| 0 | 118 _return_type = return_type; |
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119 _initial_info = 0; |
| 0 | 120 // PD (x86 only) |
| 121 _counter_temp = 0; | |
| 122 _unpack_kind = 0; | |
| 123 _sender_sp_temp = 0; | |
| 124 | |
| 125 _total_frame_sizes = size_of_frames(); | |
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126 assert(exec_mode >= 0 && exec_mode < Unpack_LIMIT, "Unexpected exec_mode"); |
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127 _exec_mode = exec_mode; |
| 0 | 128 } |
| 129 | |
| 130 | |
| 131 Deoptimization::UnrollBlock::~UnrollBlock() { | |
| 6197 | 132 FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes, mtCompiler); |
| 133 FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs, mtCompiler); | |
| 134 FREE_C_HEAP_ARRAY(intptr_t, _register_block, mtCompiler); | |
| 0 | 135 } |
| 136 | |
| 137 | |
| 138 intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { | |
| 139 assert(register_number < RegisterMap::reg_count, "checking register number"); | |
| 140 return &_register_block[register_number * 2]; | |
| 141 } | |
| 142 | |
| 143 | |
| 144 | |
| 145 int Deoptimization::UnrollBlock::size_of_frames() const { | |
| 146 // Acount first for the adjustment of the initial frame | |
| 147 int result = _caller_adjustment; | |
| 148 for (int index = 0; index < number_of_frames(); index++) { | |
| 149 result += frame_sizes()[index]; | |
| 150 } | |
| 151 return result; | |
| 152 } | |
| 153 | |
| 154 | |
| 155 void Deoptimization::UnrollBlock::print() { | |
| 156 ttyLocker ttyl; | |
| 157 tty->print_cr("UnrollBlock"); | |
| 158 tty->print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); | |
| 159 tty->print( " frame_sizes: "); | |
| 160 for (int index = 0; index < number_of_frames(); index++) { | |
| 161 tty->print("%d ", frame_sizes()[index]); | |
| 162 } | |
| 163 tty->cr(); | |
| 164 } | |
| 165 | |
| 166 | |
| 167 // In order to make fetch_unroll_info work properly with escape | |
| 168 // analysis, The method was changed from JRT_LEAF to JRT_BLOCK_ENTRY and | |
| 169 // ResetNoHandleMark and HandleMark were removed from it. The actual reallocation | |
| 170 // of previously eliminated objects occurs in realloc_objects, which is | |
| 171 // called from the method fetch_unroll_info_helper below. | |
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172 JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* thread, int exec_mode)) |
| 0 | 173 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, |
| 174 // but makes the entry a little slower. There is however a little dance we have to | |
| 175 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
| 176 | |
| 177 // fetch_unroll_info() is called at the beginning of the deoptimization | |
| 178 // handler. Note this fact before we start generating temporary frames | |
| 179 // that can confuse an asynchronous stack walker. This counter is | |
| 180 // decremented at the end of unpack_frames(). | |
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181 if (TraceDeoptimization) { |
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182 tty->print_cr("Deoptimizing thread " INTPTR_FORMAT, thread); |
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183 } |
| 0 | 184 thread->inc_in_deopt_handler(); |
| 185 | |
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186 return fetch_unroll_info_helper(thread, exec_mode); |
| 0 | 187 JRT_END |
| 188 | |
| 189 | |
| 190 // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) | |
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191 Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* thread, int exec_mode) { |
| 0 | 192 |
| 193 // Note: there is a safepoint safety issue here. No matter whether we enter | |
| 194 // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once | |
| 195 // the vframeArray is created. | |
| 196 // | |
| 197 | |
| 198 // Allocate our special deoptimization ResourceMark | |
| 199 DeoptResourceMark* dmark = new DeoptResourceMark(thread); | |
| 200 assert(thread->deopt_mark() == NULL, "Pending deopt!"); | |
| 201 thread->set_deopt_mark(dmark); | |
| 202 | |
| 203 frame stub_frame = thread->last_frame(); // Makes stack walkable as side effect | |
| 204 RegisterMap map(thread, true); | |
| 205 RegisterMap dummy_map(thread, false); | |
| 206 // Now get the deoptee with a valid map | |
| 207 frame deoptee = stub_frame.sender(&map); | |
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208 // Set the deoptee nmethod |
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209 assert(thread->deopt_nmethod() == NULL, "Pending deopt!"); |
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210 thread->set_deopt_nmethod(deoptee.cb()->as_nmethod_or_null()); |
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211 bool skip_internal = thread->deopt_nmethod() != NULL && !thread->deopt_nmethod()->compiler()->is_jvmci(); |
| 0 | 212 |
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213 if (VerifyStack) { |
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214 thread->validate_frame_layout(); |
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215 } |
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216 |
| 0 | 217 // Create a growable array of VFrames where each VFrame represents an inlined |
| 218 // Java frame. This storage is allocated with the usual system arena. | |
| 219 assert(deoptee.is_compiled_frame(), "Wrong frame type"); | |
| 220 GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); | |
| 221 vframe* vf = vframe::new_vframe(&deoptee, &map, thread); | |
| 222 while (!vf->is_top()) { | |
| 223 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
| 224 chunk->push(compiledVFrame::cast(vf)); | |
| 225 vf = vf->sender(); | |
| 226 } | |
| 227 assert(vf->is_compiled_frame(), "Wrong frame type"); | |
| 228 chunk->push(compiledVFrame::cast(vf)); | |
| 229 | |
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230 #ifdef INCLUDE_JVMCI |
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231 ScopeDesc* trap_scope = chunk->at(0)->scope(); |
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232 Handle exceptionObject; |
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233 if (trap_scope->rethrow_exception()) { |
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234 if (PrintDeoptimizationDetails) { |
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235 tty->print_cr("Exception to be rethrown in the interpreter for method %s::%s at bci %d", trap_scope->method()->method_holder()->name()->as_C_string(), trap_scope->method()->name()->as_C_string(), trap_scope->bci()); |
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236 } |
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237 GrowableArray<ScopeValue*>* expressions = trap_scope->expressions(); |
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238 guarantee(expressions != NULL && expressions->length() > 0, "must have exception to throw"); |
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239 ScopeValue* topOfStack = expressions->top(); |
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240 exceptionObject = StackValue::create_stack_value(&deoptee, &map, topOfStack)->get_obj(); |
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241 assert(exceptionObject() != NULL, "exception oop can not be null"); |
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242 } |
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243 #endif |
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244 |
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245 bool realloc_failures = false; |
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246 |
| 22298 | 247 #if defined(COMPILER2) || INCLUDE_JVMCI |
| 0 | 248 // Reallocate the non-escaping objects and restore their fields. Then |
| 249 // relock objects if synchronization on them was eliminated. | |
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250 #ifndef INCLUDE_JVMCI |
| 4777 | 251 if (DoEscapeAnalysis || EliminateNestedLocks) { |
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252 if (EliminateAllocations) { |
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253 #endif // INCLUDE_JVMCI |
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254 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); |
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255 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
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256 |
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257 // The flag return_oop() indicates call sites which return oop |
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258 // in compiled code. Such sites include java method calls, |
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259 // runtime calls (for example, used to allocate new objects/arrays |
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260 // on slow code path) and any other calls generated in compiled code. |
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261 // It is not guaranteed that we can get such information here only |
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262 // by analyzing bytecode in deoptimized frames. This is why this flag |
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263 // is set during method compilation (see Compile::Process_OopMap_Node()). |
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264 // If the previous frame was popped, we don't have a result. |
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265 bool save_oop_result = chunk->at(0)->scope()->return_oop() && !thread->popframe_forcing_deopt_reexecution(); |
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266 Handle return_value; |
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267 if (save_oop_result) { |
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268 // Reallocation may trigger GC. If deoptimization happened on return from |
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269 // call which returns oop we need to save it since it is not in oopmap. |
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270 oop result = deoptee.saved_oop_result(&map); |
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271 assert(result == NULL || result->is_oop(), "must be oop"); |
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272 return_value = Handle(thread, result); |
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273 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer"); |
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274 if (TraceDeoptimization) { |
| 6843 | 275 ttyLocker ttyl; |
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276 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, (void *)result, thread); |
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277 } |
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278 } |
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279 if (objects != NULL) { |
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280 JRT_BLOCK |
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281 realloc_failures = realloc_objects(thread, &deoptee, objects, THREAD); |
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282 JRT_END |
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283 reassign_fields(&deoptee, &map, objects, realloc_failures, skip_internal); |
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284 #ifndef PRODUCT |
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285 if (TraceDeoptimization) { |
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286 ttyLocker ttyl; |
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287 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); |
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288 print_objects(objects, realloc_failures); |
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289 } |
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290 #endif |
| 0 | 291 } |
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292 if (save_oop_result) { |
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293 // Restore result. |
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294 deoptee.set_saved_oop_result(&map, return_value()); |
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295 } |
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296 #ifndef INCLUDE_JVMCI |
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297 } |
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298 if (EliminateLocks) { |
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299 #endif // INCLUDE_JVMCI |
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300 #ifndef PRODUCT |
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301 bool first = true; |
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302 #endif |
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303 for (int i = 0; i < chunk->length(); i++) { |
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304 compiledVFrame* cvf = chunk->at(i); |
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305 assert (cvf->scope() != NULL,"expect only compiled java frames"); |
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306 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
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307 if (monitors->is_nonempty()) { |
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308 relock_objects(monitors, thread, realloc_failures); |
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309 #ifndef PRODUCT |
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310 if (PrintDeoptimizationDetails) { |
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311 ttyLocker ttyl; |
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312 for (int j = 0; j < monitors->length(); j++) { |
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313 MonitorInfo* mi = monitors->at(j); |
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314 if (mi->eliminated()) { |
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315 if (first) { |
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316 first = false; |
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317 tty->print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT, thread); |
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318 } |
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319 if (mi->owner_is_scalar_replaced()) { |
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320 Klass* k = java_lang_Class::as_Klass(mi->owner_klass()); |
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321 tty->print_cr(" failed reallocation for klass %s", k->external_name()); |
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322 } else { |
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323 tty->print_cr(" object <" INTPTR_FORMAT "> locked", (void *)mi->owner()); |
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324 } |
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325 } |
| 0 | 326 } |
| 327 } | |
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328 #endif |
| 0 | 329 } |
| 330 } | |
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331 #ifndef INCLUDE_JVMCI |
| 0 | 332 } |
| 333 } | |
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334 #endif // INCLUDE_JVMCI |
| 22298 | 335 #endif // COMPILER2 || INCLUDE_JVMCI |
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336 |
| 0 | 337 // Ensure that no safepoint is taken after pointers have been stored |
| 338 // in fields of rematerialized objects. If a safepoint occurs from here on | |
| 339 // out the java state residing in the vframeArray will be missed. | |
| 340 No_Safepoint_Verifier no_safepoint; | |
| 341 | |
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342 vframeArray* array = create_vframeArray(thread, deoptee, &map, chunk, realloc_failures); |
| 22298 | 343 #if defined(COMPILER2) || INCLUDE_JVMCI |
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344 if (realloc_failures) { |
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345 pop_frames_failed_reallocs(thread, array); |
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346 } |
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347 #endif |
| 0 | 348 |
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349 assert(thread->vframe_array_head() == NULL, "Pending deopt!"); |
| 0 | 350 thread->set_vframe_array_head(array); |
| 351 | |
| 352 // Now that the vframeArray has been created if we have any deferred local writes | |
| 353 // added by jvmti then we can free up that structure as the data is now in the | |
| 354 // vframeArray | |
| 355 | |
| 356 if (thread->deferred_locals() != NULL) { | |
| 357 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread->deferred_locals(); | |
| 358 int i = 0; | |
| 359 do { | |
| 360 // Because of inlining we could have multiple vframes for a single frame | |
| 361 // and several of the vframes could have deferred writes. Find them all. | |
| 362 if (list->at(i)->id() == array->original().id()) { | |
| 363 jvmtiDeferredLocalVariableSet* dlv = list->at(i); | |
| 364 list->remove_at(i); | |
| 365 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
| 366 delete dlv; | |
| 367 } else { | |
| 368 i++; | |
| 369 } | |
| 370 } while ( i < list->length() ); | |
| 371 if (list->length() == 0) { | |
| 372 thread->set_deferred_locals(NULL); | |
| 373 // free the list and elements back to C heap. | |
| 374 delete list; | |
| 375 } | |
| 376 | |
| 377 } | |
| 378 | |
| 1692 | 379 #ifndef SHARK |
| 0 | 380 // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
| 381 CodeBlob* cb = stub_frame.cb(); | |
| 382 // Verify we have the right vframeArray | |
| 383 assert(cb->frame_size() >= 0, "Unexpected frame size"); | |
| 384 intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); | |
| 385 | |
| 1204 | 386 // If the deopt call site is a MethodHandle invoke call site we have |
| 387 // to adjust the unpack_sp. | |
| 388 nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); | |
| 389 if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc())) | |
| 390 unpack_sp = deoptee.unextended_sp(); | |
| 391 | |
| 0 | 392 #ifdef ASSERT |
| 15104 | 393 assert(cb->is_deoptimization_stub() || |
| 394 cb->is_uncommon_trap_stub() || | |
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395 strcmp("Stub<DeoptimizationStub.deoptimizationHandler>", cb->name()) == 0 || |
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396 strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>", cb->name()) == 0, |
| 15104 | 397 err_msg("unexpected code blob: %s", cb->name())); |
| 0 | 398 #endif |
| 1692 | 399 #else |
| 400 intptr_t* unpack_sp = stub_frame.sender(&dummy_map).unextended_sp(); | |
| 401 #endif // !SHARK | |
| 402 | |
| 0 | 403 // This is a guarantee instead of an assert because if vframe doesn't match |
| 404 // we will unpack the wrong deoptimized frame and wind up in strange places | |
| 405 // where it will be very difficult to figure out what went wrong. Better | |
| 406 // to die an early death here than some very obscure death later when the | |
| 407 // trail is cold. | |
| 408 // Note: on ia64 this guarantee can be fooled by frames with no memory stack | |
| 409 // in that it will fail to detect a problem when there is one. This needs | |
| 410 // more work in tiger timeframe. | |
| 411 guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack"); | |
| 412 | |
| 413 int number_of_frames = array->frames(); | |
| 414 | |
| 415 // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost | |
| 416 // virtual activation, which is the reverse of the elements in the vframes array. | |
| 6197 | 417 intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler); |
| 0 | 418 // +1 because we always have an interpreter return address for the final slot. |
| 6197 | 419 address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler); |
| 0 | 420 int popframe_extra_args = 0; |
| 421 // Create an interpreter return address for the stub to use as its return | |
| 422 // address so the skeletal frames are perfectly walkable | |
| 423 frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); | |
| 424 | |
| 425 // PopFrame requires that the preserved incoming arguments from the recently-popped topmost | |
| 426 // activation be put back on the expression stack of the caller for reexecution | |
| 427 if (JvmtiExport::can_pop_frame() && thread->popframe_forcing_deopt_reexecution()) { | |
| 428 popframe_extra_args = in_words(thread->popframe_preserved_args_size_in_words()); | |
| 429 } | |
| 430 | |
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431 // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
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432 // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
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433 // than simply use array->sender.pc(). This requires us to walk the current set of frames |
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434 // |
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435 frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
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436 deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
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437 |
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438 // It's possible that the number of paramters at the call site is |
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439 // different than number of arguments in the callee when method |
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440 // handles are used. If the caller is interpreted get the real |
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441 // value so that the proper amount of space can be added to it's |
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442 // frame. |
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443 bool caller_was_method_handle = false; |
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444 if (deopt_sender.is_interpreted_frame()) { |
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445 methodHandle method = deopt_sender.interpreter_frame_method(); |
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446 Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
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447 if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
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448 // Method handle invokes may involve fairly arbitrary chains of |
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449 // calls so it's impossible to know how much actual space the |
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450 // caller has for locals. |
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451 caller_was_method_handle = true; |
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452 } |
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453 } |
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454 |
| 0 | 455 // |
| 456 // frame_sizes/frame_pcs[0] oldest frame (int or c2i) | |
| 457 // frame_sizes/frame_pcs[1] next oldest frame (int) | |
| 458 // frame_sizes/frame_pcs[n] youngest frame (int) | |
| 459 // | |
| 460 // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame | |
| 461 // owns the space for the return address to it's caller). Confusing ain't it. | |
| 462 // | |
| 463 // The vframe array can address vframes with indices running from | |
| 464 // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. | |
| 465 // When we create the skeletal frames we need the oldest frame to be in the zero slot | |
| 466 // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. | |
| 467 // so things look a little strange in this loop. | |
| 468 // | |
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469 int callee_parameters = 0; |
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470 int callee_locals = 0; |
| 0 | 471 for (int index = 0; index < array->frames(); index++ ) { |
| 472 // frame[number_of_frames - 1 ] = on_stack_size(youngest) | |
| 473 // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) | |
| 474 // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) | |
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475 frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(callee_parameters, |
| 0 | 476 callee_locals, |
| 477 index == 0, | |
| 478 popframe_extra_args); | |
| 479 // This pc doesn't have to be perfect just good enough to identify the frame | |
| 480 // as interpreted so the skeleton frame will be walkable | |
| 481 // The correct pc will be set when the skeleton frame is completely filled out | |
| 482 // The final pc we store in the loop is wrong and will be overwritten below | |
| 483 frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; | |
| 484 | |
| 485 callee_parameters = array->element(index)->method()->size_of_parameters(); | |
| 486 callee_locals = array->element(index)->method()->max_locals(); | |
| 487 popframe_extra_args = 0; | |
| 488 } | |
| 489 | |
| 490 // Compute whether the root vframe returns a float or double value. | |
| 491 BasicType return_type; | |
| 492 { | |
| 493 HandleMark hm; | |
| 494 methodHandle method(thread, array->element(0)->method()); | |
| 2142 | 495 Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
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496 return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
| 0 | 497 } |
| 498 | |
| 499 // Compute information for handling adapters and adjusting the frame size of the caller. | |
| 500 int caller_adjustment = 0; | |
| 501 | |
| 502 // Compute the amount the oldest interpreter frame will have to adjust | |
| 503 // its caller's stack by. If the caller is a compiled frame then | |
| 504 // we pretend that the callee has no parameters so that the | |
| 505 // extension counts for the full amount of locals and not just | |
| 506 // locals-parms. This is because without a c2i adapter the parm | |
| 507 // area as created by the compiled frame will not be usable by | |
| 508 // the interpreter. (Depending on the calling convention there | |
| 509 // may not even be enough space). | |
| 510 | |
| 511 // QQQ I'd rather see this pushed down into last_frame_adjust | |
| 512 // and have it take the sender (aka caller). | |
| 513 | |
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514 if (deopt_sender.is_compiled_frame() || caller_was_method_handle) { |
| 0 | 515 caller_adjustment = last_frame_adjust(0, callee_locals); |
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516 } else if (callee_locals > callee_parameters) { |
| 0 | 517 // The caller frame may need extending to accommodate |
| 518 // non-parameter locals of the first unpacked interpreted frame. | |
| 519 // Compute that adjustment. | |
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520 caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
| 0 | 521 } |
| 522 | |
| 523 // If the sender is deoptimized the we must retrieve the address of the handler | |
| 524 // since the frame will "magically" show the original pc before the deopt | |
| 525 // and we'd undo the deopt. | |
| 526 | |
| 527 frame_pcs[0] = deopt_sender.raw_pc(); | |
| 528 | |
| 1692 | 529 #ifndef SHARK |
| 0 | 530 assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc"); |
| 1692 | 531 #endif // SHARK |
| 0 | 532 |
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533 #ifdef INCLUDE_JVMCI |
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534 if (exceptionObject() != NULL) { |
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535 thread->set_exception_oop(exceptionObject()); |
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536 exec_mode = Unpack_exception; |
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537 } |
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538 #endif |
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539 |
| 0 | 540 UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, |
| 541 caller_adjustment * BytesPerWord, | |
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542 caller_was_method_handle ? 0 : callee_parameters, |
| 0 | 543 number_of_frames, |
| 544 frame_sizes, | |
| 545 frame_pcs, | |
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546 return_type, |
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547 exec_mode); |
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548 // On some platforms, we need a way to pass some platform dependent |
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549 // information to the unpacking code so the skeletal frames come out |
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550 // correct (initial fp value, unextended sp, ...) |
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551 info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
| 0 | 552 |
| 553 if (array->frames() > 1) { | |
| 554 if (VerifyStack && TraceDeoptimization) { | |
| 6843 | 555 ttyLocker ttyl; |
| 0 | 556 tty->print_cr("Deoptimizing method containing inlining"); |
| 557 } | |
| 558 } | |
| 559 | |
| 560 array->set_unroll_block(info); | |
| 561 return info; | |
| 562 } | |
| 563 | |
| 564 // Called to cleanup deoptimization data structures in normal case | |
| 565 // after unpacking to stack and when stack overflow error occurs | |
| 566 void Deoptimization::cleanup_deopt_info(JavaThread *thread, | |
| 567 vframeArray *array) { | |
| 568 | |
| 569 // Get array if coming from exception | |
| 570 if (array == NULL) { | |
| 571 array = thread->vframe_array_head(); | |
| 572 } | |
| 573 thread->set_vframe_array_head(NULL); | |
| 574 | |
| 575 // Free the previous UnrollBlock | |
| 576 vframeArray* old_array = thread->vframe_array_last(); | |
| 577 thread->set_vframe_array_last(array); | |
| 578 | |
| 579 if (old_array != NULL) { | |
| 580 UnrollBlock* old_info = old_array->unroll_block(); | |
| 581 old_array->set_unroll_block(NULL); | |
| 582 delete old_info; | |
| 583 delete old_array; | |
| 584 } | |
| 585 | |
| 586 // Deallocate any resource creating in this routine and any ResourceObjs allocated | |
| 587 // inside the vframeArray (StackValueCollections) | |
| 588 | |
| 589 delete thread->deopt_mark(); | |
| 590 thread->set_deopt_mark(NULL); | |
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591 thread->set_deopt_nmethod(NULL); |
| 0 | 592 |
| 593 | |
| 594 if (JvmtiExport::can_pop_frame()) { | |
| 595 #ifndef CC_INTERP | |
| 596 // Regardless of whether we entered this routine with the pending | |
| 597 // popframe condition bit set, we should always clear it now | |
| 598 thread->clear_popframe_condition(); | |
| 599 #else | |
| 600 // C++ interpeter will clear has_pending_popframe when it enters | |
| 601 // with method_resume. For deopt_resume2 we clear it now. | |
| 602 if (thread->popframe_forcing_deopt_reexecution()) | |
| 603 thread->clear_popframe_condition(); | |
| 604 #endif /* CC_INTERP */ | |
| 605 } | |
| 606 | |
| 607 // unpack_frames() is called at the end of the deoptimization handler | |
| 608 // and (in C2) at the end of the uncommon trap handler. Note this fact | |
| 609 // so that an asynchronous stack walker can work again. This counter is | |
| 610 // incremented at the beginning of fetch_unroll_info() and (in C2) at | |
| 611 // the beginning of uncommon_trap(). | |
| 612 thread->dec_in_deopt_handler(); | |
| 613 } | |
| 614 | |
| 615 | |
| 616 // Return BasicType of value being returned | |
| 617 JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode)) | |
| 618 | |
| 619 // We are already active int he special DeoptResourceMark any ResourceObj's we | |
| 620 // allocate will be freed at the end of the routine. | |
| 621 | |
| 622 // It is actually ok to allocate handles in a leaf method. It causes no safepoints, | |
| 623 // but makes the entry a little slower. There is however a little dance we have to | |
| 624 // do in debug mode to get around the NoHandleMark code in the JRT_LEAF macro | |
| 625 ResetNoHandleMark rnhm; // No-op in release/product versions | |
| 626 HandleMark hm; | |
| 627 | |
| 628 frame stub_frame = thread->last_frame(); | |
| 629 | |
| 630 // Since the frame to unpack is the top frame of this thread, the vframe_array_head | |
| 631 // must point to the vframeArray for the unpack frame. | |
| 632 vframeArray* array = thread->vframe_array_head(); | |
| 633 | |
| 634 #ifndef PRODUCT | |
| 635 if (TraceDeoptimization) { | |
| 6843 | 636 ttyLocker ttyl; |
| 0 | 637 tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT " vframeArray " INTPTR_FORMAT " mode %d", thread, array, exec_mode); |
| 638 } | |
| 639 #endif | |
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640 Events::log(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT " mode %d", |
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641 stub_frame.pc(), stub_frame.sp(), exec_mode); |
| 0 | 642 |
| 643 UnrollBlock* info = array->unroll_block(); | |
| 644 | |
| 645 // Unpack the interpreter frames and any adapter frame (c2 only) we might create. | |
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646 array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
| 0 | 647 |
| 648 BasicType bt = info->return_type(); | |
| 649 | |
| 650 // If we have an exception pending, claim that the return type is an oop | |
| 651 // so the deopt_blob does not overwrite the exception_oop. | |
| 652 | |
| 653 if (exec_mode == Unpack_exception) | |
| 654 bt = T_OBJECT; | |
| 655 | |
| 656 // Cleanup thread deopt data | |
| 657 cleanup_deopt_info(thread, array); | |
| 658 | |
| 659 #ifndef PRODUCT | |
| 660 if (VerifyStack) { | |
| 661 ResourceMark res_mark; | |
| 662 | |
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663 thread->validate_frame_layout(); |
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664 |
| 0 | 665 // Verify that the just-unpacked frames match the interpreter's |
| 666 // notions of expression stack and locals | |
| 667 vframeArray* cur_array = thread->vframe_array_last(); | |
| 668 RegisterMap rm(thread, false); | |
| 669 rm.set_include_argument_oops(false); | |
| 670 bool is_top_frame = true; | |
| 671 int callee_size_of_parameters = 0; | |
| 672 int callee_max_locals = 0; | |
| 673 for (int i = 0; i < cur_array->frames(); i++) { | |
| 674 vframeArrayElement* el = cur_array->element(i); | |
| 675 frame* iframe = el->iframe(); | |
| 676 guarantee(iframe->is_interpreted_frame(), "Wrong frame type"); | |
| 677 | |
| 678 // Get the oop map for this bci | |
| 679 InterpreterOopMap mask; | |
| 680 int cur_invoke_parameter_size = 0; | |
| 681 bool try_next_mask = false; | |
| 682 int next_mask_expression_stack_size = -1; | |
| 683 int top_frame_expression_stack_adjustment = 0; | |
| 684 methodHandle mh(thread, iframe->interpreter_frame_method()); | |
| 685 OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); | |
| 686 BytecodeStream str(mh); | |
| 687 str.set_start(iframe->interpreter_frame_bci()); | |
| 688 int max_bci = mh->code_size(); | |
| 689 // Get to the next bytecode if possible | |
| 690 assert(str.bci() < max_bci, "bci in interpreter frame out of bounds"); | |
| 691 // Check to see if we can grab the number of outgoing arguments | |
| 692 // at an uncommon trap for an invoke (where the compiler | |
| 693 // generates debug info before the invoke has executed) | |
| 694 Bytecodes::Code cur_code = str.next(); | |
| 10390 | 695 if (cur_code == Bytecodes::_invokevirtual || |
| 696 cur_code == Bytecodes::_invokespecial || | |
| 697 cur_code == Bytecodes::_invokestatic || | |
| 698 cur_code == Bytecodes::_invokeinterface || | |
| 699 cur_code == Bytecodes::_invokedynamic) { | |
| 2142 | 700 Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
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701 Symbol* signature = invoke.signature(); |
| 0 | 702 ArgumentSizeComputer asc(signature); |
| 703 cur_invoke_parameter_size = asc.size(); | |
| 10390 | 704 if (invoke.has_receiver()) { |
| 0 | 705 // Add in receiver |
| 706 ++cur_invoke_parameter_size; | |
| 707 } | |
| 10390 | 708 if (i != 0 && !invoke.is_invokedynamic() && MethodHandles::has_member_arg(invoke.klass(), invoke.name())) { |
| 709 callee_size_of_parameters++; | |
| 710 } | |
| 0 | 711 } |
| 712 if (str.bci() < max_bci) { | |
| 713 Bytecodes::Code bc = str.next(); | |
| 714 if (bc >= 0) { | |
| 715 // The interpreter oop map generator reports results before | |
| 716 // the current bytecode has executed except in the case of | |
| 717 // calls. It seems to be hard to tell whether the compiler | |
| 718 // has emitted debug information matching the "state before" | |
| 719 // a given bytecode or the state after, so we try both | |
| 720 switch (cur_code) { | |
| 721 case Bytecodes::_invokevirtual: | |
| 722 case Bytecodes::_invokespecial: | |
| 723 case Bytecodes::_invokestatic: | |
| 724 case Bytecodes::_invokeinterface: | |
| 10390 | 725 case Bytecodes::_invokedynamic: |
| 0 | 726 case Bytecodes::_athrow: |
| 727 break; | |
| 728 default: { | |
| 729 InterpreterOopMap next_mask; | |
| 730 OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); | |
| 731 next_mask_expression_stack_size = next_mask.expression_stack_size(); | |
| 732 // Need to subtract off the size of the result type of | |
| 733 // the bytecode because this is not described in the | |
| 734 // debug info but returned to the interpreter in the TOS | |
| 735 // caching register | |
| 736 BasicType bytecode_result_type = Bytecodes::result_type(cur_code); | |
| 737 if (bytecode_result_type != T_ILLEGAL) { | |
| 738 top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; | |
| 739 } | |
| 740 assert(top_frame_expression_stack_adjustment >= 0, ""); | |
| 741 try_next_mask = true; | |
| 742 break; | |
| 743 } | |
| 744 } | |
| 745 } | |
| 746 } | |
| 747 | |
| 748 // Verify stack depth and oops in frame | |
| 749 // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) | |
| 750 if (!( | |
| 751 /* SPARC */ | |
| 752 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || | |
| 753 /* x86 */ | |
| 754 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || | |
| 755 (try_next_mask && | |
| 756 (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - | |
| 757 top_frame_expression_stack_adjustment))) || | |
| 758 (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || | |
|
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759 (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute || el->should_reexecute()) && |
| 0 | 760 (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) |
| 761 )) { | |
| 762 ttyLocker ttyl; | |
| 763 | |
| 764 // Print out some information that will help us debug the problem | |
| 765 tty->print_cr("Wrong number of expression stack elements during deoptimization"); | |
| 766 tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); | |
| 767 tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", | |
| 768 iframe->interpreter_frame_expression_stack_size()); | |
| 769 tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); | |
| 770 tty->print_cr(" try_next_mask = %d", try_next_mask); | |
| 771 tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); | |
| 772 tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); | |
| 773 tty->print_cr(" callee_max_locals = %d", callee_max_locals); | |
| 774 tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); | |
| 775 tty->print_cr(" exec_mode = %d", exec_mode); | |
| 776 tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); | |
| 777 tty->print_cr(" Thread = " INTPTR_FORMAT ", thread ID = " UINTX_FORMAT, thread, thread->osthread()->thread_id()); | |
| 778 tty->print_cr(" Interpreted frames:"); | |
| 779 for (int k = 0; k < cur_array->frames(); k++) { | |
| 780 vframeArrayElement* el = cur_array->element(k); | |
| 781 tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); | |
| 782 } | |
| 783 cur_array->print_on_2(tty); | |
| 784 guarantee(false, "wrong number of expression stack elements during deopt"); | |
| 785 } | |
| 786 VerifyOopClosure verify; | |
|
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787 iframe->oops_interpreted_do(&verify, NULL, &rm, false); |
| 0 | 788 callee_size_of_parameters = mh->size_of_parameters(); |
| 789 callee_max_locals = mh->max_locals(); | |
| 790 is_top_frame = false; | |
| 791 } | |
| 792 } | |
| 793 #endif /* !PRODUCT */ | |
| 794 | |
| 795 | |
| 796 return bt; | |
| 797 JRT_END | |
| 798 | |
| 799 | |
| 800 int Deoptimization::deoptimize_dependents() { | |
| 801 Threads::deoptimized_wrt_marked_nmethods(); | |
| 802 return 0; | |
| 803 } | |
| 804 | |
| 805 | |
| 22298 | 806 #if defined(COMPILER2) || INCLUDE_JVMCI |
| 0 | 807 bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, GrowableArray<ScopeValue*>* objects, TRAPS) { |
| 808 Handle pending_exception(thread->pending_exception()); | |
| 809 const char* exception_file = thread->exception_file(); | |
| 810 int exception_line = thread->exception_line(); | |
| 811 thread->clear_pending_exception(); | |
| 812 | |
|
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813 bool failures = false; |
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814 |
| 0 | 815 for (int i = 0; i < objects->length(); i++) { |
| 816 assert(objects->at(i)->is_object(), "invalid debug information"); | |
| 817 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
| 818 | |
|
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819 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 820 oop obj = NULL; |
| 821 | |
| 822 if (k->oop_is_instance()) { | |
|
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823 InstanceKlass* ik = InstanceKlass::cast(k()); |
|
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824 obj = ik->allocate_instance(THREAD); |
| 0 | 825 } else if (k->oop_is_typeArray()) { |
|
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826 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
| 0 | 827 assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length"); |
| 828 int len = sv->field_size() / type2size[ak->element_type()]; | |
|
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829 obj = ak->allocate(len, THREAD); |
| 0 | 830 } else if (k->oop_is_objArray()) { |
|
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831 ObjArrayKlass* ak = ObjArrayKlass::cast(k()); |
|
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832 obj = ak->allocate(sv->field_size(), THREAD); |
| 0 | 833 } |
| 834 | |
|
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835 if (obj == NULL) { |
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836 failures = true; |
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837 } |
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838 |
| 0 | 839 assert(sv->value().is_null(), "redundant reallocation"); |
|
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840 assert(obj != NULL || HAS_PENDING_EXCEPTION, "allocation should succeed or we should get an exception"); |
|
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841 CLEAR_PENDING_EXCEPTION; |
| 0 | 842 sv->set_value(obj); |
| 843 } | |
| 844 | |
|
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845 if (failures) { |
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846 THROW_OOP_(Universe::out_of_memory_error_realloc_objects(), failures); |
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847 } else if (pending_exception.not_null()) { |
| 0 | 848 thread->set_pending_exception(pending_exception(), exception_file, exception_line); |
| 849 } | |
| 850 | |
|
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851 return failures; |
| 0 | 852 } |
| 853 | |
| 854 // restore elements of an eliminated type array | |
| 855 void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { | |
| 856 int index = 0; | |
|
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857 intptr_t val; |
| 0 | 858 |
| 859 for (int i = 0; i < sv->field_size(); i++) { | |
| 860 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
| 861 switch(type) { | |
|
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862 case T_LONG: case T_DOUBLE: { |
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863 assert(value->type() == T_INT, "Agreement."); |
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864 StackValue* low = |
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865 StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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866 #ifdef _LP64 |
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867 jlong res = (jlong)low->get_int(); |
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868 #else |
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869 #ifdef SPARC |
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870 // For SPARC we have to swap high and low words. |
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871 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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872 #else |
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873 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
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874 #endif //SPARC |
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875 #endif |
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876 obj->long_at_put(index, res); |
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877 break; |
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878 } |
|
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879 |
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880 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
|
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881 case T_INT: case T_FLOAT: { // 4 bytes. |
|
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882 assert(value->type() == T_INT, "Agreement."); |
|
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883 bool big_value = false; |
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884 if (i + 1 < sv->field_size() && type == T_INT) { |
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885 if (sv->field_at(i)->is_location()) { |
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886 Location::Type type = ((LocationValue*) sv->field_at(i))->location().type(); |
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887 if (type == Location::dbl || type == Location::lng) { |
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888 big_value = true; |
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889 } |
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890 } else if (sv->field_at(i)->is_constant_int()) { |
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891 ScopeValue* next_scope_field = sv->field_at(i + 1); |
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892 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
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893 big_value = true; |
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894 } |
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895 } |
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896 } |
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897 |
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898 if (big_value) { |
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899 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
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900 #ifdef _LP64 |
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901 jlong res = (jlong)low->get_int(); |
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902 #else |
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903 #ifdef SPARC |
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904 // For SPARC we have to swap high and low words. |
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905 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
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906 #else |
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907 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
|
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908 #endif //SPARC |
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909 #endif |
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910 obj->int_at_put(index, (jint)*((jint*)&res)); |
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911 obj->int_at_put(++index, (jint)*(((jint*)&res) + 1)); |
|
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Andreas Woess <andreas.woess@jku.at>
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diff
changeset
|
912 } else { |
|
5c1bd485c54b
Truffle: fix deoptimization of int[] with double/long values
Andreas Woess <andreas.woess@jku.at>
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diff
changeset
|
913 val = value->get_int(); |
|
5c1bd485c54b
Truffle: fix deoptimization of int[] with double/long values
Andreas Woess <andreas.woess@jku.at>
parents:
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diff
changeset
|
914 obj->int_at_put(index, (jint)*((jint*)&val)); |
|
5c1bd485c54b
Truffle: fix deoptimization of int[] with double/long values
Andreas Woess <andreas.woess@jku.at>
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diff
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|
915 } |
|
44
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
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0
diff
changeset
|
916 break; |
|
18133
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Andreas Woess <andreas.woess@jku.at>
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diff
changeset
|
917 } |
|
44
52fed2ec0afb
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kvn
parents:
0
diff
changeset
|
918 |
|
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kvn
parents:
0
diff
changeset
|
919 case T_SHORT: case T_CHAR: // 2 bytes |
|
52fed2ec0afb
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kvn
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diff
changeset
|
920 assert(value->type() == T_INT, "Agreement."); |
|
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|
921 val = value->get_int(); |
|
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diff
changeset
|
922 obj->short_at_put(index, (jshort)*((jint*)&val)); |
|
52fed2ec0afb
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0
diff
changeset
|
923 break; |
|
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0
diff
changeset
|
924 |
|
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0
diff
changeset
|
925 case T_BOOLEAN: case T_BYTE: // 1 byte |
|
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parents:
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diff
changeset
|
926 assert(value->type() == T_INT, "Agreement."); |
|
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kvn
parents:
0
diff
changeset
|
927 val = value->get_int(); |
|
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kvn
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diff
changeset
|
928 obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
|
52fed2ec0afb
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
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0
diff
changeset
|
929 break; |
|
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6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents:
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diff
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|
930 |
| 0 | 931 default: |
| 932 ShouldNotReachHere(); | |
| 933 } | |
| 934 index++; | |
| 935 } | |
| 936 } | |
| 937 | |
| 938 | |
| 939 // restore fields of an eliminated object array | |
| 940 void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { | |
| 941 for (int i = 0; i < sv->field_size(); i++) { | |
| 942 StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); | |
| 943 assert(value->type() == T_OBJECT, "object element expected"); | |
| 944 obj->obj_at_put(i, value->get_obj()()); | |
| 945 } | |
| 946 } | |
| 947 | |
| 7222 | 948 class ReassignedField { |
| 949 public: | |
| 950 int _offset; | |
| 951 BasicType _type; | |
| 952 public: | |
| 953 ReassignedField() { | |
| 954 _offset = 0; | |
| 955 _type = T_ILLEGAL; | |
| 956 } | |
| 957 }; | |
|
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|
958 |
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|
959 int compare(ReassignedField* left, ReassignedField* right) { |
| 7222 | 960 return left->_offset - right->_offset; |
|
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961 } |
|
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|
962 |
|
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|
963 // Restore fields of an eliminated instance object using the same field order |
|
18223
17c98fad6980
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Doug Simon <doug.simon@oracle.com>
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|
964 // returned by HotSpotResolvedObjectTypeImpl.getInstanceFields(true) |
|
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Tom Rodriguez <tom.rodriguez@oracle.com>
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|
965 static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj, bool skip_internal) { |
|
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|
966 if (klass->superklass() != NULL) { |
|
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|
967 svIndex = reassign_fields_by_klass(klass->superklass(), fr, reg_map, sv, svIndex, obj, skip_internal); |
|
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|
968 } |
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|
969 |
|
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|
970 GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
|
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Doug Simon <doug.simon@oracle.com>
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|
971 for (AllFieldStream fs(klass); !fs.done(); fs.next()) { |
|
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|
972 if (!fs.access_flags().is_static() && (!skip_internal || !fs.access_flags().is_internal())) { |
|
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|
973 ReassignedField field; |
| 7222 | 974 field._offset = fs.offset(); |
| 975 field._type = FieldType::basic_type(fs.signature()); | |
|
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|
976 fields->append(field); |
|
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|
977 } |
|
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|
978 } |
|
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|
979 fields->sort(compare); |
|
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|
980 for (int i = 0; i < fields->length(); i++) { |
|
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|
981 intptr_t val; |
|
12617
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|
982 ScopeValue* scope_field = sv->field_at(svIndex); |
|
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|
983 StackValue* value = StackValue::create_stack_value(fr, reg_map, scope_field); |
| 7222 | 984 int offset = fields->at(i)._offset; |
| 985 BasicType type = fields->at(i)._type; | |
|
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|
986 switch (type) { |
|
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Doug Simon <doug.simon@oracle.com>
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|
987 case T_OBJECT: case T_ARRAY: |
|
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|
988 assert(value->type() == T_OBJECT, "Agreement."); |
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|
989 obj->obj_field_put(offset, value->get_obj()()); |
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|
990 break; |
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|
991 |
|
12617
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|
992 // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
|
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|
993 case T_INT: case T_FLOAT: { // 4 bytes. |
|
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|
994 assert(value->type() == T_INT, "Agreement."); |
|
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|
995 bool big_value = false; |
|
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|
996 if (i+1 < fields->length() && fields->at(i+1)._type == T_INT) { |
|
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|
997 if (scope_field->is_location()) { |
|
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|
998 Location::Type type = ((LocationValue*) scope_field)->location().type(); |
|
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|
999 if (type == Location::dbl || type == Location::lng) { |
|
bca33c3135de
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|
1000 big_value = true; |
|
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|
1001 } |
|
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|
1002 } |
|
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|
1003 if (scope_field->is_constant_int()) { |
|
bca33c3135de
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|
1004 ScopeValue* next_scope_field = sv->field_at(svIndex + 1); |
|
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|
1005 if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
|
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|
1006 big_value = true; |
|
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|
1007 } |
|
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|
1008 } |
|
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|
1009 } |
|
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|
1010 |
|
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|
1011 if (big_value) { |
|
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|
1012 i++; |
|
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|
1013 assert(i < fields->length(), "second T_INT field needed"); |
|
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|
1014 assert(fields->at(i)._type == T_INT, "T_INT field needed"); |
|
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|
1015 } else { |
|
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|
1016 val = value->get_int(); |
|
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|
1017 obj->int_field_put(offset, (jint)*((jint*)&val)); |
|
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|
1018 break; |
|
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|
1019 } |
|
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|
1020 } |
|
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|
1021 /* no break */ |
|
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|
1022 |
|
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|
1023 case T_LONG: case T_DOUBLE: { |
|
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|
1024 assert(value->type() == T_INT, "Agreement."); |
|
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|
1025 StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
|
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|
1026 #ifdef _LP64 |
|
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|
1027 jlong res = (jlong)low->get_int(); |
|
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|
1028 #else |
|
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Doug Simon <doug.simon@oracle.com>
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|
1029 #ifdef SPARC |
|
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|
1030 // For SPARC we have to swap high and low words. |
|
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|
1031 jlong res = jlong_from((jint)low->get_int(), (jint)value->get_int()); |
|
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|
1032 #else |
|
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|
1033 jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
|
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|
1034 #endif //SPARC |
|
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|
1035 #endif |
|
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|
1036 obj->long_field_put(offset, res); |
|
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|
1037 break; |
|
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|
1038 } |
|
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|
1039 |
|
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|
1040 case T_SHORT: case T_CHAR: // 2 bytes |
|
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|
1041 assert(value->type() == T_INT, "Agreement."); |
|
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|
1042 val = value->get_int(); |
|
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|
1043 obj->short_field_put(offset, (jshort)*((jint*)&val)); |
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Doug Simon <doug.simon@oracle.com>
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|
1044 break; |
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1045 |
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|
1046 case T_BOOLEAN: case T_BYTE: // 1 byte |
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|
1047 assert(value->type() == T_INT, "Agreement."); |
|
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|
1048 val = value->get_int(); |
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|
1049 obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
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|
1050 break; |
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1051 |
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|
1052 default: |
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|
1053 ShouldNotReachHere(); |
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1054 } |
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|
1055 svIndex++; |
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1056 } |
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1057 return svIndex; |
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1058 } |
| 0 | 1059 |
| 1060 // restore fields of all eliminated objects and arrays | |
|
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|
1061 void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects, bool realloc_failures, bool skip_internal) { |
| 0 | 1062 for (int i = 0; i < objects->length(); i++) { |
| 1063 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
|
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1064 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 1065 Handle obj = sv->value(); |
|
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1066 assert(obj.not_null() || realloc_failures, "reallocation was missed"); |
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1067 if (obj.is_null()) { |
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1068 continue; |
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1069 } |
|
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1070 if (PrintDeoptimizationDetails) { |
|
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1071 tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
|
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1072 } |
| 0 | 1073 |
| 1074 if (k->oop_is_instance()) { | |
|
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1075 InstanceKlass* ik = InstanceKlass::cast(k()); |
|
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1076 reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj(), skip_internal); |
| 0 | 1077 } else if (k->oop_is_typeArray()) { |
|
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1078 TypeArrayKlass* ak = TypeArrayKlass::cast(k()); |
| 0 | 1079 reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
| 1080 } else if (k->oop_is_objArray()) { | |
| 1081 reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); | |
| 1082 } | |
| 1083 } | |
| 1084 } | |
| 1085 | |
| 1086 | |
| 1087 // relock objects for which synchronization was eliminated | |
|
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1088 void Deoptimization::relock_objects(GrowableArray<MonitorInfo*>* monitors, JavaThread* thread, bool realloc_failures) { |
| 0 | 1089 for (int i = 0; i < monitors->length(); i++) { |
|
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1090 MonitorInfo* mon_info = monitors->at(i); |
|
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1091 if (mon_info->eliminated()) { |
|
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1092 assert(!mon_info->owner_is_scalar_replaced() || realloc_failures, "reallocation was missed"); |
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1093 if (!mon_info->owner_is_scalar_replaced()) { |
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1094 Handle obj = Handle(mon_info->owner()); |
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1095 markOop mark = obj->mark(); |
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1096 if (UseBiasedLocking && mark->has_bias_pattern()) { |
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1097 // New allocated objects may have the mark set to anonymously biased. |
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1098 // Also the deoptimized method may called methods with synchronization |
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1099 // where the thread-local object is bias locked to the current thread. |
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1100 assert(mark->is_biased_anonymously() || |
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1101 mark->biased_locker() == thread, "should be locked to current thread"); |
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1102 // Reset mark word to unbiased prototype. |
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1103 markOop unbiased_prototype = markOopDesc::prototype()->set_age(mark->age()); |
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1104 obj->set_mark(unbiased_prototype); |
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1105 } |
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1106 BasicLock* lock = mon_info->lock(); |
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1107 ObjectSynchronizer::slow_enter(obj, lock, thread); |
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1108 assert(mon_info->owner()->is_locked(), "object must be locked now"); |
|
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1109 } |
| 0 | 1110 } |
| 1111 } | |
| 1112 } | |
| 1113 | |
| 1114 | |
| 1115 #ifndef PRODUCT | |
| 1116 // print information about reallocated objects | |
|
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1117 void Deoptimization::print_objects(GrowableArray<ScopeValue*>* objects, bool realloc_failures) { |
| 0 | 1118 fieldDescriptor fd; |
| 1119 | |
| 1120 for (int i = 0; i < objects->length(); i++) { | |
| 1121 ObjectValue* sv = (ObjectValue*) objects->at(i); | |
|
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1122 KlassHandle k(java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()())); |
| 0 | 1123 Handle obj = sv->value(); |
| 1124 | |
|
12316
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hseigel
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|
1125 tty->print(" object <" INTPTR_FORMAT "> of type ", (void *)sv->value()()); |
|
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1126 k->print_value(); |
|
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1127 assert(obj.not_null() || realloc_failures, "reallocation was missed"); |
|
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1128 if (obj.is_null()) { |
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1129 tty->print(" allocation failed"); |
|
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1130 } else { |
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1131 tty->print(" allocated (%d bytes)", obj->size() * HeapWordSize); |
|
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1132 } |
| 0 | 1133 tty->cr(); |
| 1134 | |
|
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1135 if (Verbose && !obj.is_null()) { |
| 0 | 1136 k->oop_print_on(obj(), tty); |
| 1137 } | |
| 1138 } | |
| 1139 } | |
| 1140 #endif | |
| 22298 | 1141 #endif // COMPILER2 || INCLUDE_JVMCI |
| 0 | 1142 |
|
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|
1143 vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk, bool realloc_failures) { |
|
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|
1144 Events::log(thread, "DEOPT PACKING pc=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, fr.pc(), fr.sp()); |
| 0 | 1145 |
| 1146 #ifndef PRODUCT | |
|
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|
1147 if (PrintDeoptimizationDetails) { |
| 0 | 1148 ttyLocker ttyl; |
| 1149 tty->print("DEOPT PACKING thread " INTPTR_FORMAT " ", thread); | |
| 1150 fr.print_on(tty); | |
| 1151 tty->print_cr(" Virtual frames (innermost first):"); | |
| 1152 for (int index = 0; index < chunk->length(); index++) { | |
| 1153 compiledVFrame* vf = chunk->at(index); | |
| 1154 tty->print(" %2d - ", index); | |
| 1155 vf->print_value(); | |
| 1156 int bci = chunk->at(index)->raw_bci(); | |
| 1157 const char* code_name; | |
| 1158 if (bci == SynchronizationEntryBCI) { | |
| 1159 code_name = "sync entry"; | |
| 1160 } else { | |
| 2142 | 1161 Bytecodes::Code code = vf->method()->code_at(bci); |
| 0 | 1162 code_name = Bytecodes::name(code); |
| 1163 } | |
| 1164 tty->print(" - %s", code_name); | |
| 1165 tty->print_cr(" @ bci %d ", bci); | |
| 1166 if (Verbose) { | |
| 1167 vf->print(); | |
| 1168 tty->cr(); | |
| 1169 } | |
| 1170 } | |
| 1171 } | |
| 1172 #endif | |
| 1173 | |
| 1174 // Register map for next frame (used for stack crawl). We capture | |
| 1175 // the state of the deopt'ing frame's caller. Thus if we need to | |
| 1176 // stuff a C2I adapter we can properly fill in the callee-save | |
| 1177 // register locations. | |
| 1178 frame caller = fr.sender(reg_map); | |
| 1179 int frame_size = caller.sp() - fr.sp(); | |
| 1180 | |
| 1181 frame sender = caller; | |
| 1182 | |
| 1183 // Since the Java thread being deoptimized will eventually adjust it's own stack, | |
| 1184 // the vframeArray containing the unpacking information is allocated in the C heap. | |
| 1185 // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). | |
|
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|
1186 vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr, realloc_failures); |
| 0 | 1187 |
| 1188 // Compare the vframeArray to the collected vframes | |
| 1189 assert(array->structural_compare(thread, chunk), "just checking"); | |
| 1190 | |
| 1191 #ifndef PRODUCT | |
|
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|
1192 if (PrintDeoptimizationDetails) { |
| 0 | 1193 ttyLocker ttyl; |
| 1194 tty->print_cr(" Created vframeArray " INTPTR_FORMAT, array); | |
| 1195 } | |
| 1196 #endif // PRODUCT | |
| 1197 | |
| 1198 return array; | |
| 1199 } | |
| 1200 | |
| 22298 | 1201 #if defined(COMPILER2) || INCLUDE_JVMCI |
|
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1202 void Deoptimization::pop_frames_failed_reallocs(JavaThread* thread, vframeArray* array) { |
|
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1203 // Reallocation of some scalar replaced objects failed. Record |
|
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1204 // that we need to pop all the interpreter frames for the |
|
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|
1205 // deoptimized compiled frame. |
|
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1206 assert(thread->frames_to_pop_failed_realloc() == 0, "missed frames to pop?"); |
|
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|
1207 thread->set_frames_to_pop_failed_realloc(array->frames()); |
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|
1208 // Unlock all monitors here otherwise the interpreter will see a |
|
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|
1209 // mix of locked and unlocked monitors (because of failed |
|
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|
1210 // reallocations of synchronized objects) and be confused. |
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|
1211 for (int i = 0; i < array->frames(); i++) { |
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1212 MonitorChunk* monitors = array->element(i)->monitors(); |
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1213 if (monitors != NULL) { |
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1214 for (int j = 0; j < monitors->number_of_monitors(); j++) { |
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1215 BasicObjectLock* src = monitors->at(j); |
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1216 if (src->obj() != NULL) { |
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1217 ObjectSynchronizer::fast_exit(src->obj(), src->lock(), thread); |
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|
1218 } |
|
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1219 } |
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1220 array->element(i)->free_monitors(thread); |
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1221 #ifdef ASSERT |
|
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1222 array->element(i)->set_removed_monitors(); |
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1223 #endif |
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1224 } |
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1225 } |
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1226 } |
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1227 #endif |
| 0 | 1228 |
| 1229 static void collect_monitors(compiledVFrame* cvf, GrowableArray<Handle>* objects_to_revoke) { | |
| 1230 GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); | |
| 1231 for (int i = 0; i < monitors->length(); i++) { | |
| 1232 MonitorInfo* mon_info = monitors->at(i); | |
|
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|
1233 if (!mon_info->eliminated() && mon_info->owner() != NULL) { |
| 0 | 1234 objects_to_revoke->append(Handle(mon_info->owner())); |
| 1235 } | |
| 1236 } | |
| 1237 } | |
| 1238 | |
| 1239 | |
| 1240 void Deoptimization::revoke_biases_of_monitors(JavaThread* thread, frame fr, RegisterMap* map) { | |
| 1241 if (!UseBiasedLocking) { | |
| 1242 return; | |
| 1243 } | |
| 1244 | |
| 1245 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 1246 | |
| 1247 // Unfortunately we don't have a RegisterMap available in most of | |
| 1248 // the places we want to call this routine so we need to walk the | |
| 1249 // stack again to update the register map. | |
| 1250 if (map == NULL || !map->update_map()) { | |
| 1251 StackFrameStream sfs(thread, true); | |
| 1252 bool found = false; | |
| 1253 while (!found && !sfs.is_done()) { | |
| 1254 frame* cur = sfs.current(); | |
| 1255 sfs.next(); | |
| 1256 found = cur->id() == fr.id(); | |
| 1257 } | |
| 1258 assert(found, "frame to be deoptimized not found on target thread's stack"); | |
| 1259 map = sfs.register_map(); | |
| 1260 } | |
| 1261 | |
| 1262 vframe* vf = vframe::new_vframe(&fr, map, thread); | |
| 1263 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1264 // Revoke monitors' biases in all scopes | |
| 1265 while (!cvf->is_top()) { | |
| 1266 collect_monitors(cvf, objects_to_revoke); | |
| 1267 cvf = compiledVFrame::cast(cvf->sender()); | |
| 1268 } | |
| 1269 collect_monitors(cvf, objects_to_revoke); | |
| 1270 | |
| 1271 if (SafepointSynchronize::is_at_safepoint()) { | |
| 1272 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
| 1273 } else { | |
| 1274 BiasedLocking::revoke(objects_to_revoke); | |
| 1275 } | |
| 1276 } | |
| 1277 | |
| 1278 | |
| 1279 void Deoptimization::revoke_biases_of_monitors(CodeBlob* cb) { | |
| 1280 if (!UseBiasedLocking) { | |
| 1281 return; | |
| 1282 } | |
| 1283 | |
| 1284 assert(SafepointSynchronize::is_at_safepoint(), "must only be called from safepoint"); | |
| 1285 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
| 1286 for (JavaThread* jt = Threads::first(); jt != NULL ; jt = jt->next()) { | |
| 1287 if (jt->has_last_Java_frame()) { | |
| 1288 StackFrameStream sfs(jt, true); | |
| 1289 while (!sfs.is_done()) { | |
| 1290 frame* cur = sfs.current(); | |
| 1291 if (cb->contains(cur->pc())) { | |
| 1292 vframe* vf = vframe::new_vframe(cur, sfs.register_map(), jt); | |
| 1293 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1294 // Revoke monitors' biases in all scopes | |
| 1295 while (!cvf->is_top()) { | |
| 1296 collect_monitors(cvf, objects_to_revoke); | |
| 1297 cvf = compiledVFrame::cast(cvf->sender()); | |
| 1298 } | |
| 1299 collect_monitors(cvf, objects_to_revoke); | |
| 1300 } | |
| 1301 sfs.next(); | |
| 1302 } | |
| 1303 } | |
| 1304 } | |
| 1305 BiasedLocking::revoke_at_safepoint(objects_to_revoke); | |
| 1306 } | |
| 1307 | |
| 1308 | |
|
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1309 void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
| 0 | 1310 assert(fr.can_be_deoptimized(), "checking frame type"); |
| 1311 | |
|
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1312 gather_statistics(reason, Action_none, Bytecodes::_illegal); |
| 0 | 1313 |
|
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1314 if (LogCompilation && xtty != NULL) { |
|
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|
1315 nmethod* nm = fr.cb()->as_nmethod_or_null(); |
|
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1316 assert(nm != NULL, "only nmethods can deopt"); |
|
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|
1317 |
|
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|
1318 ttyLocker ttyl; |
|
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Log deopt before deoptimizing the frame
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1319 xtty->begin_head("deoptimized thread='" UINTX_FORMAT "'", thread->osthread()->thread_id()); |
|
18225
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|
1320 nm->log_identity(xtty); |
|
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|
1321 xtty->end_head(); |
|
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1322 for (ScopeDesc* sd = nm->scope_desc_at(fr.pc()); ; sd = sd->sender()) { |
|
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1323 xtty->begin_elem("jvms bci='%d'", sd->bci()); |
|
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|
1324 xtty->method(sd->method()); |
|
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1325 xtty->end_elem(); |
|
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1326 if (sd->is_top()) break; |
|
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|
1327 } |
|
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1328 xtty->tail("deoptimized"); |
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|
1329 } |
| 0 | 1330 |
| 1331 // Patch the nmethod so that when execution returns to it we will | |
| 1332 // deopt the execution state and return to the interpreter. | |
| 1333 fr.deoptimize(thread); | |
| 1334 } | |
| 1335 | |
| 1336 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map) { | |
|
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1337 deoptimize(thread, fr, map, Reason_constraint); |
|
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1338 } |
|
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1339 |
|
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1340 void Deoptimization::deoptimize(JavaThread* thread, frame fr, RegisterMap *map, DeoptReason reason) { |
| 0 | 1341 // Deoptimize only if the frame comes from compile code. |
| 1342 // Do not deoptimize the frame which is already patched | |
| 1343 // during the execution of the loops below. | |
| 1344 if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { | |
| 1345 return; | |
| 1346 } | |
| 1347 ResourceMark rm; | |
| 1348 DeoptimizationMarker dm; | |
| 1349 if (UseBiasedLocking) { | |
| 1350 revoke_biases_of_monitors(thread, fr, map); | |
| 1351 } | |
|
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1352 deoptimize_single_frame(thread, fr, reason); |
| 0 | 1353 |
| 1354 } | |
| 1355 | |
| 1356 | |
|
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1357 void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
|
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1358 assert(thread == Thread::current() || SafepointSynchronize::is_at_safepoint(), |
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|
1359 "can only deoptimize other thread at a safepoint"); |
| 0 | 1360 // Compute frame and register map based on thread and sp. |
| 1361 RegisterMap reg_map(thread, UseBiasedLocking); | |
| 1362 frame fr = thread->last_frame(); | |
| 1363 while (fr.id() != id) { | |
| 1364 fr = fr.sender(®_map); | |
| 1365 } | |
|
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1366 deoptimize(thread, fr, ®_map, reason); |
| 0 | 1367 } |
| 1368 | |
| 1369 | |
|
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1370 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
|
1905
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1371 if (thread == Thread::current()) { |
|
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1372 Deoptimization::deoptimize_frame_internal(thread, id, reason); |
|
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|
1373 } else { |
|
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|
1374 VM_DeoptimizeFrame deopt(thread, id, reason); |
|
1905
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|
1375 VMThread::execute(&deopt); |
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1376 } |
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1377 } |
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1378 |
|
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|
1379 void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id) { |
|
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1380 deoptimize_frame(thread, id, Reason_constraint); |
|
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1381 } |
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1382 |
| 0 | 1383 // JVMTI PopFrame support |
| 1384 JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address)) | |
| 1385 { | |
| 1386 thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); | |
| 1387 } | |
| 1388 JRT_END | |
| 1389 | |
| 1390 | |
| 22298 | 1391 #if defined(COMPILER2) || defined(SHARK) || INCLUDE_JVMCI |
| 0 | 1392 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index, TRAPS) { |
| 1393 // in case of an unresolved klass entry, load the class. | |
| 1394 if (constant_pool->tag_at(index).is_unresolved_klass()) { | |
|
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|
1395 Klass* tk = constant_pool->klass_at(index, CHECK); |
| 0 | 1396 return; |
| 1397 } | |
| 1398 | |
| 1399 if (!constant_pool->tag_at(index).is_symbol()) return; | |
| 1400 | |
|
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|
1401 Handle class_loader (THREAD, constant_pool->pool_holder()->class_loader()); |
|
2177
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1402 Symbol* symbol = constant_pool->symbol_at(index); |
| 0 | 1403 |
| 1404 // class name? | |
| 1405 if (symbol->byte_at(0) != '(') { | |
|
6940
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|
1406 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
| 0 | 1407 SystemDictionary::resolve_or_null(symbol, class_loader, protection_domain, CHECK); |
| 1408 return; | |
| 1409 } | |
| 1410 | |
| 1411 // then it must be a signature! | |
|
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|
1412 ResourceMark rm(THREAD); |
| 0 | 1413 for (SignatureStream ss(symbol); !ss.is_done(); ss.next()) { |
| 1414 if (ss.is_object()) { | |
|
2177
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|
1415 Symbol* class_name = ss.as_symbol(CHECK); |
|
6940
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|
1416 Handle protection_domain (THREAD, constant_pool->pool_holder()->protection_domain()); |
| 0 | 1417 SystemDictionary::resolve_or_null(class_name, class_loader, protection_domain, CHECK); |
| 1418 } | |
| 1419 } | |
| 1420 } | |
| 1421 | |
| 1422 | |
| 1423 void Deoptimization::load_class_by_index(constantPoolHandle constant_pool, int index) { | |
| 1424 EXCEPTION_MARK; | |
| 1425 load_class_by_index(constant_pool, index, THREAD); | |
| 1426 if (HAS_PENDING_EXCEPTION) { | |
| 1427 // Exception happened during classloading. We ignore the exception here, since it | |
|
14230
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diff
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|
1428 // is going to be rethrown since the current activation is going to be deoptimized and |
| 0 | 1429 // the interpreter will re-execute the bytecode. |
| 1430 CLEAR_PENDING_EXCEPTION; | |
|
14230
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|
1431 // Class loading called java code which may have caused a stack |
|
b9b6934ad75c
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|
1432 // overflow. If the exception was thrown right before the return |
|
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|
1433 // to the runtime the stack is no longer guarded. Reguard the |
|
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|
1434 // stack otherwise if we return to the uncommon trap blob and the |
|
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|
1435 // stack bang causes a stack overflow we crash. |
|
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|
1436 assert(THREAD->is_Java_thread(), "only a java thread can be here"); |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1437 JavaThread* thread = (JavaThread*)THREAD; |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1438 bool guard_pages_enabled = thread->stack_yellow_zone_enabled(); |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1439 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); |
|
b9b6934ad75c
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV
roland
parents:
12316
diff
changeset
|
1440 assert(guard_pages_enabled, "stack banging in uncommon trap blob may cause crash"); |
| 0 | 1441 } |
| 1442 } | |
| 1443 | |
| 1444 JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* thread, jint trap_request)) { | |
| 1445 HandleMark hm; | |
| 1446 | |
| 1447 // uncommon_trap() is called at the beginning of the uncommon trap | |
| 1448 // handler. Note this fact before we start generating temporary frames | |
| 1449 // that can confuse an asynchronous stack walker. This counter is | |
| 1450 // decremented at the end of unpack_frames(). | |
| 1451 thread->inc_in_deopt_handler(); | |
| 1452 | |
| 1453 // We need to update the map if we have biased locking. | |
| 22298 | 1454 #if INCLUDE_JVMCI |
|
22551
71ea8d7db665
removed author tags in comments
Doug Simon <doug.simon@oracle.com>
parents:
22548
diff
changeset
|
1455 // JVMCI might need to get an exception from the stack, which in turn requires the register map to be valid |
|
6428
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1456 RegisterMap reg_map(thread, true); |
|
6278ac5829ce
fix for deopt issue with -XX:-UseBiasedLocking (plus a cosmetic fix in graalCodeInstaller.cpp)
Lukas Stadler <lukas.stadler@jku.at>
parents:
6275
diff
changeset
|
1457 #else |
| 0 | 1458 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
|
1459 #endif |
| 0 | 1460 frame stub_frame = thread->last_frame(); |
| 1461 frame fr = stub_frame.sender(®_map); | |
| 1462 // Make sure the calling nmethod is not getting deoptimized and removed | |
| 1463 // before we are done with it. | |
| 1464 nmethodLocker nl(fr.pc()); | |
| 1465 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4777
diff
changeset
|
1466 // Log a message |
|
10721
5fc4aedf7910
add relative pc to uncommon trap event entry (helps debugging SEGFAULTs in copmiled code)
Lukas Stadler <lukas.stadler@jku.at>
parents:
10408
diff
changeset
|
1467 Events::log(thread, "Uncommon trap: trap_request=" PTR32_FORMAT " fr.pc=" INTPTR_FORMAT " relative=" INTPTR_FORMAT, |
|
5fc4aedf7910
add relative pc to uncommon trap event entry (helps debugging SEGFAULTs in copmiled code)
Lukas Stadler <lukas.stadler@jku.at>
parents:
10408
diff
changeset
|
1468 trap_request, fr.pc(), fr.pc() - fr.cb()->code_begin()); |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4777
diff
changeset
|
1469 |
| 0 | 1470 { |
| 1471 ResourceMark rm; | |
| 1472 | |
| 1473 // Revoke biases of any monitors in the frame to ensure we can migrate them | |
| 1474 revoke_biases_of_monitors(thread, fr, ®_map); | |
| 1475 | |
| 1476 DeoptReason reason = trap_request_reason(trap_request); | |
| 1477 DeoptAction action = trap_request_action(trap_request); | |
| 22298 | 1478 #if INCLUDE_JVMCI |
|
13857
a9604b40f5e7
On HotSpot, debug_id should be an int, not a short
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13768
diff
changeset
|
1479 int debug_id = trap_request_debug_id(trap_request); |
|
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1480 #endif |
| 0 | 1481 jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 |
| 1482 | |
| 1483 vframe* vf = vframe::new_vframe(&fr, ®_map, thread); | |
| 1484 compiledVFrame* cvf = compiledVFrame::cast(vf); | |
| 1485 | |
| 1486 nmethod* nm = cvf->code(); | |
| 1487 | |
| 1488 ScopeDesc* trap_scope = cvf->scope(); | |
|
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1489 |
|
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1490 if (TraceDeoptimization) { |
|
19670
1f95f91dd1d6
Add ttyLocker to TraceDeoptimization output
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18712
diff
changeset
|
1491 ttyLocker ttyl; |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1492 tty->print_cr(" bci=%d pc=" INTPTR_FORMAT ", relative_pc=%d, method=%s" JVMCI_ONLY(", debug_id=%d"), trap_scope->bci(), fr.pc(), fr.pc() - nm->code_begin(), trap_scope->method()->name_and_sig_as_C_string() |
| 22298 | 1493 #if INCLUDE_JVMCI |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1494 , debug_id |
|
12699
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1495 #endif |
|
38b84d5a66fd
Start passing down a 'speculation id' to deoptimizations.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
12617
diff
changeset
|
1496 ); |
|
3017
b4ba003eb11d
Fixed unnecessary node in the graph builder.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2938
diff
changeset
|
1497 } |
| 0 | 1498 |
| 1499 methodHandle trap_method = trap_scope->method(); | |
| 1500 int trap_bci = trap_scope->bci(); | |
| 22298 | 1501 #if INCLUDE_JVMCI |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1502 oop speculation = thread->pending_failed_speculation(); |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1503 if (nm->is_compiled_by_jvmci()) { |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1504 if (speculation != NULL) { |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1505 oop speculation_log = nm->speculation_log(); |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1506 if (speculation_log != NULL) { |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1507 if (TraceDeoptimization || TraceUncollectedSpeculations) { |
|
22699
ea58bbafd5b9
Move SpeculationLog implementation to HotSpotSpeculationLog, because it is not useful for other VMs
Christian Wimmer <christian.wimmer@oracle.com>
parents:
22599
diff
changeset
|
1508 if (HotSpotSpeculationLog::lastFailed(speculation_log) != NULL) { |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1509 tty->print_cr("A speculation that was not collected by the compiler is being overwritten"); |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1510 } |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1511 } |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1512 if (TraceDeoptimization) { |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1513 tty->print_cr("Saving speculation to speculation log"); |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1514 } |
|
22699
ea58bbafd5b9
Move SpeculationLog implementation to HotSpotSpeculationLog, because it is not useful for other VMs
Christian Wimmer <christian.wimmer@oracle.com>
parents:
22599
diff
changeset
|
1515 HotSpotSpeculationLog::set_lastFailed(speculation_log, speculation); |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1516 } else { |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1517 if (TraceDeoptimization) { |
|
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1518 tty->print_cr("Speculation present but no speculation log"); |
|
13642
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1519 } |
|
10f943c778f6
Add code to trace uncollected speculations
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13641
diff
changeset
|
1520 } |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1521 thread->set_pending_failed_speculation(NULL); |
|
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1522 } else { |
|
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1523 if (TraceDeoptimization) { |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1524 tty->print_cr("No speculation"); |
|
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1525 } |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1526 } |
|
13670
f82eb515d58d
deoptimization, replace 'speculation' with 'debug_id' in some debug messages, Add debug messages arounf speculation handling
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13642
diff
changeset
|
1527 } else { |
|
22466
5e61ca976049
documented other JVMCI-specific fields in JavaThread
Doug Simon <doug.simon@oracle.com>
parents:
22460
diff
changeset
|
1528 assert(speculation == NULL, "There should not be a speculation for method compiled by non-JVMCI compilers"); |
|
13714
cffcb8e38c4c
Deoptimization: only process the pendign speculation for Graal-compiled methods
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13670
diff
changeset
|
1529 } |
|
13641
5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13220
diff
changeset
|
1530 |
|
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1531 if (trap_bci == SynchronizationEntryBCI) { |
|
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1532 trap_bci = 0; |
|
22460
f27c163d7dc2
moved JVMCI fields from ThreadShadow to Thread
Doug Simon <doug.simon@oracle.com>
parents:
22441
diff
changeset
|
1533 thread->set_pending_monitorenter(true); |
|
8328
6b6cbd8b8914
Support deoptimizing before the entry to a synchronized method.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
8151
diff
changeset
|
1534 } |
|
16535
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1535 |
|
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1536 if (reason == Deoptimization::Reason_transfer_to_interpreter) { |
|
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1537 thread->set_pending_transfer_to_interpreter(true); |
|
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1538 } |
|
13220
2b43fcc68add
Put _pending_deoptimization and _pending_monitorenter under ifdef GRAAL
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
13216
diff
changeset
|
1539 #endif |
|
16535
ada0a7729b6f
Truffle: introduce debug option to print the stack trace when transferring to the interpreter
Andreas Woess <andreas.woess@jku.at>
parents:
16401
diff
changeset
|
1540 |
| 2142 | 1541 Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
| 0 | 1542 |
| 1543 // Record this event in the histogram. | |
| 1544 gather_statistics(reason, action, trap_bc); | |
| 1545 | |
| 1546 // Ensure that we can record deopt. history: | |
| 17780 | 1547 // Need MDO to record RTM code generation state. |
| 1548 bool create_if_missing = ProfileTraps RTM_OPT_ONLY( || UseRTMLocking ); | |
| 0 | 1549 |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1550 methodHandle profiled_method; |
| 22298 | 1551 #if INCLUDE_JVMCI |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
1552 if (nm->is_compiled_by_jvmci()) { |
|
9571
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1553 profiled_method = nm->method(); |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1554 } else { |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1555 profiled_method = trap_method; |
|
f0ef8f58a1d9
Use root method for deopt reason collecting if possible in non-graalvm
Gilles Duboscq <duboscq@ssw.jku.at>
parents:
9570
diff
changeset
|
1556 } |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1557 #else |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1558 profiled_method = trap_method; |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1559 #endif |
|
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1560 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1561 MethodData* trap_mdo = |
|
9570
314814fa0223
record deopts on the root method
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
1562 get_method_data(thread, profiled_method, create_if_missing); |
| 0 | 1563 |
|
7193
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1564 // Log a message |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1565 Events::log_deopt_message(thread, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT " method=%s @ %d", |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1566 trap_reason_name(reason), trap_action_name(action), fr.pc(), |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1567 trap_method->name_and_sig_as_C_string(), trap_bci); |
|
ee32440febeb
8001538: hs_err file does not list anymore compiled methods in compilation events
vlivanov
parents:
6940
diff
changeset
|
1568 |
| 0 | 1569 // Print a bunch of diagnostics, if requested. |
| 1570 if (TraceDeoptimization || LogCompilation) { | |
| 1571 ResourceMark rm; | |
| 1572 ttyLocker ttyl; | |
| 1573 char buf[100]; | |
| 1574 if (xtty != NULL) { | |
| 1575 xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"' %s", | |
| 1576 os::current_thread_id(), | |
| 1577 format_trap_request(buf, sizeof(buf), trap_request)); | |
| 1578 nm->log_identity(xtty); | |
| 1579 } | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1580 Symbol* class_name = NULL; |
| 0 | 1581 bool unresolved = false; |
| 1582 if (unloaded_class_index >= 0) { | |
| 1583 constantPoolHandle constants (THREAD, trap_method->constants()); | |
| 1584 if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1585 class_name = constants->klass_name_at(unloaded_class_index); |
| 0 | 1586 unresolved = true; |
| 1587 if (xtty != NULL) | |
| 1588 xtty->print(" unresolved='1'"); | |
| 1589 } else if (constants->tag_at(unloaded_class_index).is_symbol()) { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1590 class_name = constants->symbol_at(unloaded_class_index); |
| 0 | 1591 } |
| 1592 if (xtty != NULL) | |
| 1593 xtty->name(class_name); | |
| 1594 } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1595 if (xtty != NULL && trap_mdo != NULL) { |
| 0 | 1596 // Dump the relevant MDO state. |
| 1597 // This is the deopt count for the current reason, any previous | |
| 1598 // reasons or recompiles seen at this point. | |
| 1599 int dcnt = trap_mdo->trap_count(reason); | |
| 1600 if (dcnt != 0) | |
| 1601 xtty->print(" count='%d'", dcnt); | |
| 1602 ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); | |
| 1603 int dos = (pdata == NULL)? 0: pdata->trap_state(); | |
| 1604 if (dos != 0) { | |
| 1605 xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); | |
| 1606 if (trap_state_is_recompiled(dos)) { | |
| 1607 int recnt2 = trap_mdo->overflow_recompile_count(); | |
| 1608 if (recnt2 != 0) | |
| 1609 xtty->print(" recompiles2='%d'", recnt2); | |
| 1610 } | |
| 1611 } | |
| 1612 } | |
| 1613 if (xtty != NULL) { | |
| 1614 xtty->stamp(); | |
| 1615 xtty->end_head(); | |
| 1616 } | |
| 1617 if (TraceDeoptimization) { // make noise on the tty | |
| 1618 tty->print("Uncommon trap occurred in"); | |
| 1619 nm->method()->print_short_name(tty); | |
|
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|
1620 tty->print(" compiler=%s compile_id=%d", nm->compiler() == NULL ? "" : nm->compiler()->name(), nm->compile_id()); |
| 22298 | 1621 #if INCLUDE_JVMCI |
|
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|
1622 oop installedCode = nm->jvmci_installed_code(); |
|
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1623 if (installedCode != NULL) { |
|
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Convert InstalledCode from an interface into an abstract class.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff
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|
1624 oop installedCodeName = NULL; |
|
16401
347915b8cea8
Move name from HotSpotNmethod to InstalledCode to have a name again for truffle nmethods.
Gilles Duboscq <duboscq@ssw.jku.at>
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diff
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|
1625 if (installedCode->is_a(InstalledCode::klass())) { |
|
347915b8cea8
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1626 installedCodeName = InstalledCode::name(installedCode); |
|
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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|
1627 } |
|
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|
1628 if (installedCodeName != NULL) { |
|
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|
1629 tty->print(" (JVMCI: installedCodeName=%s) ", java_lang_String::as_utf8_string(installedCodeName)); |
|
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|
1630 } else { |
|
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|
1631 tty->print(" (JVMCI: installed code has no name) "); |
|
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|
1632 } |
|
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|
1633 } else if (nm->is_compiled_by_jvmci()) { |
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1634 tty->print(" (JVMCI: no installed code) "); |
|
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|
1635 } |
| 22298 | 1636 #endif |
|
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|
1637 tty->print(" (@" INTPTR_FORMAT ") thread=" UINTX_FORMAT " reason=%s action=%s unloaded_class_index=%d" JVMCI_ONLY(" debug_id=%d"), |
| 0 | 1638 fr.pc(), |
| 6843 | 1639 os::current_thread_id(), |
| 0 | 1640 trap_reason_name(reason), |
| 1641 trap_action_name(action), | |
|
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1642 unloaded_class_index |
| 22298 | 1643 #if INCLUDE_JVMCI |
|
13641
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1644 , debug_id |
|
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
1645 #endif |
|
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1646 ); |
|
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1647 if (class_name != NULL) { |
| 0 | 1648 tty->print(unresolved ? " unresolved class: " : " symbol: "); |
| 1649 class_name->print_symbol_on(tty); | |
| 1650 } | |
| 1651 tty->cr(); | |
| 1652 } | |
| 1653 if (xtty != NULL) { | |
| 1654 // Log the precise location of the trap. | |
| 1655 for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { | |
| 1656 xtty->begin_elem("jvms bci='%d'", sd->bci()); | |
| 1657 xtty->method(sd->method()); | |
| 1658 xtty->end_elem(); | |
| 1659 if (sd->is_top()) break; | |
| 1660 } | |
| 1661 xtty->tail("uncommon_trap"); | |
| 1662 } | |
| 1663 } | |
| 1664 // (End diagnostic printout.) | |
| 1665 | |
| 1666 // Load class if necessary | |
| 1667 if (unloaded_class_index >= 0) { | |
| 1668 constantPoolHandle constants(THREAD, trap_method->constants()); | |
| 1669 load_class_by_index(constants, unloaded_class_index); | |
| 1670 } | |
| 1671 | |
| 1672 // Flush the nmethod if necessary and desirable. | |
| 1673 // | |
| 1674 // We need to avoid situations where we are re-flushing the nmethod | |
| 1675 // because of a hot deoptimization site. Repeated flushes at the same | |
| 1676 // point need to be detected by the compiler and avoided. If the compiler | |
| 1677 // cannot avoid them (or has a bug and "refuses" to avoid them), this | |
| 1678 // module must take measures to avoid an infinite cycle of recompilation | |
| 1679 // and deoptimization. There are several such measures: | |
| 1680 // | |
| 1681 // 1. If a recompilation is ordered a second time at some site X | |
| 1682 // and for the same reason R, the action is adjusted to 'reinterpret', | |
| 1683 // to give the interpreter time to exercise the method more thoroughly. | |
| 1684 // If this happens, the method's overflow_recompile_count is incremented. | |
| 1685 // | |
| 1686 // 2. If the compiler fails to reduce the deoptimization rate, then | |
| 1687 // the method's overflow_recompile_count will begin to exceed the set | |
| 1688 // limit PerBytecodeRecompilationCutoff. If this happens, the action | |
| 1689 // is adjusted to 'make_not_compilable', and the method is abandoned | |
| 1690 // to the interpreter. This is a performance hit for hot methods, | |
| 1691 // but is better than a disastrous infinite cycle of recompilations. | |
| 1692 // (Actually, only the method containing the site X is abandoned.) | |
| 1693 // | |
| 1694 // 3. In parallel with the previous measures, if the total number of | |
| 1695 // recompilations of a method exceeds the much larger set limit | |
| 1696 // PerMethodRecompilationCutoff, the method is abandoned. | |
| 1697 // This should only happen if the method is very large and has | |
| 1698 // many "lukewarm" deoptimizations. The code which enforces this | |
|
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1699 // limit is elsewhere (class nmethod, class Method). |
| 0 | 1700 // |
| 1701 // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance | |
| 1702 // to recompile at each bytecode independently of the per-BCI cutoff. | |
| 1703 // | |
| 1704 // The decision to update code is up to the compiler, and is encoded | |
| 1705 // in the Action_xxx code. If the compiler requests Action_none | |
| 1706 // no trap state is changed, no compiled code is changed, and the | |
| 1707 // computation suffers along in the interpreter. | |
| 1708 // | |
| 1709 // The other action codes specify various tactics for decompilation | |
| 1710 // and recompilation. Action_maybe_recompile is the loosest, and | |
| 1711 // allows the compiled code to stay around until enough traps are seen, | |
| 1712 // and until the compiler gets around to recompiling the trapping method. | |
| 1713 // | |
| 1714 // The other actions cause immediate removal of the present code. | |
| 1715 | |
| 1716 bool update_trap_state = true; | |
| 1717 bool make_not_entrant = false; | |
| 1718 bool make_not_compilable = false; | |
| 1783 | 1719 bool reprofile = false; |
| 0 | 1720 switch (action) { |
| 1721 case Action_none: | |
| 1722 // Keep the old code. | |
| 1723 update_trap_state = false; | |
| 1724 break; | |
| 1725 case Action_maybe_recompile: | |
| 1726 // Do not need to invalidate the present code, but we can | |
| 1727 // initiate another | |
| 1728 // Start compiler without (necessarily) invalidating the nmethod. | |
| 1729 // The system will tolerate the old code, but new code should be | |
| 1730 // generated when possible. | |
| 1731 break; | |
| 1732 case Action_reinterpret: | |
| 1733 // Go back into the interpreter for a while, and then consider | |
| 1734 // recompiling form scratch. | |
| 1735 make_not_entrant = true; | |
| 1736 // Reset invocation counter for outer most method. | |
| 1737 // This will allow the interpreter to exercise the bytecodes | |
| 1738 // for a while before recompiling. | |
| 1739 // By contrast, Action_make_not_entrant is immediate. | |
| 1740 // | |
| 1741 // Note that the compiler will track null_check, null_assert, | |
| 1742 // range_check, and class_check events and log them as if they | |
| 1743 // had been traps taken from compiled code. This will update | |
| 1744 // the MDO trap history so that the next compilation will | |
| 1745 // properly detect hot trap sites. | |
| 1783 | 1746 reprofile = true; |
| 0 | 1747 break; |
| 1748 case Action_make_not_entrant: | |
| 1749 // Request immediate recompilation, and get rid of the old code. | |
| 1750 // Make them not entrant, so next time they are called they get | |
| 1751 // recompiled. Unloaded classes are loaded now so recompile before next | |
| 1752 // time they are called. Same for uninitialized. The interpreter will | |
| 1753 // link the missing class, if any. | |
| 1754 make_not_entrant = true; | |
| 1755 break; | |
| 1756 case Action_make_not_compilable: | |
| 1757 // Give up on compiling this method at all. | |
| 1758 make_not_entrant = true; | |
| 1759 make_not_compilable = true; | |
| 1760 break; | |
| 1761 default: | |
| 1762 ShouldNotReachHere(); | |
| 1763 } | |
| 1764 | |
| 1765 // Setting +ProfileTraps fixes the following, on all platforms: | |
| 1766 // 4852688: ProfileInterpreter is off by default for ia64. The result is | |
| 1767 // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the | |
|
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1768 // recompile relies on a MethodData* to record heroic opt failures. |
| 0 | 1769 |
| 1770 // Whether the interpreter is producing MDO data or not, we also need | |
| 1771 // to use the MDO to detect hot deoptimization points and control | |
| 1772 // aggressive optimization. | |
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1773 bool inc_recompile_count = false; |
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1774 ProfileData* pdata = NULL; |
|
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1775 if (ProfileTraps && update_trap_state && trap_mdo != NULL) { |
|
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|
1776 assert(trap_mdo == get_method_data(thread, profiled_method, false), "sanity"); |
| 0 | 1777 uint this_trap_count = 0; |
| 1778 bool maybe_prior_trap = false; | |
| 1779 bool maybe_prior_recompile = false; | |
|
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1780 pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
| 22298 | 1781 #if INCLUDE_JVMCI |
|
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|
1782 nm->is_compiled_by_jvmci() && nm->is_osr_method(), |
|
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|
1783 #endif |
|
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1784 nm->method(), |
| 0 | 1785 //outputs: |
| 1786 this_trap_count, | |
| 1787 maybe_prior_trap, | |
| 1788 maybe_prior_recompile); | |
| 1789 // Because the interpreter also counts null, div0, range, and class | |
| 1790 // checks, these traps from compiled code are double-counted. | |
| 1791 // This is harmless; it just means that the PerXTrapLimit values | |
| 1792 // are in effect a little smaller than they look. | |
| 1793 | |
| 1794 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
| 1795 if (per_bc_reason != Reason_none) { | |
| 1796 // Now take action based on the partially known per-BCI history. | |
| 1797 if (maybe_prior_trap | |
| 1798 && this_trap_count >= (uint)PerBytecodeTrapLimit) { | |
| 1799 // If there are too many traps at this BCI, force a recompile. | |
| 1800 // This will allow the compiler to see the limit overflow, and | |
| 1801 // take corrective action, if possible. The compiler generally | |
| 1802 // does not use the exact PerBytecodeTrapLimit value, but instead | |
| 1803 // changes its tactics if it sees any traps at all. This provides | |
| 1804 // a little hysteresis, delaying a recompile until a trap happens | |
| 1805 // several times. | |
| 1806 // | |
| 1807 // Actually, since there is only one bit of counter per BCI, | |
| 1808 // the possible per-BCI counts are {0,1,(per-method count)}. | |
| 1809 // This produces accurate results if in fact there is only | |
| 1810 // one hot trap site, but begins to get fuzzy if there are | |
| 1811 // many sites. For example, if there are ten sites each | |
| 1812 // trapping two or more times, they each get the blame for | |
| 1813 // all of their traps. | |
| 1814 make_not_entrant = true; | |
| 1815 } | |
| 1816 | |
| 1817 // Detect repeated recompilation at the same BCI, and enforce a limit. | |
| 1818 if (make_not_entrant && maybe_prior_recompile) { | |
| 1819 // More than one recompile at this point. | |
|
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1820 inc_recompile_count = maybe_prior_trap; |
| 0 | 1821 } |
| 1822 } else { | |
| 1823 // For reasons which are not recorded per-bytecode, we simply | |
| 1824 // force recompiles unconditionally. | |
| 1825 // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) | |
| 1826 make_not_entrant = true; | |
| 1827 } | |
| 1828 | |
| 1829 // Go back to the compiler if there are too many traps in this method. | |
|
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1830 if (this_trap_count >= per_method_trap_limit(reason)) { |
| 0 | 1831 // If there are too many traps in this method, force a recompile. |
| 1832 // This will allow the compiler to see the limit overflow, and | |
| 1833 // take corrective action, if possible. | |
| 1834 // (This condition is an unlikely backstop only, because the | |
| 1835 // PerBytecodeTrapLimit is more likely to take effect first, | |
| 1836 // if it is applicable.) | |
| 1837 make_not_entrant = true; | |
| 1838 } | |
| 1839 | |
| 1840 // Here's more hysteresis: If there has been a recompile at | |
| 1841 // this trap point already, run the method in the interpreter | |
| 1842 // for a while to exercise it more thoroughly. | |
| 1843 if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { | |
| 1783 | 1844 reprofile = true; |
| 0 | 1845 } |
| 1846 | |
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1847 } |
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1848 |
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1849 // Take requested actions on the method: |
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1850 |
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1851 // Recompile |
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1852 if (make_not_entrant) { |
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1853 if (!nm->make_not_entrant()) { |
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1854 return; // the call did not change nmethod's state |
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1855 } |
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1856 |
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1857 if (pdata != NULL) { |
| 0 | 1858 // Record the recompilation event, if any. |
| 1859 int tstate0 = pdata->trap_state(); | |
| 1860 int tstate1 = trap_state_set_recompiled(tstate0, true); | |
| 1861 if (tstate1 != tstate0) | |
| 1862 pdata->set_trap_state(tstate1); | |
| 1863 } | |
| 17780 | 1864 |
| 1865 #if INCLUDE_RTM_OPT | |
| 1866 // Restart collecting RTM locking abort statistic if the method | |
| 1867 // is recompiled for a reason other than RTM state change. | |
| 1868 // Assume that in new recompiled code the statistic could be different, | |
| 1869 // for example, due to different inlining. | |
| 1870 if ((reason != Reason_rtm_state_change) && (trap_mdo != NULL) && | |
| 1871 UseRTMDeopt && (nm->rtm_state() != ProfileRTM)) { | |
| 1872 trap_mdo->atomic_set_rtm_state(ProfileRTM); | |
| 1873 } | |
| 1874 #endif | |
| 0 | 1875 } |
| 1876 | |
|
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1877 if (inc_recompile_count) { |
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1878 trap_mdo->inc_overflow_recompile_count(); |
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1879 if ((uint)trap_mdo->overflow_recompile_count() > |
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1880 (uint)PerBytecodeRecompilationCutoff) { |
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1881 // Give up on the method containing the bad BCI. |
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1882 if (trap_method() == nm->method()) { |
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1883 make_not_compilable = true; |
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1884 } else { |
| 7998 | 1885 trap_method->set_not_compilable(CompLevel_full_optimization, true, "overflow_recompile_count > PerBytecodeRecompilationCutoff"); |
|
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1886 // But give grace to the enclosing nm->method(). |
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1887 } |
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1888 } |
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1889 } |
| 0 | 1890 |
| 1783 | 1891 // Reprofile |
| 1892 if (reprofile) { | |
| 1893 CompilationPolicy::policy()->reprofile(trap_scope, nm->is_osr_method()); | |
| 0 | 1894 } |
| 1895 | |
| 1896 // Give up compiling | |
| 1783 | 1897 if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
| 0 | 1898 assert(make_not_entrant, "consistent"); |
| 1783 | 1899 nm->method()->set_not_compilable(CompLevel_full_optimization); |
| 0 | 1900 } |
| 1901 | |
| 1902 } // Free marked resources | |
| 1903 | |
| 1904 } | |
| 1905 JRT_END | |
| 1906 | |
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1907 MethodData* |
| 0 | 1908 Deoptimization::get_method_data(JavaThread* thread, methodHandle m, |
| 1909 bool create_if_missing) { | |
| 1910 Thread* THREAD = thread; | |
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1911 MethodData* mdo = m()->method_data(); |
| 0 | 1912 if (mdo == NULL && create_if_missing && !HAS_PENDING_EXCEPTION) { |
| 1913 // Build an MDO. Ignore errors like OutOfMemory; | |
| 1914 // that simply means we won't have an MDO to update. | |
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1915 Method::build_interpreter_method_data(m, THREAD); |
| 0 | 1916 if (HAS_PENDING_EXCEPTION) { |
| 1917 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
| 1918 CLEAR_PENDING_EXCEPTION; | |
| 1919 } | |
| 1920 mdo = m()->method_data(); | |
| 1921 } | |
| 1922 return mdo; | |
| 1923 } | |
| 1924 | |
| 1925 ProfileData* | |
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1926 Deoptimization::query_update_method_data(MethodData* trap_mdo, |
| 0 | 1927 int trap_bci, |
| 1928 Deoptimization::DeoptReason reason, | |
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1929 bool update_total_trap_count, |
| 22298 | 1930 #if INCLUDE_JVMCI |
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1931 bool is_osr, |
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1932 #endif |
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1933 Method* compiled_method, |
| 0 | 1934 //outputs: |
| 1935 uint& ret_this_trap_count, | |
| 1936 bool& ret_maybe_prior_trap, | |
| 1937 bool& ret_maybe_prior_recompile) { | |
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1938 bool maybe_prior_trap = false; |
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1939 bool maybe_prior_recompile = false; |
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1940 uint this_trap_count = 0; |
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1941 if (update_total_trap_count) { |
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1942 uint idx = reason; |
| 22298 | 1943 #if INCLUDE_JVMCI |
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1944 if (is_osr) { |
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1945 idx += Reason_LIMIT; |
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1946 } |
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1947 #endif |
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1948 uint prior_trap_count = trap_mdo->trap_count(idx); |
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1949 this_trap_count = trap_mdo->inc_trap_count(idx); |
| 0 | 1950 |
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1951 // If the runtime cannot find a place to store trap history, |
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1952 // it is estimated based on the general condition of the method. |
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1953 // If the method has ever been recompiled, or has ever incurred |
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1954 // a trap with the present reason , then this BCI is assumed |
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1955 // (pessimistically) to be the culprit. |
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1956 maybe_prior_trap = (prior_trap_count != 0); |
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1957 maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
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1958 } |
| 0 | 1959 ProfileData* pdata = NULL; |
| 1960 | |
| 1961 | |
| 1962 // For reasons which are recorded per bytecode, we check per-BCI data. | |
| 1963 DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); | |
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1964 assert(per_bc_reason != Reason_none || update_total_trap_count, "must be"); |
| 0 | 1965 if (per_bc_reason != Reason_none) { |
| 1966 // Find the profile data for this BCI. If there isn't one, | |
| 1967 // try to allocate one from the MDO's set of spares. | |
| 1968 // This will let us detect a repeated trap at this point. | |
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1969 pdata = trap_mdo->allocate_bci_to_data(trap_bci, reason_is_speculate(reason) ? compiled_method : NULL); |
| 0 | 1970 |
| 1971 if (pdata != NULL) { | |
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1972 if (reason_is_speculate(reason) && !pdata->is_SpeculativeTrapData()) { |
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1973 if (LogCompilation && xtty != NULL) { |
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1974 ttyLocker ttyl; |
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1975 // no more room for speculative traps in this MDO |
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1976 xtty->elem("speculative_traps_oom"); |
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1977 } |
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1978 } |
| 0 | 1979 // Query the trap state of this profile datum. |
| 1980 int tstate0 = pdata->trap_state(); | |
| 1981 if (!trap_state_has_reason(tstate0, per_bc_reason)) | |
| 1982 maybe_prior_trap = false; | |
| 1983 if (!trap_state_is_recompiled(tstate0)) | |
| 1984 maybe_prior_recompile = false; | |
| 1985 | |
| 1986 // Update the trap state of this profile datum. | |
| 1987 int tstate1 = tstate0; | |
| 1988 // Record the reason. | |
| 1989 tstate1 = trap_state_add_reason(tstate1, per_bc_reason); | |
| 1990 // Store the updated state on the MDO, for next time. | |
| 1991 if (tstate1 != tstate0) | |
| 1992 pdata->set_trap_state(tstate1); | |
| 1993 } else { | |
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1994 if (LogCompilation && xtty != NULL) { |
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1995 ttyLocker ttyl; |
| 0 | 1996 // Missing MDP? Leave a small complaint in the log. |
| 1997 xtty->elem("missing_mdp bci='%d'", trap_bci); | |
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1998 } |
| 0 | 1999 } |
| 2000 } | |
| 2001 | |
| 2002 // Return results: | |
| 2003 ret_this_trap_count = this_trap_count; | |
| 2004 ret_maybe_prior_trap = maybe_prior_trap; | |
| 2005 ret_maybe_prior_recompile = maybe_prior_recompile; | |
| 2006 return pdata; | |
| 2007 } | |
| 2008 | |
| 2009 void | |
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2010 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 0 | 2011 ResourceMark rm; |
| 2012 // Ignored outputs: | |
| 2013 uint ignore_this_trap_count; | |
| 2014 bool ignore_maybe_prior_trap; | |
| 2015 bool ignore_maybe_prior_recompile; | |
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2016 assert(!reason_is_speculate(reason), "reason speculate only used by compiler"); |
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2017 // JVMCI uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
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2018 bool update_total_counts = JVMCI_ONLY(false) NOT_JVMCI(true); |
| 0 | 2019 query_update_method_data(trap_mdo, trap_bci, |
| 2020 (DeoptReason)reason, | |
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2021 update_total_counts, |
| 22298 | 2022 #if INCLUDE_JVMCI |
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2023 false, |
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2024 #endif |
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2025 NULL, |
| 0 | 2026 ignore_this_trap_count, |
| 2027 ignore_maybe_prior_trap, | |
| 2028 ignore_maybe_prior_recompile); | |
| 2029 } | |
| 2030 | |
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2031 Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* thread, jint trap_request, jint exec_mode) { |
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2032 if (TraceDeoptimization) { |
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2033 tty->print("Uncommon trap "); |
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2034 } |
| 0 | 2035 // Still in Java no safepoints |
| 2036 { | |
| 2037 // This enters VM and may safepoint | |
| 2038 uncommon_trap_inner(thread, trap_request); | |
| 2039 } | |
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2040 return fetch_unroll_info_helper(thread, exec_mode); |
| 0 | 2041 } |
| 2042 | |
| 2043 // Local derived constants. | |
| 2044 // Further breakdown of DataLayout::trap_state, as promised by DataLayout. | |
| 2045 const int DS_REASON_MASK = DataLayout::trap_mask >> 1; | |
| 2046 const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; | |
| 2047 | |
| 2048 //---------------------------trap_state_reason--------------------------------- | |
| 2049 Deoptimization::DeoptReason | |
| 2050 Deoptimization::trap_state_reason(int trap_state) { | |
| 2051 // This assert provides the link between the width of DataLayout::trap_bits | |
| 2052 // and the encoding of "recorded" reasons. It ensures there are enough | |
| 2053 // bits to store all needed reasons in the per-BCI MDO profile. | |
| 2054 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
| 2055 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 2056 trap_state -= recompile_bit; | |
| 2057 if (trap_state == DS_REASON_MASK) { | |
| 2058 return Reason_many; | |
| 2059 } else { | |
| 2060 assert((int)Reason_none == 0, "state=0 => Reason_none"); | |
| 2061 return (DeoptReason)trap_state; | |
| 2062 } | |
| 2063 } | |
| 2064 //-------------------------trap_state_has_reason------------------------------- | |
| 2065 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
| 2066 assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason"); | |
| 2067 assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits"); | |
| 2068 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 2069 trap_state -= recompile_bit; | |
| 2070 if (trap_state == DS_REASON_MASK) { | |
| 2071 return -1; // true, unspecifically (bottom of state lattice) | |
| 2072 } else if (trap_state == reason) { | |
| 2073 return 1; // true, definitely | |
| 2074 } else if (trap_state == 0) { | |
| 2075 return 0; // false, definitely (top of state lattice) | |
| 2076 } else { | |
| 2077 return 0; // false, definitely | |
| 2078 } | |
| 2079 } | |
| 2080 //-------------------------trap_state_add_reason------------------------------- | |
| 2081 int Deoptimization::trap_state_add_reason(int trap_state, int reason) { | |
| 2082 assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason"); | |
| 2083 int recompile_bit = (trap_state & DS_RECOMPILE_BIT); | |
| 2084 trap_state -= recompile_bit; | |
| 2085 if (trap_state == DS_REASON_MASK) { | |
| 2086 return trap_state + recompile_bit; // already at state lattice bottom | |
| 2087 } else if (trap_state == reason) { | |
| 2088 return trap_state + recompile_bit; // the condition is already true | |
| 2089 } else if (trap_state == 0) { | |
| 2090 return reason + recompile_bit; // no condition has yet been true | |
| 2091 } else { | |
| 2092 return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom | |
| 2093 } | |
| 2094 } | |
| 2095 //-----------------------trap_state_is_recompiled------------------------------ | |
| 2096 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
| 2097 return (trap_state & DS_RECOMPILE_BIT) != 0; | |
| 2098 } | |
| 2099 //-----------------------trap_state_set_recompiled----------------------------- | |
| 2100 int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { | |
| 2101 if (z) return trap_state | DS_RECOMPILE_BIT; | |
| 2102 else return trap_state & ~DS_RECOMPILE_BIT; | |
| 2103 } | |
| 2104 //---------------------------format_trap_state--------------------------------- | |
|
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2105 // This is used for debugging and diagnostics, including LogFile output. |
| 0 | 2106 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
| 2107 int trap_state) { | |
| 2108 DeoptReason reason = trap_state_reason(trap_state); | |
| 2109 bool recomp_flag = trap_state_is_recompiled(trap_state); | |
| 2110 // Re-encode the state from its decoded components. | |
| 2111 int decoded_state = 0; | |
| 2112 if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) | |
| 2113 decoded_state = trap_state_add_reason(decoded_state, reason); | |
| 2114 if (recomp_flag) | |
| 2115 decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); | |
| 2116 // If the state re-encodes properly, format it symbolically. | |
| 2117 // Because this routine is used for debugging and diagnostics, | |
| 2118 // be robust even if the state is a strange value. | |
| 2119 size_t len; | |
| 2120 if (decoded_state != trap_state) { | |
| 2121 // Random buggy state that doesn't decode?? | |
| 2122 len = jio_snprintf(buf, buflen, "#%d", trap_state); | |
| 2123 } else { | |
| 2124 len = jio_snprintf(buf, buflen, "%s%s", | |
| 2125 trap_reason_name(reason), | |
| 2126 recomp_flag ? " recompiled" : ""); | |
| 2127 } | |
| 2128 if (len >= buflen) | |
| 2129 buf[buflen-1] = '\0'; | |
| 2130 return buf; | |
| 2131 } | |
| 2132 | |
| 2133 | |
| 2134 //--------------------------------statics-------------------------------------- | |
| 2135 Deoptimization::DeoptAction Deoptimization::_unloaded_action | |
| 2136 = Deoptimization::Action_reinterpret; | |
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2137 const char* Deoptimization::_trap_reason_name[] = { |
| 0 | 2138 // Note: Keep this in sync. with enum DeoptReason. |
| 2139 "none", | |
| 2140 "null_check", | |
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2141 "null_assert" JVMCI_ONLY("_or_unreached0"), |
| 0 | 2142 "range_check", |
| 2143 "class_check", | |
| 2144 "array_check", | |
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2145 "intrinsic" JVMCI_ONLY("_or_type_checked_inlining"), |
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2146 "bimorphic" JVMCI_ONLY("_or_optimized_type_check"), |
| 0 | 2147 "unloaded", |
| 2148 "uninitialized", | |
| 2149 "unreached", | |
| 2150 "unhandled", | |
| 2151 "constraint", | |
| 2152 "div0_check", | |
| 1172 | 2153 "age", |
| 3345 | 2154 "predicate", |
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2155 "loop_limit_check", |
| 17780 | 2156 "speculate_class_check", |
|
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2157 "rtm_state_change", |
|
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Fix missing comma and add STATIC_ASSERT to check size of trap name talbe
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|
2158 "unstable_if", |
| 22298 | 2159 #if INCLUDE_JVMCI |
|
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Andreas Woess <andreas.woess@jku.at>
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|
2160 "aliasing", |
|
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2161 "transfer_to_interpreter", |
|
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2162 "not_compiled_exception_handler", |
|
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2163 "unresolved", |
|
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|
2164 "jsr_mismatch" |
|
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2165 #endif |
| 0 | 2166 }; |
|
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2167 const char* Deoptimization::_trap_action_name[] = { |
| 0 | 2168 // Note: Keep this in sync. with enum DeoptAction. |
| 2169 "none", | |
| 2170 "maybe_recompile", | |
| 2171 "reinterpret", | |
| 2172 "make_not_entrant", | |
| 2173 "make_not_compilable" | |
| 2174 }; | |
| 2175 | |
| 2176 const char* Deoptimization::trap_reason_name(int reason) { | |
|
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2177 // Check that every reason has a name |
|
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|
2178 STATIC_ASSERT(sizeof(_trap_reason_name)/sizeof(const char*) == Reason_LIMIT); |
|
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2179 |
| 0 | 2180 if (reason == Reason_many) return "many"; |
| 2181 if ((uint)reason < Reason_LIMIT) | |
| 2182 return _trap_reason_name[reason]; | |
| 2183 static char buf[20]; | |
| 2184 sprintf(buf, "reason%d", reason); | |
| 2185 return buf; | |
| 2186 } | |
| 2187 const char* Deoptimization::trap_action_name(int action) { | |
|
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2188 // Check that every action has a name |
|
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2189 STATIC_ASSERT(sizeof(_trap_action_name)/sizeof(const char*) == Action_LIMIT); |
|
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|
2190 |
| 0 | 2191 if ((uint)action < Action_LIMIT) |
| 2192 return _trap_action_name[action]; | |
| 2193 static char buf[20]; | |
| 2194 sprintf(buf, "action%d", action); | |
| 2195 return buf; | |
| 2196 } | |
| 2197 | |
|
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2198 // This is used for debugging and diagnostics, including LogFile output. |
| 0 | 2199 const char* Deoptimization::format_trap_request(char* buf, size_t buflen, |
| 2200 int trap_request) { | |
| 2201 jint unloaded_class_index = trap_request_index(trap_request); | |
| 2202 const char* reason = trap_reason_name(trap_request_reason(trap_request)); | |
| 2203 const char* action = trap_action_name(trap_request_action(trap_request)); | |
| 22298 | 2204 #if INCLUDE_JVMCI |
|
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2205 int debug_id = trap_request_debug_id(trap_request); |
|
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|
2206 #endif |
| 0 | 2207 size_t len; |
| 2208 if (unloaded_class_index < 0) { | |
|
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Doug Simon <doug.simon@oracle.com>
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|
2209 len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" JVMCI_ONLY(" debug_id='%d'"), |
|
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
2210 reason, action |
| 22298 | 2211 #if INCLUDE_JVMCI |
|
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
2212 ,debug_id |
|
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|
2213 #endif |
|
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|
2214 ); |
| 0 | 2215 } else { |
|
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|
2216 len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" JVMCI_ONLY(" debug_id='%d'"), |
|
12699
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Gilles Duboscq <duboscq@ssw.jku.at>
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|
2217 reason, action, unloaded_class_index |
| 22298 | 2218 #if INCLUDE_JVMCI |
|
13641
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13220
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|
2219 ,debug_id |
|
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|
2220 #endif |
|
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|
2221 ); |
| 0 | 2222 } |
| 2223 if (len >= buflen) | |
| 2224 buf[buflen-1] = '\0'; | |
| 2225 return buf; | |
| 2226 } | |
| 2227 | |
| 2228 juint Deoptimization::_deoptimization_hist | |
| 2229 [Deoptimization::Reason_LIMIT] | |
| 2230 [1 + Deoptimization::Action_LIMIT] | |
| 2231 [Deoptimization::BC_CASE_LIMIT] | |
| 2232 = {0}; | |
| 2233 | |
| 2234 enum { | |
| 2235 LSB_BITS = 8, | |
| 2236 LSB_MASK = right_n_bits(LSB_BITS) | |
| 2237 }; | |
| 2238 | |
| 2239 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
| 2240 Bytecodes::Code bc) { | |
| 2241 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
| 2242 assert(action >= 0 && action < Action_LIMIT, "oob"); | |
| 2243 _deoptimization_hist[Reason_none][0][0] += 1; // total | |
| 2244 _deoptimization_hist[reason][0][0] += 1; // per-reason total | |
| 2245 juint* cases = _deoptimization_hist[reason][1+action]; | |
| 2246 juint* bc_counter_addr = NULL; | |
| 2247 juint bc_counter = 0; | |
| 2248 // Look for an unused counter, or an exact match to this BC. | |
| 2249 if (bc != Bytecodes::_illegal) { | |
| 2250 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
| 2251 juint* counter_addr = &cases[bc_case]; | |
| 2252 juint counter = *counter_addr; | |
| 2253 if ((counter == 0 && bc_counter_addr == NULL) | |
| 2254 || (Bytecodes::Code)(counter & LSB_MASK) == bc) { | |
| 2255 // this counter is either free or is already devoted to this BC | |
| 2256 bc_counter_addr = counter_addr; | |
| 2257 bc_counter = counter | bc; | |
| 2258 } | |
| 2259 } | |
| 2260 } | |
| 2261 if (bc_counter_addr == NULL) { | |
| 2262 // Overflow, or no given bytecode. | |
| 2263 bc_counter_addr = &cases[BC_CASE_LIMIT-1]; | |
| 2264 bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB | |
| 2265 } | |
| 2266 *bc_counter_addr = bc_counter + (1 << LSB_BITS); | |
| 2267 } | |
| 2268 | |
| 2269 jint Deoptimization::total_deoptimization_count() { | |
| 2270 return _deoptimization_hist[Reason_none][0][0]; | |
| 2271 } | |
| 2272 | |
| 2273 jint Deoptimization::deoptimization_count(DeoptReason reason) { | |
| 2274 assert(reason >= 0 && reason < Reason_LIMIT, "oob"); | |
| 2275 return _deoptimization_hist[reason][0][0]; | |
| 2276 } | |
| 2277 | |
| 2278 void Deoptimization::print_statistics() { | |
| 2279 juint total = total_deoptimization_count(); | |
| 2280 juint account = total; | |
| 2281 if (total != 0) { | |
| 2282 ttyLocker ttyl; | |
| 2283 if (xtty != NULL) xtty->head("statistics type='deoptimization'"); | |
| 2284 tty->print_cr("Deoptimization traps recorded:"); | |
| 2285 #define PRINT_STAT_LINE(name, r) \ | |
| 2286 tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); | |
| 2287 PRINT_STAT_LINE("total", total); | |
| 2288 // For each non-zero entry in the histogram, print the reason, | |
| 2289 // the action, and (if specifically known) the type of bytecode. | |
| 2290 for (int reason = 0; reason < Reason_LIMIT; reason++) { | |
| 2291 for (int action = 0; action < Action_LIMIT; action++) { | |
| 2292 juint* cases = _deoptimization_hist[reason][1+action]; | |
| 2293 for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { | |
| 2294 juint counter = cases[bc_case]; | |
| 2295 if (counter != 0) { | |
| 2296 char name[1*K]; | |
| 2297 Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); | |
| 2298 if (bc_case == BC_CASE_LIMIT && (int)bc == 0) | |
| 2299 bc = Bytecodes::_illegal; | |
| 2300 sprintf(name, "%s/%s/%s", | |
| 2301 trap_reason_name(reason), | |
| 2302 trap_action_name(action), | |
| 2303 Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); | |
| 2304 juint r = counter >> LSB_BITS; | |
| 2305 tty->print_cr(" %40s: " UINT32_FORMAT " (%.1f%%)", name, r, (r * 100.0) / total); | |
| 2306 account -= r; | |
| 2307 } | |
| 2308 } | |
| 2309 } | |
| 2310 } | |
| 2311 if (account != 0) { | |
| 2312 PRINT_STAT_LINE("unaccounted", account); | |
| 2313 } | |
| 2314 #undef PRINT_STAT_LINE | |
| 2315 if (xtty != NULL) xtty->tail("statistics"); | |
| 2316 } | |
| 2317 } | |
| 22298 | 2318 #else // COMPILER2 || SHARK || INCLUDE_JVMCI |
| 0 | 2319 |
| 2320 | |
| 2321 // Stubs for C1 only system. | |
| 2322 bool Deoptimization::trap_state_is_recompiled(int trap_state) { | |
| 2323 return false; | |
| 2324 } | |
| 2325 | |
| 2326 const char* Deoptimization::trap_reason_name(int reason) { | |
| 2327 return "unknown"; | |
| 2328 } | |
| 2329 | |
| 2330 void Deoptimization::print_statistics() { | |
| 2331 // no output | |
| 2332 } | |
| 2333 | |
| 2334 void | |
|
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|
2335 Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 0 | 2336 // no udpate |
| 2337 } | |
| 2338 | |
| 2339 int Deoptimization::trap_state_has_reason(int trap_state, int reason) { | |
| 2340 return 0; | |
| 2341 } | |
| 2342 | |
| 2343 void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, | |
| 2344 Bytecodes::Code bc) { | |
| 2345 // no update | |
| 2346 } | |
| 2347 | |
| 2348 const char* Deoptimization::format_trap_state(char* buf, size_t buflen, | |
| 2349 int trap_state) { | |
| 2350 jio_snprintf(buf, buflen, "#%d", trap_state); | |
| 2351 return buf; | |
| 2352 } | |
| 2353 | |
| 22298 | 2354 #endif // COMPILER2 || SHARK || INCLUDE_JVMCI |