| File: | jdk/src/hotspot/share/runtime/deoptimization.cpp |
| Warning: | line 2464, column 5 Value stored to 'len' is never read |
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| 1 | /* |
| 2 | * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved. |
| 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 | * |
| 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | * or visit www.oracle.com if you need additional information or have any |
| 21 | * questions. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include "precompiled.hpp" |
| 26 | #include "jvm.h" |
| 27 | #include "classfile/javaClasses.inline.hpp" |
| 28 | #include "classfile/symbolTable.hpp" |
| 29 | #include "classfile/systemDictionary.hpp" |
| 30 | #include "classfile/vmClasses.hpp" |
| 31 | #include "code/codeCache.hpp" |
| 32 | #include "code/debugInfoRec.hpp" |
| 33 | #include "code/nmethod.hpp" |
| 34 | #include "code/pcDesc.hpp" |
| 35 | #include "code/scopeDesc.hpp" |
| 36 | #include "compiler/compilationPolicy.hpp" |
| 37 | #include "gc/shared/collectedHeap.hpp" |
| 38 | #include "interpreter/bytecode.hpp" |
| 39 | #include "interpreter/interpreter.hpp" |
| 40 | #include "interpreter/oopMapCache.hpp" |
| 41 | #include "memory/allocation.inline.hpp" |
| 42 | #include "memory/oopFactory.hpp" |
| 43 | #include "memory/resourceArea.hpp" |
| 44 | #include "memory/universe.hpp" |
| 45 | #include "oops/constantPool.hpp" |
| 46 | #include "oops/method.hpp" |
| 47 | #include "oops/objArrayKlass.hpp" |
| 48 | #include "oops/objArrayOop.inline.hpp" |
| 49 | #include "oops/oop.inline.hpp" |
| 50 | #include "oops/fieldStreams.inline.hpp" |
| 51 | #include "oops/typeArrayOop.inline.hpp" |
| 52 | #include "oops/verifyOopClosure.hpp" |
| 53 | #include "prims/jvmtiDeferredUpdates.hpp" |
| 54 | #include "prims/jvmtiExport.hpp" |
| 55 | #include "prims/jvmtiThreadState.hpp" |
| 56 | #include "prims/vectorSupport.hpp" |
| 57 | #include "prims/methodHandles.hpp" |
| 58 | #include "runtime/atomic.hpp" |
| 59 | #include "runtime/deoptimization.hpp" |
| 60 | #include "runtime/escapeBarrier.hpp" |
| 61 | #include "runtime/fieldDescriptor.hpp" |
| 62 | #include "runtime/fieldDescriptor.inline.hpp" |
| 63 | #include "runtime/frame.inline.hpp" |
| 64 | #include "runtime/handles.inline.hpp" |
| 65 | #include "runtime/interfaceSupport.inline.hpp" |
| 66 | #include "runtime/jniHandles.inline.hpp" |
| 67 | #include "runtime/keepStackGCProcessed.hpp" |
| 68 | #include "runtime/objectMonitor.inline.hpp" |
| 69 | #include "runtime/osThread.hpp" |
| 70 | #include "runtime/safepointVerifiers.hpp" |
| 71 | #include "runtime/sharedRuntime.hpp" |
| 72 | #include "runtime/signature.hpp" |
| 73 | #include "runtime/stackFrameStream.inline.hpp" |
| 74 | #include "runtime/stackWatermarkSet.hpp" |
| 75 | #include "runtime/stubRoutines.hpp" |
| 76 | #include "runtime/thread.hpp" |
| 77 | #include "runtime/threadSMR.hpp" |
| 78 | #include "runtime/threadWXSetters.inline.hpp" |
| 79 | #include "runtime/vframe.hpp" |
| 80 | #include "runtime/vframeArray.hpp" |
| 81 | #include "runtime/vframe_hp.hpp" |
| 82 | #include "runtime/vmOperations.hpp" |
| 83 | #include "utilities/events.hpp" |
| 84 | #include "utilities/macros.hpp" |
| 85 | #include "utilities/preserveException.hpp" |
| 86 | #include "utilities/xmlstream.hpp" |
| 87 | #if INCLUDE_JFR1 |
| 88 | #include "jfr/jfrEvents.hpp" |
| 89 | #include "jfr/metadata/jfrSerializer.hpp" |
| 90 | #endif |
| 91 | |
| 92 | bool DeoptimizationMarker::_is_active = false; |
| 93 | |
| 94 | Deoptimization::UnrollBlock::UnrollBlock(int size_of_deoptimized_frame, |
| 95 | int caller_adjustment, |
| 96 | int caller_actual_parameters, |
| 97 | int number_of_frames, |
| 98 | intptr_t* frame_sizes, |
| 99 | address* frame_pcs, |
| 100 | BasicType return_type, |
| 101 | int exec_mode) { |
| 102 | _size_of_deoptimized_frame = size_of_deoptimized_frame; |
| 103 | _caller_adjustment = caller_adjustment; |
| 104 | _caller_actual_parameters = caller_actual_parameters; |
| 105 | _number_of_frames = number_of_frames; |
| 106 | _frame_sizes = frame_sizes; |
| 107 | _frame_pcs = frame_pcs; |
| 108 | _register_block = NEW_C_HEAP_ARRAY(intptr_t, RegisterMap::reg_count * 2, mtCompiler)(intptr_t*) (AllocateHeap((RegisterMap::reg_count * 2) * sizeof (intptr_t), mtCompiler)); |
| 109 | _return_type = return_type; |
| 110 | _initial_info = 0; |
| 111 | // PD (x86 only) |
| 112 | _counter_temp = 0; |
| 113 | _unpack_kind = exec_mode; |
| 114 | _sender_sp_temp = 0; |
| 115 | |
| 116 | _total_frame_sizes = size_of_frames(); |
| 117 | assert(exec_mode >= 0 && exec_mode < Unpack_LIMIT, "Unexpected exec_mode")do { if (!(exec_mode >= 0 && exec_mode < Unpack_LIMIT )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 117, "assert(" "exec_mode >= 0 && exec_mode < Unpack_LIMIT" ") failed", "Unexpected exec_mode"); ::breakpoint(); } } while (0); |
| 118 | } |
| 119 | |
| 120 | |
| 121 | Deoptimization::UnrollBlock::~UnrollBlock() { |
| 122 | FREE_C_HEAP_ARRAY(intptr_t, _frame_sizes)FreeHeap((char*)(_frame_sizes)); |
| 123 | FREE_C_HEAP_ARRAY(intptr_t, _frame_pcs)FreeHeap((char*)(_frame_pcs)); |
| 124 | FREE_C_HEAP_ARRAY(intptr_t, _register_block)FreeHeap((char*)(_register_block)); |
| 125 | } |
| 126 | |
| 127 | |
| 128 | intptr_t* Deoptimization::UnrollBlock::value_addr_at(int register_number) const { |
| 129 | assert(register_number < RegisterMap::reg_count, "checking register number")do { if (!(register_number < RegisterMap::reg_count)) { (* g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 129, "assert(" "register_number < RegisterMap::reg_count" ") failed", "checking register number"); ::breakpoint(); } } while (0); |
| 130 | return &_register_block[register_number * 2]; |
| 131 | } |
| 132 | |
| 133 | |
| 134 | |
| 135 | int Deoptimization::UnrollBlock::size_of_frames() const { |
| 136 | // Acount first for the adjustment of the initial frame |
| 137 | int result = _caller_adjustment; |
| 138 | for (int index = 0; index < number_of_frames(); index++) { |
| 139 | result += frame_sizes()[index]; |
| 140 | } |
| 141 | return result; |
| 142 | } |
| 143 | |
| 144 | |
| 145 | void Deoptimization::UnrollBlock::print() { |
| 146 | ResourceMark rm; |
| 147 | stringStream st; |
| 148 | st.print_cr("UnrollBlock"); |
| 149 | st.print_cr(" size_of_deoptimized_frame = %d", _size_of_deoptimized_frame); |
| 150 | st.print( " frame_sizes: "); |
| 151 | for (int index = 0; index < number_of_frames(); index++) { |
| 152 | st.print(INTX_FORMAT"%" "l" "d" " ", frame_sizes()[index]); |
| 153 | } |
| 154 | st.cr(); |
| 155 | tty->print_raw(st.as_string()); |
| 156 | } |
| 157 | |
| 158 | |
| 159 | // In order to make fetch_unroll_info work properly with escape |
| 160 | // analysis, the method was changed from JRT_LEAF to JRT_BLOCK_ENTRY. |
| 161 | // The actual reallocation of previously eliminated objects occurs in realloc_objects, |
| 162 | // which is called from the method fetch_unroll_info_helper below. |
| 163 | JRT_BLOCK_ENTRY(Deoptimization::UnrollBlock*, Deoptimization::fetch_unroll_info(JavaThread* current, int exec_mode))Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info (JavaThread* current, int exec_mode) { do { if (!(current == JavaThread ::current())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 163, "assert(" "current == JavaThread::current()" ") failed" , "Must be"); ::breakpoint(); } } while (0); ; HandleMarkCleaner __hm(current); |
| 164 | // fetch_unroll_info() is called at the beginning of the deoptimization |
| 165 | // handler. Note this fact before we start generating temporary frames |
| 166 | // that can confuse an asynchronous stack walker. This counter is |
| 167 | // decremented at the end of unpack_frames(). |
| 168 | if (TraceDeoptimization) { |
| 169 | tty->print_cr("Deoptimizing thread " INTPTR_FORMAT"0x%016" "l" "x", p2i(current)); |
| 170 | } |
| 171 | current->inc_in_deopt_handler(); |
| 172 | |
| 173 | if (exec_mode == Unpack_exception) { |
| 174 | // When we get here, a callee has thrown an exception into a deoptimized |
| 175 | // frame. That throw might have deferred stack watermark checking until |
| 176 | // after unwinding. So we deal with such deferred requests here. |
| 177 | StackWatermarkSet::after_unwind(current); |
| 178 | } |
| 179 | |
| 180 | return fetch_unroll_info_helper(current, exec_mode); |
| 181 | JRT_END} |
| 182 | |
| 183 | #if COMPILER2_OR_JVMCI1 |
| 184 | #ifndef PRODUCT |
| 185 | // print information about reallocated objects |
| 186 | static void print_objects(JavaThread* deoptee_thread, |
| 187 | GrowableArray<ScopeValue*>* objects, bool realloc_failures) { |
| 188 | ResourceMark rm; |
| 189 | stringStream st; // change to logStream with logging |
| 190 | st.print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT"0x%016" "l" "x", p2i(deoptee_thread)); |
| 191 | fieldDescriptor fd; |
| 192 | |
| 193 | for (int i = 0; i < objects->length(); i++) { |
| 194 | ObjectValue* sv = (ObjectValue*) objects->at(i); |
| 195 | Klass* k = java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()()); |
| 196 | Handle obj = sv->value(); |
| 197 | |
| 198 | st.print(" object <" INTPTR_FORMAT"0x%016" "l" "x" "> of type ", p2i(sv->value()())); |
| 199 | k->print_value_on(&st); |
| 200 | assert(obj.not_null() || realloc_failures, "reallocation was missed")do { if (!(obj.not_null() || realloc_failures)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 200, "assert(" "obj.not_null() || realloc_failures" ") failed" , "reallocation was missed"); ::breakpoint(); } } while (0); |
| 201 | if (obj.is_null()) { |
| 202 | st.print(" allocation failed"); |
| 203 | } else { |
| 204 | st.print(" allocated (" SIZE_FORMAT"%" "l" "u" " bytes)", obj->size() * HeapWordSize); |
| 205 | } |
| 206 | st.cr(); |
| 207 | |
| 208 | if (Verbose && !obj.is_null()) { |
| 209 | k->oop_print_on(obj(), &st); |
| 210 | } |
| 211 | } |
| 212 | tty->print_raw(st.as_string()); |
| 213 | } |
| 214 | #endif |
| 215 | |
| 216 | static bool rematerialize_objects(JavaThread* thread, int exec_mode, CompiledMethod* compiled_method, |
| 217 | frame& deoptee, RegisterMap& map, GrowableArray<compiledVFrame*>* chunk, |
| 218 | bool& deoptimized_objects) { |
| 219 | bool realloc_failures = false; |
| 220 | assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames")do { if (!(chunk->at(0)->scope() != __null)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 220, "assert(" "chunk->at(0)->scope() != __null" ") failed" , "expect only compiled java frames"); ::breakpoint(); } } while (0); |
| 221 | |
| 222 | JavaThread* deoptee_thread = chunk->at(0)->thread(); |
| 223 | assert(exec_mode == Deoptimization::Unpack_none || (deoptee_thread == thread),do { if (!(exec_mode == Deoptimization::Unpack_none || (deoptee_thread == thread))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 224, "assert(" "exec_mode == Deoptimization::Unpack_none || (deoptee_thread == thread)" ") failed", "a frame can only be deoptimized by the owner thread" ); ::breakpoint(); } } while (0) |
| 224 | "a frame can only be deoptimized by the owner thread")do { if (!(exec_mode == Deoptimization::Unpack_none || (deoptee_thread == thread))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 224, "assert(" "exec_mode == Deoptimization::Unpack_none || (deoptee_thread == thread)" ") failed", "a frame can only be deoptimized by the owner thread" ); ::breakpoint(); } } while (0); |
| 225 | |
| 226 | GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); |
| 227 | |
| 228 | // The flag return_oop() indicates call sites which return oop |
| 229 | // in compiled code. Such sites include java method calls, |
| 230 | // runtime calls (for example, used to allocate new objects/arrays |
| 231 | // on slow code path) and any other calls generated in compiled code. |
| 232 | // It is not guaranteed that we can get such information here only |
| 233 | // by analyzing bytecode in deoptimized frames. This is why this flag |
| 234 | // is set during method compilation (see Compile::Process_OopMap_Node()). |
| 235 | // If the previous frame was popped or if we are dispatching an exception, |
| 236 | // we don't have an oop result. |
| 237 | bool save_oop_result = chunk->at(0)->scope()->return_oop() && !thread->popframe_forcing_deopt_reexecution() && (exec_mode == Deoptimization::Unpack_deopt); |
| 238 | Handle return_value; |
| 239 | if (save_oop_result) { |
| 240 | // Reallocation may trigger GC. If deoptimization happened on return from |
| 241 | // call which returns oop we need to save it since it is not in oopmap. |
| 242 | oop result = deoptee.saved_oop_result(&map); |
| 243 | assert(oopDesc::is_oop_or_null(result), "must be oop")do { if (!(oopDesc::is_oop_or_null(result))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 243, "assert(" "oopDesc::is_oop_or_null(result)" ") failed" , "must be oop"); ::breakpoint(); } } while (0); |
| 244 | return_value = Handle(thread, result); |
| 245 | assert(Universe::heap()->is_in_or_null(result), "must be heap pointer")do { if (!(Universe::heap()->is_in_or_null(result))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 245, "assert(" "Universe::heap()->is_in_or_null(result)" ") failed", "must be heap pointer"); ::breakpoint(); } } while (0); |
| 246 | if (TraceDeoptimization) { |
| 247 | tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT"0x%016" "l" "x" " in thread " INTPTR_FORMAT"0x%016" "l" "x", p2i(result), p2i(thread)); |
| 248 | } |
| 249 | } |
| 250 | if (objects != NULL__null) { |
| 251 | if (exec_mode == Deoptimization::Unpack_none) { |
| 252 | assert(thread->thread_state() == _thread_in_vm, "assumption")do { if (!(thread->thread_state() == _thread_in_vm)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 252, "assert(" "thread->thread_state() == _thread_in_vm" ") failed", "assumption"); ::breakpoint(); } } while (0); |
| 253 | JavaThread* THREAD__the_thread__ = thread; // For exception macros. |
| 254 | // Clear pending OOM if reallocation fails and return true indicating allocation failure |
| 255 | realloc_failures = Deoptimization::realloc_objects(thread, &deoptee, &map, objects, CHECK_AND_CLEAR_(true)__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) { (((ThreadShadow*)__the_thread__)->clear_pending_exception ()); return true; } (void)(0); |
| 256 | deoptimized_objects = true; |
| 257 | } else { |
| 258 | JavaThread* current = thread; // For JRT_BLOCK |
| 259 | JRT_BLOCK{ do { if (!(current == JavaThread::current())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 259, "assert(" "current == JavaThread::current()" ") failed" , "Must be"); ::breakpoint(); } } while (0); ThreadInVMfromJava __tiv(current); JavaThread* __the_thread__ = current; VMEntryWrapper __vew; |
| 260 | realloc_failures = Deoptimization::realloc_objects(thread, &deoptee, &map, objects, THREAD__the_thread__); |
| 261 | JRT_END} |
| 262 | } |
| 263 | bool skip_internal = (compiled_method != NULL__null) && !compiled_method->is_compiled_by_jvmci(); |
| 264 | Deoptimization::reassign_fields(&deoptee, &map, objects, realloc_failures, skip_internal); |
| 265 | #ifndef PRODUCT |
| 266 | if (TraceDeoptimization) { |
| 267 | print_objects(deoptee_thread, objects, realloc_failures); |
| 268 | } |
| 269 | #endif |
| 270 | } |
| 271 | if (save_oop_result) { |
| 272 | // Restore result. |
| 273 | deoptee.set_saved_oop_result(&map, return_value()); |
| 274 | } |
| 275 | return realloc_failures; |
| 276 | } |
| 277 | |
| 278 | static void restore_eliminated_locks(JavaThread* thread, GrowableArray<compiledVFrame*>* chunk, bool realloc_failures, |
| 279 | frame& deoptee, int exec_mode, bool& deoptimized_objects) { |
| 280 | JavaThread* deoptee_thread = chunk->at(0)->thread(); |
| 281 | assert(!EscapeBarrier::objs_are_deoptimized(deoptee_thread, deoptee.id()), "must relock just once")do { if (!(!EscapeBarrier::objs_are_deoptimized(deoptee_thread , deoptee.id()))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 281, "assert(" "!EscapeBarrier::objs_are_deoptimized(deoptee_thread, deoptee.id())" ") failed", "must relock just once"); ::breakpoint(); } } while (0); |
| 282 | assert(thread == Thread::current(), "should be")do { if (!(thread == Thread::current())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 282, "assert(" "thread == Thread::current()" ") failed", "should be" ); ::breakpoint(); } } while (0); |
| 283 | HandleMark hm(thread); |
| 284 | #ifndef PRODUCT |
| 285 | bool first = true; |
| 286 | #endif |
| 287 | for (int i = 0; i < chunk->length(); i++) { |
| 288 | compiledVFrame* cvf = chunk->at(i); |
| 289 | assert (cvf->scope() != NULL,"expect only compiled java frames")do { if (!(cvf->scope() != __null)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 289, "assert(" "cvf->scope() != __null" ") failed", "expect only compiled java frames" ); ::breakpoint(); } } while (0); |
| 290 | GrowableArray<MonitorInfo*>* monitors = cvf->monitors(); |
| 291 | if (monitors->is_nonempty()) { |
| 292 | bool relocked = Deoptimization::relock_objects(thread, monitors, deoptee_thread, deoptee, |
| 293 | exec_mode, realloc_failures); |
| 294 | deoptimized_objects = deoptimized_objects || relocked; |
| 295 | #ifndef PRODUCT |
| 296 | if (PrintDeoptimizationDetails) { |
| 297 | ResourceMark rm; |
| 298 | stringStream st; |
| 299 | for (int j = 0; j < monitors->length(); j++) { |
| 300 | MonitorInfo* mi = monitors->at(j); |
| 301 | if (mi->eliminated()) { |
| 302 | if (first) { |
| 303 | first = false; |
| 304 | st.print_cr("RELOCK OBJECTS in thread " INTPTR_FORMAT"0x%016" "l" "x", p2i(thread)); |
| 305 | } |
| 306 | if (exec_mode == Deoptimization::Unpack_none) { |
| 307 | ObjectMonitor* monitor = deoptee_thread->current_waiting_monitor(); |
| 308 | if (monitor != NULL__null && monitor->object() == mi->owner()) { |
| 309 | st.print_cr(" object <" INTPTR_FORMAT"0x%016" "l" "x" "> DEFERRED relocking after wait", p2i(mi->owner())); |
| 310 | continue; |
| 311 | } |
| 312 | } |
| 313 | if (mi->owner_is_scalar_replaced()) { |
| 314 | Klass* k = java_lang_Class::as_Klass(mi->owner_klass()); |
| 315 | st.print_cr(" failed reallocation for klass %s", k->external_name()); |
| 316 | } else { |
| 317 | st.print_cr(" object <" INTPTR_FORMAT"0x%016" "l" "x" "> locked", p2i(mi->owner())); |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | tty->print_raw(st.as_string()); |
| 322 | } |
| 323 | #endif // !PRODUCT |
| 324 | } |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | // Deoptimize objects, that is reallocate and relock them, just before they escape through JVMTI. |
| 329 | // The given vframes cover one physical frame. |
| 330 | bool Deoptimization::deoptimize_objects_internal(JavaThread* thread, GrowableArray<compiledVFrame*>* chunk, |
| 331 | bool& realloc_failures) { |
| 332 | frame deoptee = chunk->at(0)->fr(); |
| 333 | JavaThread* deoptee_thread = chunk->at(0)->thread(); |
| 334 | CompiledMethod* cm = deoptee.cb()->as_compiled_method_or_null(); |
| 335 | RegisterMap map(chunk->at(0)->register_map()); |
| 336 | bool deoptimized_objects = false; |
| 337 | |
| 338 | bool const jvmci_enabled = JVMCI_ONLY(UseJVMCICompiler)UseJVMCICompiler NOT_JVMCI(false); |
| 339 | |
| 340 | // Reallocate the non-escaping objects and restore their fields. |
| 341 | if (jvmci_enabled COMPILER2_PRESENT(|| (DoEscapeAnalysis && EliminateAllocations)|| (DoEscapeAnalysis && EliminateAllocations) || EliminateAutoBox || EnableVectorAggressiveReboxing |
| 342 | || EliminateAutoBox || EnableVectorAggressiveReboxing)|| (DoEscapeAnalysis && EliminateAllocations) || EliminateAutoBox || EnableVectorAggressiveReboxing) { |
| 343 | realloc_failures = rematerialize_objects(thread, Unpack_none, cm, deoptee, map, chunk, deoptimized_objects); |
| 344 | } |
| 345 | |
| 346 | // MonitorInfo structures used in eliminate_locks are not GC safe. |
| 347 | NoSafepointVerifier no_safepoint; |
| 348 | |
| 349 | // Now relock objects if synchronization on them was eliminated. |
| 350 | if (jvmci_enabled COMPILER2_PRESENT(|| ((DoEscapeAnalysis || EliminateNestedLocks) && EliminateLocks))|| ((DoEscapeAnalysis || EliminateNestedLocks) && EliminateLocks )) { |
| 351 | restore_eliminated_locks(thread, chunk, realloc_failures, deoptee, Unpack_none, deoptimized_objects); |
| 352 | } |
| 353 | return deoptimized_objects; |
| 354 | } |
| 355 | #endif // COMPILER2_OR_JVMCI |
| 356 | |
| 357 | // This is factored, since it is both called from a JRT_LEAF (deoptimization) and a JRT_ENTRY (uncommon_trap) |
| 358 | Deoptimization::UnrollBlock* Deoptimization::fetch_unroll_info_helper(JavaThread* current, int exec_mode) { |
| 359 | // When we get here we are about to unwind the deoptee frame. In order to |
| 360 | // catch not yet safe to use frames, the following stack watermark barrier |
| 361 | // poll will make such frames safe to use. |
| 362 | StackWatermarkSet::before_unwind(current); |
| 363 | |
| 364 | // Note: there is a safepoint safety issue here. No matter whether we enter |
| 365 | // via vanilla deopt or uncommon trap we MUST NOT stop at a safepoint once |
| 366 | // the vframeArray is created. |
| 367 | // |
| 368 | |
| 369 | // Allocate our special deoptimization ResourceMark |
| 370 | DeoptResourceMark* dmark = new DeoptResourceMark(current); |
| 371 | assert(current->deopt_mark() == NULL, "Pending deopt!")do { if (!(current->deopt_mark() == __null)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 371, "assert(" "current->deopt_mark() == __null" ") failed" , "Pending deopt!"); ::breakpoint(); } } while (0); |
| 372 | current->set_deopt_mark(dmark); |
| 373 | |
| 374 | frame stub_frame = current->last_frame(); // Makes stack walkable as side effect |
| 375 | RegisterMap map(current, true); |
| 376 | RegisterMap dummy_map(current, false); |
| 377 | // Now get the deoptee with a valid map |
| 378 | frame deoptee = stub_frame.sender(&map); |
| 379 | // Set the deoptee nmethod |
| 380 | assert(current->deopt_compiled_method() == NULL, "Pending deopt!")do { if (!(current->deopt_compiled_method() == __null)) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 380, "assert(" "current->deopt_compiled_method() == __null" ") failed", "Pending deopt!"); ::breakpoint(); } } while (0); |
| 381 | CompiledMethod* cm = deoptee.cb()->as_compiled_method_or_null(); |
| 382 | current->set_deopt_compiled_method(cm); |
| 383 | |
| 384 | if (VerifyStack) { |
| 385 | current->validate_frame_layout(); |
| 386 | } |
| 387 | |
| 388 | // Create a growable array of VFrames where each VFrame represents an inlined |
| 389 | // Java frame. This storage is allocated with the usual system arena. |
| 390 | assert(deoptee.is_compiled_frame(), "Wrong frame type")do { if (!(deoptee.is_compiled_frame())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 390, "assert(" "deoptee.is_compiled_frame()" ") failed", "Wrong frame type" ); ::breakpoint(); } } while (0); |
| 391 | GrowableArray<compiledVFrame*>* chunk = new GrowableArray<compiledVFrame*>(10); |
| 392 | vframe* vf = vframe::new_vframe(&deoptee, &map, current); |
| 393 | while (!vf->is_top()) { |
| 394 | assert(vf->is_compiled_frame(), "Wrong frame type")do { if (!(vf->is_compiled_frame())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 394, "assert(" "vf->is_compiled_frame()" ") failed", "Wrong frame type" ); ::breakpoint(); } } while (0); |
| 395 | chunk->push(compiledVFrame::cast(vf)); |
| 396 | vf = vf->sender(); |
| 397 | } |
| 398 | assert(vf->is_compiled_frame(), "Wrong frame type")do { if (!(vf->is_compiled_frame())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 398, "assert(" "vf->is_compiled_frame()" ") failed", "Wrong frame type" ); ::breakpoint(); } } while (0); |
| 399 | chunk->push(compiledVFrame::cast(vf)); |
| 400 | |
| 401 | bool realloc_failures = false; |
| 402 | |
| 403 | #if COMPILER2_OR_JVMCI1 |
| 404 | bool const jvmci_enabled = JVMCI_ONLY(EnableJVMCI)EnableJVMCI NOT_JVMCI(false); |
| 405 | |
| 406 | // Reallocate the non-escaping objects and restore their fields. Then |
| 407 | // relock objects if synchronization on them was eliminated. |
| 408 | if (jvmci_enabled COMPILER2_PRESENT( || (DoEscapeAnalysis && EliminateAllocations)|| (DoEscapeAnalysis && EliminateAllocations) || EliminateAutoBox || EnableVectorAggressiveReboxing |
| 409 | || EliminateAutoBox || EnableVectorAggressiveReboxing )|| (DoEscapeAnalysis && EliminateAllocations) || EliminateAutoBox || EnableVectorAggressiveReboxing) { |
| 410 | bool unused; |
| 411 | realloc_failures = rematerialize_objects(current, exec_mode, cm, deoptee, map, chunk, unused); |
| 412 | } |
| 413 | #endif // COMPILER2_OR_JVMCI |
| 414 | |
| 415 | // Ensure that no safepoint is taken after pointers have been stored |
| 416 | // in fields of rematerialized objects. If a safepoint occurs from here on |
| 417 | // out the java state residing in the vframeArray will be missed. |
| 418 | // Locks may be rebaised in a safepoint. |
| 419 | NoSafepointVerifier no_safepoint; |
| 420 | |
| 421 | #if COMPILER2_OR_JVMCI1 |
| 422 | if ((jvmci_enabled COMPILER2_PRESENT( || ((DoEscapeAnalysis || EliminateNestedLocks) && EliminateLocks) )|| ((DoEscapeAnalysis || EliminateNestedLocks) && EliminateLocks )) |
| 423 | && !EscapeBarrier::objs_are_deoptimized(current, deoptee.id())) { |
| 424 | bool unused; |
| 425 | restore_eliminated_locks(current, chunk, realloc_failures, deoptee, exec_mode, unused); |
| 426 | } |
| 427 | #endif // COMPILER2_OR_JVMCI |
| 428 | |
| 429 | ScopeDesc* trap_scope = chunk->at(0)->scope(); |
| 430 | Handle exceptionObject; |
| 431 | if (trap_scope->rethrow_exception()) { |
| 432 | if (PrintDeoptimizationDetails) { |
| 433 | 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()); |
| 434 | } |
| 435 | GrowableArray<ScopeValue*>* expressions = trap_scope->expressions(); |
| 436 | guarantee(expressions != NULL && expressions->length() > 0, "must have exception to throw")do { if (!(expressions != __null && expressions->length () > 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 436, "guarantee(" "expressions != NULL && expressions->length() > 0" ") failed", "must have exception to throw"); ::breakpoint(); } } while (0); |
| 437 | ScopeValue* topOfStack = expressions->top(); |
| 438 | exceptionObject = StackValue::create_stack_value(&deoptee, &map, topOfStack)->get_obj(); |
| 439 | guarantee(exceptionObject() != NULL, "exception oop can not be null")do { if (!(exceptionObject() != __null)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 439, "guarantee(" "exceptionObject() != NULL" ") failed", "exception oop can not be null" ); ::breakpoint(); } } while (0); |
| 440 | } |
| 441 | |
| 442 | vframeArray* array = create_vframeArray(current, deoptee, &map, chunk, realloc_failures); |
| 443 | #if COMPILER2_OR_JVMCI1 |
| 444 | if (realloc_failures) { |
| 445 | pop_frames_failed_reallocs(current, array); |
| 446 | } |
| 447 | #endif |
| 448 | |
| 449 | assert(current->vframe_array_head() == NULL, "Pending deopt!")do { if (!(current->vframe_array_head() == __null)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 449, "assert(" "current->vframe_array_head() == __null" ") failed" , "Pending deopt!"); ::breakpoint(); } } while (0); |
| 450 | current->set_vframe_array_head(array); |
| 451 | |
| 452 | // Now that the vframeArray has been created if we have any deferred local writes |
| 453 | // added by jvmti then we can free up that structure as the data is now in the |
| 454 | // vframeArray |
| 455 | |
| 456 | JvmtiDeferredUpdates::delete_updates_for_frame(current, array->original().id()); |
| 457 | |
| 458 | // Compute the caller frame based on the sender sp of stub_frame and stored frame sizes info. |
| 459 | CodeBlob* cb = stub_frame.cb(); |
| 460 | // Verify we have the right vframeArray |
| 461 | assert(cb->frame_size() >= 0, "Unexpected frame size")do { if (!(cb->frame_size() >= 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 461, "assert(" "cb->frame_size() >= 0" ") failed", "Unexpected frame size" ); ::breakpoint(); } } while (0); |
| 462 | intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size(); |
| 463 | |
| 464 | // If the deopt call site is a MethodHandle invoke call site we have |
| 465 | // to adjust the unpack_sp. |
| 466 | nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null(); |
| 467 | if (deoptee_nm != NULL__null && deoptee_nm->is_method_handle_return(deoptee.pc())) |
| 468 | unpack_sp = deoptee.unextended_sp(); |
| 469 | |
| 470 | #ifdef ASSERT1 |
| 471 | assert(cb->is_deoptimization_stub() ||do { if (!(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub () || strcmp("Stub<DeoptimizationStub.deoptimizationHandler>" , cb->name()) == 0 || strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>" , cb->name()) == 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 475, "assert(" "cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub() || strcmp(\"Stub<DeoptimizationStub.deoptimizationHandler>\", cb->name()) == 0 || strcmp(\"Stub<UncommonTrapStub.uncommonTrapHandler>\", cb->name()) == 0" ") failed", "unexpected code blob: %s", cb->name()); ::breakpoint (); } } while (0) |
| 472 | cb->is_uncommon_trap_stub() ||do { if (!(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub () || strcmp("Stub<DeoptimizationStub.deoptimizationHandler>" , cb->name()) == 0 || strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>" , cb->name()) == 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 475, "assert(" "cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub() || strcmp(\"Stub<DeoptimizationStub.deoptimizationHandler>\", cb->name()) == 0 || strcmp(\"Stub<UncommonTrapStub.uncommonTrapHandler>\", cb->name()) == 0" ") failed", "unexpected code blob: %s", cb->name()); ::breakpoint (); } } while (0) |
| 473 | strcmp("Stub<DeoptimizationStub.deoptimizationHandler>", cb->name()) == 0 ||do { if (!(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub () || strcmp("Stub<DeoptimizationStub.deoptimizationHandler>" , cb->name()) == 0 || strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>" , cb->name()) == 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 475, "assert(" "cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub() || strcmp(\"Stub<DeoptimizationStub.deoptimizationHandler>\", cb->name()) == 0 || strcmp(\"Stub<UncommonTrapStub.uncommonTrapHandler>\", cb->name()) == 0" ") failed", "unexpected code blob: %s", cb->name()); ::breakpoint (); } } while (0) |
| 474 | strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>", cb->name()) == 0,do { if (!(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub () || strcmp("Stub<DeoptimizationStub.deoptimizationHandler>" , cb->name()) == 0 || strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>" , cb->name()) == 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 475, "assert(" "cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub() || strcmp(\"Stub<DeoptimizationStub.deoptimizationHandler>\", cb->name()) == 0 || strcmp(\"Stub<UncommonTrapStub.uncommonTrapHandler>\", cb->name()) == 0" ") failed", "unexpected code blob: %s", cb->name()); ::breakpoint (); } } while (0) |
| 475 | "unexpected code blob: %s", cb->name())do { if (!(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub () || strcmp("Stub<DeoptimizationStub.deoptimizationHandler>" , cb->name()) == 0 || strcmp("Stub<UncommonTrapStub.uncommonTrapHandler>" , cb->name()) == 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 475, "assert(" "cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub() || strcmp(\"Stub<DeoptimizationStub.deoptimizationHandler>\", cb->name()) == 0 || strcmp(\"Stub<UncommonTrapStub.uncommonTrapHandler>\", cb->name()) == 0" ") failed", "unexpected code blob: %s", cb->name()); ::breakpoint (); } } while (0); |
| 476 | #endif |
| 477 | |
| 478 | // This is a guarantee instead of an assert because if vframe doesn't match |
| 479 | // we will unpack the wrong deoptimized frame and wind up in strange places |
| 480 | // where it will be very difficult to figure out what went wrong. Better |
| 481 | // to die an early death here than some very obscure death later when the |
| 482 | // trail is cold. |
| 483 | // Note: on ia64 this guarantee can be fooled by frames with no memory stack |
| 484 | // in that it will fail to detect a problem when there is one. This needs |
| 485 | // more work in tiger timeframe. |
| 486 | guarantee(array->unextended_sp() == unpack_sp, "vframe_array_head must contain the vframeArray to unpack")do { if (!(array->unextended_sp() == unpack_sp)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 486, "guarantee(" "array->unextended_sp() == unpack_sp" ") failed" , "vframe_array_head must contain the vframeArray to unpack") ; ::breakpoint(); } } while (0); |
| 487 | |
| 488 | int number_of_frames = array->frames(); |
| 489 | |
| 490 | // Compute the vframes' sizes. Note that frame_sizes[] entries are ordered from outermost to innermost |
| 491 | // virtual activation, which is the reverse of the elements in the vframes array. |
| 492 | intptr_t* frame_sizes = NEW_C_HEAP_ARRAY(intptr_t, number_of_frames, mtCompiler)(intptr_t*) (AllocateHeap((number_of_frames) * sizeof(intptr_t ), mtCompiler)); |
| 493 | // +1 because we always have an interpreter return address for the final slot. |
| 494 | address* frame_pcs = NEW_C_HEAP_ARRAY(address, number_of_frames + 1, mtCompiler)(address*) (AllocateHeap((number_of_frames + 1) * sizeof(address ), mtCompiler)); |
| 495 | int popframe_extra_args = 0; |
| 496 | // Create an interpreter return address for the stub to use as its return |
| 497 | // address so the skeletal frames are perfectly walkable |
| 498 | frame_pcs[number_of_frames] = Interpreter::deopt_entry(vtos, 0); |
| 499 | |
| 500 | // PopFrame requires that the preserved incoming arguments from the recently-popped topmost |
| 501 | // activation be put back on the expression stack of the caller for reexecution |
| 502 | if (JvmtiExport::can_pop_frame() && current->popframe_forcing_deopt_reexecution()) { |
| 503 | popframe_extra_args = in_words(current->popframe_preserved_args_size_in_words()); |
| 504 | } |
| 505 | |
| 506 | // Find the current pc for sender of the deoptee. Since the sender may have been deoptimized |
| 507 | // itself since the deoptee vframeArray was created we must get a fresh value of the pc rather |
| 508 | // than simply use array->sender.pc(). This requires us to walk the current set of frames |
| 509 | // |
| 510 | frame deopt_sender = stub_frame.sender(&dummy_map); // First is the deoptee frame |
| 511 | deopt_sender = deopt_sender.sender(&dummy_map); // Now deoptee caller |
| 512 | |
| 513 | // It's possible that the number of parameters at the call site is |
| 514 | // different than number of arguments in the callee when method |
| 515 | // handles are used. If the caller is interpreted get the real |
| 516 | // value so that the proper amount of space can be added to it's |
| 517 | // frame. |
| 518 | bool caller_was_method_handle = false; |
| 519 | if (deopt_sender.is_interpreted_frame()) { |
| 520 | methodHandle method(current, deopt_sender.interpreter_frame_method()); |
| 521 | Bytecode_invoke cur = Bytecode_invoke_check(method, deopt_sender.interpreter_frame_bci()); |
| 522 | if (cur.is_invokedynamic() || cur.is_invokehandle()) { |
| 523 | // Method handle invokes may involve fairly arbitrary chains of |
| 524 | // calls so it's impossible to know how much actual space the |
| 525 | // caller has for locals. |
| 526 | caller_was_method_handle = true; |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | // |
| 531 | // frame_sizes/frame_pcs[0] oldest frame (int or c2i) |
| 532 | // frame_sizes/frame_pcs[1] next oldest frame (int) |
| 533 | // frame_sizes/frame_pcs[n] youngest frame (int) |
| 534 | // |
| 535 | // Now a pc in frame_pcs is actually the return address to the frame's caller (a frame |
| 536 | // owns the space for the return address to it's caller). Confusing ain't it. |
| 537 | // |
| 538 | // The vframe array can address vframes with indices running from |
| 539 | // 0.._frames-1. Index 0 is the youngest frame and _frame - 1 is the oldest (root) frame. |
| 540 | // When we create the skeletal frames we need the oldest frame to be in the zero slot |
| 541 | // in the frame_sizes/frame_pcs so the assembly code can do a trivial walk. |
| 542 | // so things look a little strange in this loop. |
| 543 | // |
| 544 | int callee_parameters = 0; |
| 545 | int callee_locals = 0; |
| 546 | for (int index = 0; index < array->frames(); index++ ) { |
| 547 | // frame[number_of_frames - 1 ] = on_stack_size(youngest) |
| 548 | // frame[number_of_frames - 2 ] = on_stack_size(sender(youngest)) |
| 549 | // frame[number_of_frames - 3 ] = on_stack_size(sender(sender(youngest))) |
| 550 | frame_sizes[number_of_frames - 1 - index] = BytesPerWord * array->element(index)->on_stack_size(callee_parameters, |
| 551 | callee_locals, |
| 552 | index == 0, |
| 553 | popframe_extra_args); |
| 554 | // This pc doesn't have to be perfect just good enough to identify the frame |
| 555 | // as interpreted so the skeleton frame will be walkable |
| 556 | // The correct pc will be set when the skeleton frame is completely filled out |
| 557 | // The final pc we store in the loop is wrong and will be overwritten below |
| 558 | frame_pcs[number_of_frames - 1 - index ] = Interpreter::deopt_entry(vtos, 0) - frame::pc_return_offset; |
| 559 | |
| 560 | callee_parameters = array->element(index)->method()->size_of_parameters(); |
| 561 | callee_locals = array->element(index)->method()->max_locals(); |
| 562 | popframe_extra_args = 0; |
| 563 | } |
| 564 | |
| 565 | // Compute whether the root vframe returns a float or double value. |
| 566 | BasicType return_type; |
| 567 | { |
| 568 | methodHandle method(current, array->element(0)->method()); |
| 569 | Bytecode_invoke invoke = Bytecode_invoke_check(method, array->element(0)->bci()); |
| 570 | return_type = invoke.is_valid() ? invoke.result_type() : T_ILLEGAL; |
| 571 | } |
| 572 | |
| 573 | // Compute information for handling adapters and adjusting the frame size of the caller. |
| 574 | int caller_adjustment = 0; |
| 575 | |
| 576 | // Compute the amount the oldest interpreter frame will have to adjust |
| 577 | // its caller's stack by. If the caller is a compiled frame then |
| 578 | // we pretend that the callee has no parameters so that the |
| 579 | // extension counts for the full amount of locals and not just |
| 580 | // locals-parms. This is because without a c2i adapter the parm |
| 581 | // area as created by the compiled frame will not be usable by |
| 582 | // the interpreter. (Depending on the calling convention there |
| 583 | // may not even be enough space). |
| 584 | |
| 585 | // QQQ I'd rather see this pushed down into last_frame_adjust |
| 586 | // and have it take the sender (aka caller). |
| 587 | |
| 588 | if (deopt_sender.is_compiled_caller() || caller_was_method_handle) { |
| 589 | caller_adjustment = last_frame_adjust(0, callee_locals); |
| 590 | } else if (callee_locals > callee_parameters) { |
| 591 | // The caller frame may need extending to accommodate |
| 592 | // non-parameter locals of the first unpacked interpreted frame. |
| 593 | // Compute that adjustment. |
| 594 | caller_adjustment = last_frame_adjust(callee_parameters, callee_locals); |
| 595 | } |
| 596 | |
| 597 | // If the sender is deoptimized the we must retrieve the address of the handler |
| 598 | // since the frame will "magically" show the original pc before the deopt |
| 599 | // and we'd undo the deopt. |
| 600 | |
| 601 | frame_pcs[0] = deopt_sender.raw_pc(); |
| 602 | |
| 603 | assert(CodeCache::find_blob_unsafe(frame_pcs[0]) != NULL, "bad pc")do { if (!(CodeCache::find_blob_unsafe(frame_pcs[0]) != __null )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 603, "assert(" "CodeCache::find_blob_unsafe(frame_pcs[0]) != __null" ") failed", "bad pc"); ::breakpoint(); } } while (0); |
| 604 | |
| 605 | #if INCLUDE_JVMCI1 |
| 606 | if (exceptionObject() != NULL__null) { |
| 607 | current->set_exception_oop(exceptionObject()); |
| 608 | exec_mode = Unpack_exception; |
| 609 | } |
| 610 | #endif |
| 611 | |
| 612 | if (current->frames_to_pop_failed_realloc() > 0 && exec_mode != Unpack_uncommon_trap) { |
| 613 | assert(current->has_pending_exception(), "should have thrown OOME")do { if (!(current->has_pending_exception())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 613, "assert(" "current->has_pending_exception()" ") failed" , "should have thrown OOME"); ::breakpoint(); } } while (0); |
| 614 | current->set_exception_oop(current->pending_exception()); |
| 615 | current->clear_pending_exception(); |
| 616 | exec_mode = Unpack_exception; |
| 617 | } |
| 618 | |
| 619 | #if INCLUDE_JVMCI1 |
| 620 | if (current->frames_to_pop_failed_realloc() > 0) { |
| 621 | current->set_pending_monitorenter(false); |
| 622 | } |
| 623 | #endif |
| 624 | |
| 625 | UnrollBlock* info = new UnrollBlock(array->frame_size() * BytesPerWord, |
| 626 | caller_adjustment * BytesPerWord, |
| 627 | caller_was_method_handle ? 0 : callee_parameters, |
| 628 | number_of_frames, |
| 629 | frame_sizes, |
| 630 | frame_pcs, |
| 631 | return_type, |
| 632 | exec_mode); |
| 633 | // On some platforms, we need a way to pass some platform dependent |
| 634 | // information to the unpacking code so the skeletal frames come out |
| 635 | // correct (initial fp value, unextended sp, ...) |
| 636 | info->set_initial_info((intptr_t) array->sender().initial_deoptimization_info()); |
| 637 | |
| 638 | if (array->frames() > 1) { |
| 639 | if (VerifyStack && TraceDeoptimization) { |
| 640 | tty->print_cr("Deoptimizing method containing inlining"); |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | array->set_unroll_block(info); |
| 645 | return info; |
| 646 | } |
| 647 | |
| 648 | // Called to cleanup deoptimization data structures in normal case |
| 649 | // after unpacking to stack and when stack overflow error occurs |
| 650 | void Deoptimization::cleanup_deopt_info(JavaThread *thread, |
| 651 | vframeArray *array) { |
| 652 | |
| 653 | // Get array if coming from exception |
| 654 | if (array == NULL__null) { |
| 655 | array = thread->vframe_array_head(); |
| 656 | } |
| 657 | thread->set_vframe_array_head(NULL__null); |
| 658 | |
| 659 | // Free the previous UnrollBlock |
| 660 | vframeArray* old_array = thread->vframe_array_last(); |
| 661 | thread->set_vframe_array_last(array); |
| 662 | |
| 663 | if (old_array != NULL__null) { |
| 664 | UnrollBlock* old_info = old_array->unroll_block(); |
| 665 | old_array->set_unroll_block(NULL__null); |
| 666 | delete old_info; |
| 667 | delete old_array; |
| 668 | } |
| 669 | |
| 670 | // Deallocate any resource creating in this routine and any ResourceObjs allocated |
| 671 | // inside the vframeArray (StackValueCollections) |
| 672 | |
| 673 | delete thread->deopt_mark(); |
| 674 | thread->set_deopt_mark(NULL__null); |
| 675 | thread->set_deopt_compiled_method(NULL__null); |
| 676 | |
| 677 | |
| 678 | if (JvmtiExport::can_pop_frame()) { |
| 679 | // Regardless of whether we entered this routine with the pending |
| 680 | // popframe condition bit set, we should always clear it now |
| 681 | thread->clear_popframe_condition(); |
| 682 | } |
| 683 | |
| 684 | // unpack_frames() is called at the end of the deoptimization handler |
| 685 | // and (in C2) at the end of the uncommon trap handler. Note this fact |
| 686 | // so that an asynchronous stack walker can work again. This counter is |
| 687 | // incremented at the beginning of fetch_unroll_info() and (in C2) at |
| 688 | // the beginning of uncommon_trap(). |
| 689 | thread->dec_in_deopt_handler(); |
| 690 | } |
| 691 | |
| 692 | // Moved from cpu directories because none of the cpus has callee save values. |
| 693 | // If a cpu implements callee save values, move this to deoptimization_<cpu>.cpp. |
| 694 | void Deoptimization::unwind_callee_save_values(frame* f, vframeArray* vframe_array) { |
| 695 | |
| 696 | // This code is sort of the equivalent of C2IAdapter::setup_stack_frame back in |
| 697 | // the days we had adapter frames. When we deoptimize a situation where a |
| 698 | // compiled caller calls a compiled caller will have registers it expects |
| 699 | // to survive the call to the callee. If we deoptimize the callee the only |
| 700 | // way we can restore these registers is to have the oldest interpreter |
| 701 | // frame that we create restore these values. That is what this routine |
| 702 | // will accomplish. |
| 703 | |
| 704 | // At the moment we have modified c2 to not have any callee save registers |
| 705 | // so this problem does not exist and this routine is just a place holder. |
| 706 | |
| 707 | assert(f->is_interpreted_frame(), "must be interpreted")do { if (!(f->is_interpreted_frame())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 707, "assert(" "f->is_interpreted_frame()" ") failed", "must be interpreted" ); ::breakpoint(); } } while (0); |
| 708 | } |
| 709 | |
| 710 | // Return BasicType of value being returned |
| 711 | JRT_LEAF(BasicType, Deoptimization::unpack_frames(JavaThread* thread, int exec_mode))BasicType Deoptimization::unpack_frames(JavaThread* thread, int exec_mode) { NoHandleMark __hm; ; os::verify_stack_alignment (); NoSafepointVerifier __nsv; |
| 712 | |
| 713 | // We are already active in the special DeoptResourceMark any ResourceObj's we |
| 714 | // allocate will be freed at the end of the routine. |
| 715 | |
| 716 | // JRT_LEAF methods don't normally allocate handles and there is a |
| 717 | // NoHandleMark to enforce that. It is actually safe to use Handles |
| 718 | // in a JRT_LEAF method, and sometimes desirable, but to do so we |
| 719 | // must use ResetNoHandleMark to bypass the NoHandleMark, and |
| 720 | // then use a HandleMark to ensure any Handles we do create are |
| 721 | // cleaned up in this scope. |
| 722 | ResetNoHandleMark rnhm; |
| 723 | HandleMark hm(thread); |
| 724 | |
| 725 | frame stub_frame = thread->last_frame(); |
| 726 | |
| 727 | // Since the frame to unpack is the top frame of this thread, the vframe_array_head |
| 728 | // must point to the vframeArray for the unpack frame. |
| 729 | vframeArray* array = thread->vframe_array_head(); |
| 730 | |
| 731 | #ifndef PRODUCT |
| 732 | if (TraceDeoptimization) { |
| 733 | tty->print_cr("DEOPT UNPACKING thread " INTPTR_FORMAT"0x%016" "l" "x" " vframeArray " INTPTR_FORMAT"0x%016" "l" "x" " mode %d", |
| 734 | p2i(thread), p2i(array), exec_mode); |
| 735 | } |
| 736 | #endif |
| 737 | Events::log_deopt_message(thread, "DEOPT UNPACKING pc=" INTPTR_FORMAT"0x%016" "l" "x" " sp=" INTPTR_FORMAT"0x%016" "l" "x" " mode %d", |
| 738 | p2i(stub_frame.pc()), p2i(stub_frame.sp()), exec_mode); |
| 739 | |
| 740 | UnrollBlock* info = array->unroll_block(); |
| 741 | |
| 742 | // We set the last_Java frame. But the stack isn't really parsable here. So we |
| 743 | // clear it to make sure JFR understands not to try and walk stacks from events |
| 744 | // in here. |
| 745 | intptr_t* sp = thread->frame_anchor()->last_Java_sp(); |
| 746 | thread->frame_anchor()->set_last_Java_sp(NULL__null); |
| 747 | |
| 748 | // Unpack the interpreter frames and any adapter frame (c2 only) we might create. |
| 749 | array->unpack_to_stack(stub_frame, exec_mode, info->caller_actual_parameters()); |
| 750 | |
| 751 | thread->frame_anchor()->set_last_Java_sp(sp); |
| 752 | |
| 753 | BasicType bt = info->return_type(); |
| 754 | |
| 755 | // If we have an exception pending, claim that the return type is an oop |
| 756 | // so the deopt_blob does not overwrite the exception_oop. |
| 757 | |
| 758 | if (exec_mode == Unpack_exception) |
| 759 | bt = T_OBJECT; |
| 760 | |
| 761 | // Cleanup thread deopt data |
| 762 | cleanup_deopt_info(thread, array); |
| 763 | |
| 764 | #ifndef PRODUCT |
| 765 | if (VerifyStack) { |
| 766 | ResourceMark res_mark; |
| 767 | // Clear pending exception to not break verification code (restored afterwards) |
| 768 | PreserveExceptionMark pm(thread); |
| 769 | |
| 770 | thread->validate_frame_layout(); |
| 771 | |
| 772 | // Verify that the just-unpacked frames match the interpreter's |
| 773 | // notions of expression stack and locals |
| 774 | vframeArray* cur_array = thread->vframe_array_last(); |
| 775 | RegisterMap rm(thread, false); |
| 776 | rm.set_include_argument_oops(false); |
| 777 | bool is_top_frame = true; |
| 778 | int callee_size_of_parameters = 0; |
| 779 | int callee_max_locals = 0; |
| 780 | for (int i = 0; i < cur_array->frames(); i++) { |
| 781 | vframeArrayElement* el = cur_array->element(i); |
| 782 | frame* iframe = el->iframe(); |
| 783 | guarantee(iframe->is_interpreted_frame(), "Wrong frame type")do { if (!(iframe->is_interpreted_frame())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 783, "guarantee(" "iframe->is_interpreted_frame()" ") failed" , "Wrong frame type"); ::breakpoint(); } } while (0); |
| 784 | |
| 785 | // Get the oop map for this bci |
| 786 | InterpreterOopMap mask; |
| 787 | int cur_invoke_parameter_size = 0; |
| 788 | bool try_next_mask = false; |
| 789 | int next_mask_expression_stack_size = -1; |
| 790 | int top_frame_expression_stack_adjustment = 0; |
| 791 | methodHandle mh(thread, iframe->interpreter_frame_method()); |
| 792 | OopMapCache::compute_one_oop_map(mh, iframe->interpreter_frame_bci(), &mask); |
| 793 | BytecodeStream str(mh, iframe->interpreter_frame_bci()); |
| 794 | int max_bci = mh->code_size(); |
| 795 | // Get to the next bytecode if possible |
| 796 | assert(str.bci() < max_bci, "bci in interpreter frame out of bounds")do { if (!(str.bci() < max_bci)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 796, "assert(" "str.bci() < max_bci" ") failed", "bci in interpreter frame out of bounds" ); ::breakpoint(); } } while (0); |
| 797 | // Check to see if we can grab the number of outgoing arguments |
| 798 | // at an uncommon trap for an invoke (where the compiler |
| 799 | // generates debug info before the invoke has executed) |
| 800 | Bytecodes::Code cur_code = str.next(); |
| 801 | Bytecodes::Code next_code = Bytecodes::_shouldnotreachhere; |
| 802 | if (Bytecodes::is_invoke(cur_code)) { |
| 803 | Bytecode_invoke invoke(mh, iframe->interpreter_frame_bci()); |
| 804 | cur_invoke_parameter_size = invoke.size_of_parameters(); |
| 805 | if (i != 0 && !invoke.is_invokedynamic() && MethodHandles::has_member_arg(invoke.klass(), invoke.name())) { |
| 806 | callee_size_of_parameters++; |
| 807 | } |
| 808 | } |
| 809 | if (str.bci() < max_bci) { |
| 810 | next_code = str.next(); |
| 811 | if (next_code >= 0) { |
| 812 | // The interpreter oop map generator reports results before |
| 813 | // the current bytecode has executed except in the case of |
| 814 | // calls. It seems to be hard to tell whether the compiler |
| 815 | // has emitted debug information matching the "state before" |
| 816 | // a given bytecode or the state after, so we try both |
| 817 | if (!Bytecodes::is_invoke(cur_code) && cur_code != Bytecodes::_athrow) { |
| 818 | // Get expression stack size for the next bytecode |
| 819 | InterpreterOopMap next_mask; |
| 820 | OopMapCache::compute_one_oop_map(mh, str.bci(), &next_mask); |
| 821 | next_mask_expression_stack_size = next_mask.expression_stack_size(); |
| 822 | if (Bytecodes::is_invoke(next_code)) { |
| 823 | Bytecode_invoke invoke(mh, str.bci()); |
| 824 | next_mask_expression_stack_size += invoke.size_of_parameters(); |
| 825 | } |
| 826 | // Need to subtract off the size of the result type of |
| 827 | // the bytecode because this is not described in the |
| 828 | // debug info but returned to the interpreter in the TOS |
| 829 | // caching register |
| 830 | BasicType bytecode_result_type = Bytecodes::result_type(cur_code); |
| 831 | if (bytecode_result_type != T_ILLEGAL) { |
| 832 | top_frame_expression_stack_adjustment = type2size[bytecode_result_type]; |
| 833 | } |
| 834 | assert(top_frame_expression_stack_adjustment >= 0, "stack adjustment must be positive")do { if (!(top_frame_expression_stack_adjustment >= 0)) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 834, "assert(" "top_frame_expression_stack_adjustment >= 0" ") failed", "stack adjustment must be positive"); ::breakpoint (); } } while (0); |
| 835 | try_next_mask = true; |
| 836 | } |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | // Verify stack depth and oops in frame |
| 841 | // This assertion may be dependent on the platform we're running on and may need modification (tested on x86 and sparc) |
| 842 | if (!( |
| 843 | /* SPARC */ |
| 844 | (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_size_of_parameters) || |
| 845 | /* x86 */ |
| 846 | (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + callee_max_locals) || |
| 847 | (try_next_mask && |
| 848 | (iframe->interpreter_frame_expression_stack_size() == (next_mask_expression_stack_size - |
| 849 | top_frame_expression_stack_adjustment))) || |
| 850 | (is_top_frame && (exec_mode == Unpack_exception) && iframe->interpreter_frame_expression_stack_size() == 0) || |
| 851 | (is_top_frame && (exec_mode == Unpack_uncommon_trap || exec_mode == Unpack_reexecute || el->should_reexecute()) && |
| 852 | (iframe->interpreter_frame_expression_stack_size() == mask.expression_stack_size() + cur_invoke_parameter_size)) |
| 853 | )) { |
| 854 | { |
| 855 | // Print out some information that will help us debug the problem |
| 856 | tty->print_cr("Wrong number of expression stack elements during deoptimization"); |
| 857 | tty->print_cr(" Error occurred while verifying frame %d (0..%d, 0 is topmost)", i, cur_array->frames() - 1); |
| 858 | tty->print_cr(" Current code %s", Bytecodes::name(cur_code)); |
| 859 | if (try_next_mask) { |
| 860 | tty->print_cr(" Next code %s", Bytecodes::name(next_code)); |
| 861 | } |
| 862 | tty->print_cr(" Fabricated interpreter frame had %d expression stack elements", |
| 863 | iframe->interpreter_frame_expression_stack_size()); |
| 864 | tty->print_cr(" Interpreter oop map had %d expression stack elements", mask.expression_stack_size()); |
| 865 | tty->print_cr(" try_next_mask = %d", try_next_mask); |
| 866 | tty->print_cr(" next_mask_expression_stack_size = %d", next_mask_expression_stack_size); |
| 867 | tty->print_cr(" callee_size_of_parameters = %d", callee_size_of_parameters); |
| 868 | tty->print_cr(" callee_max_locals = %d", callee_max_locals); |
| 869 | tty->print_cr(" top_frame_expression_stack_adjustment = %d", top_frame_expression_stack_adjustment); |
| 870 | tty->print_cr(" exec_mode = %d", exec_mode); |
| 871 | tty->print_cr(" cur_invoke_parameter_size = %d", cur_invoke_parameter_size); |
| 872 | tty->print_cr(" Thread = " INTPTR_FORMAT"0x%016" "l" "x" ", thread ID = %d", p2i(thread), thread->osthread()->thread_id()); |
| 873 | tty->print_cr(" Interpreted frames:"); |
| 874 | for (int k = 0; k < cur_array->frames(); k++) { |
| 875 | vframeArrayElement* el = cur_array->element(k); |
| 876 | tty->print_cr(" %s (bci %d)", el->method()->name_and_sig_as_C_string(), el->bci()); |
| 877 | } |
| 878 | cur_array->print_on_2(tty); |
| 879 | } |
| 880 | guarantee(false, "wrong number of expression stack elements during deopt")do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 880, "guarantee(" "false" ") failed", "wrong number of expression stack elements during deopt" ); ::breakpoint(); } } while (0); |
| 881 | } |
| 882 | VerifyOopClosure verify; |
| 883 | iframe->oops_interpreted_do(&verify, &rm, false); |
| 884 | callee_size_of_parameters = mh->size_of_parameters(); |
| 885 | callee_max_locals = mh->max_locals(); |
| 886 | is_top_frame = false; |
| 887 | } |
| 888 | } |
| 889 | #endif /* !PRODUCT */ |
| 890 | |
| 891 | return bt; |
| 892 | JRT_END} |
| 893 | |
| 894 | class DeoptimizeMarkedClosure : public HandshakeClosure { |
| 895 | public: |
| 896 | DeoptimizeMarkedClosure() : HandshakeClosure("Deoptimize") {} |
| 897 | void do_thread(Thread* thread) { |
| 898 | JavaThread* jt = JavaThread::cast(thread); |
| 899 | jt->deoptimize_marked_methods(); |
| 900 | } |
| 901 | }; |
| 902 | |
| 903 | void Deoptimization::deoptimize_all_marked(nmethod* nmethod_only) { |
| 904 | ResourceMark rm; |
| 905 | DeoptimizationMarker dm; |
| 906 | |
| 907 | // Make the dependent methods not entrant |
| 908 | if (nmethod_only != NULL__null) { |
| 909 | nmethod_only->mark_for_deoptimization(); |
| 910 | nmethod_only->make_not_entrant(); |
| 911 | } else { |
| 912 | MutexLocker mu(SafepointSynchronize::is_at_safepoint() ? NULL__null : CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| 913 | CodeCache::make_marked_nmethods_not_entrant(); |
| 914 | } |
| 915 | |
| 916 | DeoptimizeMarkedClosure deopt; |
| 917 | if (SafepointSynchronize::is_at_safepoint()) { |
| 918 | Threads::java_threads_do(&deopt); |
| 919 | } else { |
| 920 | Handshake::execute(&deopt); |
| 921 | } |
| 922 | } |
| 923 | |
| 924 | Deoptimization::DeoptAction Deoptimization::_unloaded_action |
| 925 | = Deoptimization::Action_reinterpret; |
| 926 | |
| 927 | #if COMPILER2_OR_JVMCI1 |
| 928 | template<typename CacheType> |
| 929 | class BoxCacheBase : public CHeapObj<mtCompiler> { |
| 930 | protected: |
| 931 | static InstanceKlass* find_cache_klass(Symbol* klass_name) { |
| 932 | ResourceMark rm; |
| 933 | char* klass_name_str = klass_name->as_C_string(); |
| 934 | InstanceKlass* ik = SystemDictionary::find_instance_klass(klass_name, Handle(), Handle()); |
| 935 | guarantee(ik != NULL, "%s must be loaded", klass_name_str)do { if (!(ik != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 935, "guarantee(" "ik != NULL" ") failed", "%s must be loaded" , klass_name_str); ::breakpoint(); } } while (0); |
| 936 | guarantee(ik->is_initialized(), "%s must be initialized", klass_name_str)do { if (!(ik->is_initialized())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 936, "guarantee(" "ik->is_initialized()" ") failed", "%s must be initialized" , klass_name_str); ::breakpoint(); } } while (0); |
| 937 | CacheType::compute_offsets(ik); |
| 938 | return ik; |
| 939 | } |
| 940 | }; |
| 941 | |
| 942 | template<typename PrimitiveType, typename CacheType, typename BoxType> class BoxCache : public BoxCacheBase<CacheType> { |
| 943 | PrimitiveType _low; |
| 944 | PrimitiveType _high; |
| 945 | jobject _cache; |
| 946 | protected: |
| 947 | static BoxCache<PrimitiveType, CacheType, BoxType> *_singleton; |
| 948 | BoxCache(Thread* thread) { |
| 949 | InstanceKlass* ik = BoxCacheBase<CacheType>::find_cache_klass(CacheType::symbol()); |
| 950 | objArrayOop cache = CacheType::cache(ik); |
| 951 | assert(cache->length() > 0, "Empty cache")do { if (!(cache->length() > 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 951, "assert(" "cache->length() > 0" ") failed", "Empty cache" ); ::breakpoint(); } } while (0); |
| 952 | _low = BoxType::value(cache->obj_at(0)); |
| 953 | _high = _low + cache->length() - 1; |
| 954 | _cache = JNIHandles::make_global(Handle(thread, cache)); |
| 955 | } |
| 956 | ~BoxCache() { |
| 957 | JNIHandles::destroy_global(_cache); |
| 958 | } |
| 959 | public: |
| 960 | static BoxCache<PrimitiveType, CacheType, BoxType>* singleton(Thread* thread) { |
| 961 | if (_singleton == NULL__null) { |
| 962 | BoxCache<PrimitiveType, CacheType, BoxType>* s = new BoxCache<PrimitiveType, CacheType, BoxType>(thread); |
| 963 | if (!Atomic::replace_if_null(&_singleton, s)) { |
| 964 | delete s; |
| 965 | } |
| 966 | } |
| 967 | return _singleton; |
| 968 | } |
| 969 | oop lookup(PrimitiveType value) { |
| 970 | if (_low <= value && value <= _high) { |
| 971 | int offset = value - _low; |
| 972 | return objArrayOop(JNIHandles::resolve_non_null(_cache))->obj_at(offset); |
| 973 | } |
| 974 | return NULL__null; |
| 975 | } |
| 976 | oop lookup_raw(intptr_t raw_value) { |
| 977 | // Have to cast to avoid little/big-endian problems. |
| 978 | if (sizeof(PrimitiveType) > sizeof(jint)) { |
| 979 | jlong value = (jlong)raw_value; |
| 980 | return lookup(value); |
| 981 | } |
| 982 | PrimitiveType value = (PrimitiveType)*((jint*)&raw_value); |
| 983 | return lookup(value); |
| 984 | } |
| 985 | }; |
| 986 | |
| 987 | typedef BoxCache<jint, java_lang_Integer_IntegerCache, java_lang_Integer> IntegerBoxCache; |
| 988 | typedef BoxCache<jlong, java_lang_Long_LongCache, java_lang_Long> LongBoxCache; |
| 989 | typedef BoxCache<jchar, java_lang_Character_CharacterCache, java_lang_Character> CharacterBoxCache; |
| 990 | typedef BoxCache<jshort, java_lang_Short_ShortCache, java_lang_Short> ShortBoxCache; |
| 991 | typedef BoxCache<jbyte, java_lang_Byte_ByteCache, java_lang_Byte> ByteBoxCache; |
| 992 | |
| 993 | template<> BoxCache<jint, java_lang_Integer_IntegerCache, java_lang_Integer>* BoxCache<jint, java_lang_Integer_IntegerCache, java_lang_Integer>::_singleton = NULL__null; |
| 994 | template<> BoxCache<jlong, java_lang_Long_LongCache, java_lang_Long>* BoxCache<jlong, java_lang_Long_LongCache, java_lang_Long>::_singleton = NULL__null; |
| 995 | template<> BoxCache<jchar, java_lang_Character_CharacterCache, java_lang_Character>* BoxCache<jchar, java_lang_Character_CharacterCache, java_lang_Character>::_singleton = NULL__null; |
| 996 | template<> BoxCache<jshort, java_lang_Short_ShortCache, java_lang_Short>* BoxCache<jshort, java_lang_Short_ShortCache, java_lang_Short>::_singleton = NULL__null; |
| 997 | template<> BoxCache<jbyte, java_lang_Byte_ByteCache, java_lang_Byte>* BoxCache<jbyte, java_lang_Byte_ByteCache, java_lang_Byte>::_singleton = NULL__null; |
| 998 | |
| 999 | class BooleanBoxCache : public BoxCacheBase<java_lang_Boolean> { |
| 1000 | jobject _true_cache; |
| 1001 | jobject _false_cache; |
| 1002 | protected: |
| 1003 | static BooleanBoxCache *_singleton; |
| 1004 | BooleanBoxCache(Thread *thread) { |
| 1005 | InstanceKlass* ik = find_cache_klass(java_lang_Boolean::symbol()); |
| 1006 | _true_cache = JNIHandles::make_global(Handle(thread, java_lang_Boolean::get_TRUE(ik))); |
| 1007 | _false_cache = JNIHandles::make_global(Handle(thread, java_lang_Boolean::get_FALSE(ik))); |
| 1008 | } |
| 1009 | ~BooleanBoxCache() { |
| 1010 | JNIHandles::destroy_global(_true_cache); |
| 1011 | JNIHandles::destroy_global(_false_cache); |
| 1012 | } |
| 1013 | public: |
| 1014 | static BooleanBoxCache* singleton(Thread* thread) { |
| 1015 | if (_singleton == NULL__null) { |
| 1016 | BooleanBoxCache* s = new BooleanBoxCache(thread); |
| 1017 | if (!Atomic::replace_if_null(&_singleton, s)) { |
| 1018 | delete s; |
| 1019 | } |
| 1020 | } |
| 1021 | return _singleton; |
| 1022 | } |
| 1023 | oop lookup_raw(intptr_t raw_value) { |
| 1024 | // Have to cast to avoid little/big-endian problems. |
| 1025 | jboolean value = (jboolean)*((jint*)&raw_value); |
| 1026 | return lookup(value); |
| 1027 | } |
| 1028 | oop lookup(jboolean value) { |
| 1029 | if (value != 0) { |
| 1030 | return JNIHandles::resolve_non_null(_true_cache); |
| 1031 | } |
| 1032 | return JNIHandles::resolve_non_null(_false_cache); |
| 1033 | } |
| 1034 | }; |
| 1035 | |
| 1036 | BooleanBoxCache* BooleanBoxCache::_singleton = NULL__null; |
| 1037 | |
| 1038 | oop Deoptimization::get_cached_box(AutoBoxObjectValue* bv, frame* fr, RegisterMap* reg_map, TRAPSJavaThread* __the_thread__) { |
| 1039 | Klass* k = java_lang_Class::as_Klass(bv->klass()->as_ConstantOopReadValue()->value()()); |
| 1040 | BasicType box_type = vmClasses::box_klass_type(k); |
| 1041 | if (box_type != T_OBJECT) { |
| 1042 | StackValue* value = StackValue::create_stack_value(fr, reg_map, bv->field_at(box_type == T_LONG ? 1 : 0)); |
| 1043 | switch(box_type) { |
| 1044 | case T_INT: return IntegerBoxCache::singleton(THREAD__the_thread__)->lookup_raw(value->get_int()); |
| 1045 | case T_CHAR: return CharacterBoxCache::singleton(THREAD__the_thread__)->lookup_raw(value->get_int()); |
| 1046 | case T_SHORT: return ShortBoxCache::singleton(THREAD__the_thread__)->lookup_raw(value->get_int()); |
| 1047 | case T_BYTE: return ByteBoxCache::singleton(THREAD__the_thread__)->lookup_raw(value->get_int()); |
| 1048 | case T_BOOLEAN: return BooleanBoxCache::singleton(THREAD__the_thread__)->lookup_raw(value->get_int()); |
| 1049 | case T_LONG: return LongBoxCache::singleton(THREAD__the_thread__)->lookup_raw(value->get_int()); |
| 1050 | default:; |
| 1051 | } |
| 1052 | } |
| 1053 | return NULL__null; |
| 1054 | } |
| 1055 | |
| 1056 | bool Deoptimization::realloc_objects(JavaThread* thread, frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects, TRAPSJavaThread* __the_thread__) { |
| 1057 | Handle pending_exception(THREAD__the_thread__, thread->pending_exception()); |
| 1058 | const char* exception_file = thread->exception_file(); |
| 1059 | int exception_line = thread->exception_line(); |
| 1060 | thread->clear_pending_exception(); |
| 1061 | |
| 1062 | bool failures = false; |
| 1063 | |
| 1064 | for (int i = 0; i < objects->length(); i++) { |
| 1065 | assert(objects->at(i)->is_object(), "invalid debug information")do { if (!(objects->at(i)->is_object())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1065, "assert(" "objects->at(i)->is_object()" ") failed" , "invalid debug information"); ::breakpoint(); } } while (0); |
| 1066 | ObjectValue* sv = (ObjectValue*) objects->at(i); |
| 1067 | |
| 1068 | Klass* k = java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()()); |
| 1069 | oop obj = NULL__null; |
| 1070 | |
| 1071 | if (k->is_instance_klass()) { |
| 1072 | if (sv->is_auto_box()) { |
| 1073 | AutoBoxObjectValue* abv = (AutoBoxObjectValue*) sv; |
| 1074 | obj = get_cached_box(abv, fr, reg_map, THREAD__the_thread__); |
| 1075 | if (obj != NULL__null) { |
| 1076 | // Set the flag to indicate the box came from a cache, so that we can skip the field reassignment for it. |
| 1077 | abv->set_cached(true); |
| 1078 | } |
| 1079 | } |
| 1080 | |
| 1081 | InstanceKlass* ik = InstanceKlass::cast(k); |
| 1082 | if (obj == NULL__null) { |
| 1083 | #ifdef COMPILER21 |
| 1084 | if (EnableVectorSupport && VectorSupport::is_vector(ik)) { |
| 1085 | obj = VectorSupport::allocate_vector(ik, fr, reg_map, sv, THREAD__the_thread__); |
| 1086 | } else { |
| 1087 | obj = ik->allocate_instance(THREAD__the_thread__); |
| 1088 | } |
| 1089 | #else |
| 1090 | obj = ik->allocate_instance(THREAD__the_thread__); |
| 1091 | #endif // COMPILER2 |
| 1092 | } |
| 1093 | } else if (k->is_typeArray_klass()) { |
| 1094 | TypeArrayKlass* ak = TypeArrayKlass::cast(k); |
| 1095 | assert(sv->field_size() % type2size[ak->element_type()] == 0, "non-integral array length")do { if (!(sv->field_size() % type2size[ak->element_type ()] == 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1095, "assert(" "sv->field_size() % type2size[ak->element_type()] == 0" ") failed", "non-integral array length"); ::breakpoint(); } } while (0); |
| 1096 | int len = sv->field_size() / type2size[ak->element_type()]; |
| 1097 | obj = ak->allocate(len, THREAD__the_thread__); |
| 1098 | } else if (k->is_objArray_klass()) { |
| 1099 | ObjArrayKlass* ak = ObjArrayKlass::cast(k); |
| 1100 | obj = ak->allocate(sv->field_size(), THREAD__the_thread__); |
| 1101 | } |
| 1102 | |
| 1103 | if (obj == NULL__null) { |
| 1104 | failures = true; |
| 1105 | } |
| 1106 | |
| 1107 | assert(sv->value().is_null(), "redundant reallocation")do { if (!(sv->value().is_null())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1107, "assert(" "sv->value().is_null()" ") failed", "redundant reallocation" ); ::breakpoint(); } } while (0); |
| 1108 | assert(obj != NULL || HAS_PENDING_EXCEPTION, "allocation should succeed or we should get an exception")do { if (!(obj != __null || (((ThreadShadow*)__the_thread__)-> has_pending_exception()))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1108, "assert(" "obj != __null || (((ThreadShadow*)__the_thread__)->has_pending_exception())" ") failed", "allocation should succeed or we should get an exception" ); ::breakpoint(); } } while (0); |
| 1109 | CLEAR_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->clear_pending_exception( )); |
| 1110 | sv->set_value(obj); |
| 1111 | } |
| 1112 | |
| 1113 | if (failures) { |
| 1114 | THROW_OOP_(Universe::out_of_memory_error_realloc_objects(), failures){ Exceptions::_throw_oop(__the_thread__, "/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1114, Universe::out_of_memory_error_realloc_objects()); return failures; }; |
| 1115 | } else if (pending_exception.not_null()) { |
| 1116 | thread->set_pending_exception(pending_exception(), exception_file, exception_line); |
| 1117 | } |
| 1118 | |
| 1119 | return failures; |
| 1120 | } |
| 1121 | |
| 1122 | #if INCLUDE_JVMCI1 |
| 1123 | /** |
| 1124 | * For primitive types whose kind gets "erased" at runtime (shorts become stack ints), |
| 1125 | * we need to somehow be able to recover the actual kind to be able to write the correct |
| 1126 | * amount of bytes. |
| 1127 | * For that purpose, this method assumes that, for an entry spanning n bytes at index i, |
| 1128 | * the entries at index n + 1 to n + i are 'markers'. |
| 1129 | * For example, if we were writing a short at index 4 of a byte array of size 8, the |
| 1130 | * expected form of the array would be: |
| 1131 | * |
| 1132 | * {b0, b1, b2, b3, INT, marker, b6, b7} |
| 1133 | * |
| 1134 | * Thus, in order to get back the size of the entry, we simply need to count the number |
| 1135 | * of marked entries |
| 1136 | * |
| 1137 | * @param virtualArray the virtualized byte array |
| 1138 | * @param i index of the virtual entry we are recovering |
| 1139 | * @return The number of bytes the entry spans |
| 1140 | */ |
| 1141 | static int count_number_of_bytes_for_entry(ObjectValue *virtualArray, int i) { |
| 1142 | int index = i; |
| 1143 | while (++index < virtualArray->field_size() && |
| 1144 | virtualArray->field_at(index)->is_marker()) {} |
| 1145 | return index - i; |
| 1146 | } |
| 1147 | |
| 1148 | /** |
| 1149 | * If there was a guarantee for byte array to always start aligned to a long, we could |
| 1150 | * do a simple check on the parity of the index. Unfortunately, that is not always the |
| 1151 | * case. Thus, we check alignment of the actual address we are writing to. |
| 1152 | * In the unlikely case index 0 is 5-aligned for example, it would then be possible to |
| 1153 | * write a long to index 3. |
| 1154 | */ |
| 1155 | static jbyte* check_alignment_get_addr(typeArrayOop obj, int index, int expected_alignment) { |
| 1156 | jbyte* res = obj->byte_at_addr(index); |
| 1157 | assert((((intptr_t) res) % expected_alignment) == 0, "Non-aligned write")do { if (!((((intptr_t) res) % expected_alignment) == 0)) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1157, "assert(" "(((intptr_t) res) % expected_alignment) == 0" ") failed", "Non-aligned write"); ::breakpoint(); } } while ( 0); |
| 1158 | return res; |
| 1159 | } |
| 1160 | |
| 1161 | static void byte_array_put(typeArrayOop obj, intptr_t val, int index, int byte_count) { |
| 1162 | switch (byte_count) { |
| 1163 | case 1: |
| 1164 | obj->byte_at_put(index, (jbyte) *((jint *) &val)); |
| 1165 | break; |
| 1166 | case 2: |
| 1167 | *((jshort *) check_alignment_get_addr(obj, index, 2)) = (jshort) *((jint *) &val); |
| 1168 | break; |
| 1169 | case 4: |
| 1170 | *((jint *) check_alignment_get_addr(obj, index, 4)) = (jint) *((jint *) &val); |
| 1171 | break; |
| 1172 | case 8: |
| 1173 | *((jlong *) check_alignment_get_addr(obj, index, 8)) = (jlong) *((jlong *) &val); |
| 1174 | break; |
| 1175 | default: |
| 1176 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1176); ::breakpoint(); } while (0); |
| 1177 | } |
| 1178 | } |
| 1179 | #endif // INCLUDE_JVMCI |
| 1180 | |
| 1181 | |
| 1182 | // restore elements of an eliminated type array |
| 1183 | void Deoptimization::reassign_type_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, typeArrayOop obj, BasicType type) { |
| 1184 | int index = 0; |
| 1185 | intptr_t val; |
| 1186 | |
| 1187 | for (int i = 0; i < sv->field_size(); i++) { |
| 1188 | StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); |
| 1189 | switch(type) { |
| 1190 | case T_LONG: case T_DOUBLE: { |
| 1191 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1191, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1192 | StackValue* low = |
| 1193 | StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
| 1194 | #ifdef _LP641 |
| 1195 | jlong res = (jlong)low->get_int(); |
| 1196 | #else |
| 1197 | jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
| 1198 | #endif |
| 1199 | obj->long_at_put(index, res); |
| 1200 | break; |
| 1201 | } |
| 1202 | |
| 1203 | // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
| 1204 | case T_INT: case T_FLOAT: { // 4 bytes. |
| 1205 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1205, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1206 | bool big_value = false; |
| 1207 | if (i + 1 < sv->field_size() && type == T_INT) { |
| 1208 | if (sv->field_at(i)->is_location()) { |
| 1209 | Location::Type type = ((LocationValue*) sv->field_at(i))->location().type(); |
| 1210 | if (type == Location::dbl || type == Location::lng) { |
| 1211 | big_value = true; |
| 1212 | } |
| 1213 | } else if (sv->field_at(i)->is_constant_int()) { |
| 1214 | ScopeValue* next_scope_field = sv->field_at(i + 1); |
| 1215 | if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
| 1216 | big_value = true; |
| 1217 | } |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | if (big_value) { |
| 1222 | StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++i)); |
| 1223 | #ifdef _LP641 |
| 1224 | jlong res = (jlong)low->get_int(); |
| 1225 | #else |
| 1226 | jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
| 1227 | #endif |
| 1228 | obj->int_at_put(index, (jint)*((jint*)&res)); |
| 1229 | obj->int_at_put(++index, (jint)*(((jint*)&res) + 1)); |
| 1230 | } else { |
| 1231 | val = value->get_int(); |
| 1232 | obj->int_at_put(index, (jint)*((jint*)&val)); |
| 1233 | } |
| 1234 | break; |
| 1235 | } |
| 1236 | |
| 1237 | case T_SHORT: |
| 1238 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1238, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1239 | val = value->get_int(); |
| 1240 | obj->short_at_put(index, (jshort)*((jint*)&val)); |
| 1241 | break; |
| 1242 | |
| 1243 | case T_CHAR: |
| 1244 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1244, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1245 | val = value->get_int(); |
| 1246 | obj->char_at_put(index, (jchar)*((jint*)&val)); |
| 1247 | break; |
| 1248 | |
| 1249 | case T_BYTE: { |
| 1250 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1250, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1251 | // The value we get is erased as a regular int. We will need to find its actual byte count 'by hand'. |
| 1252 | val = value->get_int(); |
| 1253 | #if INCLUDE_JVMCI1 |
| 1254 | int byte_count = count_number_of_bytes_for_entry(sv, i); |
| 1255 | byte_array_put(obj, val, index, byte_count); |
| 1256 | // According to byte_count contract, the values from i + 1 to i + byte_count are illegal values. Skip. |
| 1257 | i += byte_count - 1; // Balance the loop counter. |
| 1258 | index += byte_count; |
| 1259 | // index has been updated so continue at top of loop |
| 1260 | continue; |
| 1261 | #else |
| 1262 | obj->byte_at_put(index, (jbyte)*((jint*)&val)); |
| 1263 | break; |
| 1264 | #endif // INCLUDE_JVMCI |
| 1265 | } |
| 1266 | |
| 1267 | case T_BOOLEAN: { |
| 1268 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1268, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1269 | val = value->get_int(); |
| 1270 | obj->bool_at_put(index, (jboolean)*((jint*)&val)); |
| 1271 | break; |
| 1272 | } |
| 1273 | |
| 1274 | default: |
| 1275 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1275); ::breakpoint(); } while (0); |
| 1276 | } |
| 1277 | index++; |
| 1278 | } |
| 1279 | } |
| 1280 | |
| 1281 | // restore fields of an eliminated object array |
| 1282 | void Deoptimization::reassign_object_array_elements(frame* fr, RegisterMap* reg_map, ObjectValue* sv, objArrayOop obj) { |
| 1283 | for (int i = 0; i < sv->field_size(); i++) { |
| 1284 | StackValue* value = StackValue::create_stack_value(fr, reg_map, sv->field_at(i)); |
| 1285 | assert(value->type() == T_OBJECT, "object element expected")do { if (!(value->type() == T_OBJECT)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1285, "assert(" "value->type() == T_OBJECT" ") failed", "object element expected" ); ::breakpoint(); } } while (0); |
| 1286 | obj->obj_at_put(i, value->get_obj()()); |
| 1287 | } |
| 1288 | } |
| 1289 | |
| 1290 | class ReassignedField { |
| 1291 | public: |
| 1292 | int _offset; |
| 1293 | BasicType _type; |
| 1294 | public: |
| 1295 | ReassignedField() { |
| 1296 | _offset = 0; |
| 1297 | _type = T_ILLEGAL; |
| 1298 | } |
| 1299 | }; |
| 1300 | |
| 1301 | int compare(ReassignedField* left, ReassignedField* right) { |
| 1302 | return left->_offset - right->_offset; |
| 1303 | } |
| 1304 | |
| 1305 | // Restore fields of an eliminated instance object using the same field order |
| 1306 | // returned by HotSpotResolvedObjectTypeImpl.getInstanceFields(true) |
| 1307 | static int reassign_fields_by_klass(InstanceKlass* klass, frame* fr, RegisterMap* reg_map, ObjectValue* sv, int svIndex, oop obj, bool skip_internal) { |
| 1308 | GrowableArray<ReassignedField>* fields = new GrowableArray<ReassignedField>(); |
| 1309 | InstanceKlass* ik = klass; |
| 1310 | while (ik != NULL__null) { |
| 1311 | for (AllFieldStream fs(ik); !fs.done(); fs.next()) { |
| 1312 | if (!fs.access_flags().is_static() && (!skip_internal || !fs.access_flags().is_internal())) { |
| 1313 | ReassignedField field; |
| 1314 | field._offset = fs.offset(); |
| 1315 | field._type = Signature::basic_type(fs.signature()); |
| 1316 | fields->append(field); |
| 1317 | } |
| 1318 | } |
| 1319 | ik = ik->superklass(); |
| 1320 | } |
| 1321 | fields->sort(compare); |
| 1322 | for (int i = 0; i < fields->length(); i++) { |
| 1323 | intptr_t val; |
| 1324 | ScopeValue* scope_field = sv->field_at(svIndex); |
| 1325 | StackValue* value = StackValue::create_stack_value(fr, reg_map, scope_field); |
| 1326 | int offset = fields->at(i)._offset; |
| 1327 | BasicType type = fields->at(i)._type; |
| 1328 | switch (type) { |
| 1329 | case T_OBJECT: case T_ARRAY: |
| 1330 | assert(value->type() == T_OBJECT, "Agreement.")do { if (!(value->type() == T_OBJECT)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1330, "assert(" "value->type() == T_OBJECT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1331 | obj->obj_field_put(offset, value->get_obj()()); |
| 1332 | break; |
| 1333 | |
| 1334 | // Have to cast to INT (32 bits) pointer to avoid little/big-endian problem. |
| 1335 | case T_INT: case T_FLOAT: { // 4 bytes. |
| 1336 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1336, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1337 | bool big_value = false; |
| 1338 | if (i+1 < fields->length() && fields->at(i+1)._type == T_INT) { |
| 1339 | if (scope_field->is_location()) { |
| 1340 | Location::Type type = ((LocationValue*) scope_field)->location().type(); |
| 1341 | if (type == Location::dbl || type == Location::lng) { |
| 1342 | big_value = true; |
| 1343 | } |
| 1344 | } |
| 1345 | if (scope_field->is_constant_int()) { |
| 1346 | ScopeValue* next_scope_field = sv->field_at(svIndex + 1); |
| 1347 | if (next_scope_field->is_constant_long() || next_scope_field->is_constant_double()) { |
| 1348 | big_value = true; |
| 1349 | } |
| 1350 | } |
| 1351 | } |
| 1352 | |
| 1353 | if (big_value) { |
| 1354 | i++; |
| 1355 | assert(i < fields->length(), "second T_INT field needed")do { if (!(i < fields->length())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1355, "assert(" "i < fields->length()" ") failed", "second T_INT field needed" ); ::breakpoint(); } } while (0); |
| 1356 | assert(fields->at(i)._type == T_INT, "T_INT field needed")do { if (!(fields->at(i)._type == T_INT)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1356, "assert(" "fields->at(i)._type == T_INT" ") failed" , "T_INT field needed"); ::breakpoint(); } } while (0); |
| 1357 | } else { |
| 1358 | val = value->get_int(); |
| 1359 | obj->int_field_put(offset, (jint)*((jint*)&val)); |
| 1360 | break; |
| 1361 | } |
| 1362 | } |
| 1363 | /* no break */ |
| 1364 | |
| 1365 | case T_LONG: case T_DOUBLE: { |
| 1366 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1366, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1367 | StackValue* low = StackValue::create_stack_value(fr, reg_map, sv->field_at(++svIndex)); |
| 1368 | #ifdef _LP641 |
| 1369 | jlong res = (jlong)low->get_int(); |
| 1370 | #else |
| 1371 | jlong res = jlong_from((jint)value->get_int(), (jint)low->get_int()); |
| 1372 | #endif |
| 1373 | obj->long_field_put(offset, res); |
| 1374 | break; |
| 1375 | } |
| 1376 | |
| 1377 | case T_SHORT: |
| 1378 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1378, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1379 | val = value->get_int(); |
| 1380 | obj->short_field_put(offset, (jshort)*((jint*)&val)); |
| 1381 | break; |
| 1382 | |
| 1383 | case T_CHAR: |
| 1384 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1384, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1385 | val = value->get_int(); |
| 1386 | obj->char_field_put(offset, (jchar)*((jint*)&val)); |
| 1387 | break; |
| 1388 | |
| 1389 | case T_BYTE: |
| 1390 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1390, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1391 | val = value->get_int(); |
| 1392 | obj->byte_field_put(offset, (jbyte)*((jint*)&val)); |
| 1393 | break; |
| 1394 | |
| 1395 | case T_BOOLEAN: |
| 1396 | assert(value->type() == T_INT, "Agreement.")do { if (!(value->type() == T_INT)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1396, "assert(" "value->type() == T_INT" ") failed", "Agreement." ); ::breakpoint(); } } while (0); |
| 1397 | val = value->get_int(); |
| 1398 | obj->bool_field_put(offset, (jboolean)*((jint*)&val)); |
| 1399 | break; |
| 1400 | |
| 1401 | default: |
| 1402 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1402); ::breakpoint(); } while (0); |
| 1403 | } |
| 1404 | svIndex++; |
| 1405 | } |
| 1406 | return svIndex; |
| 1407 | } |
| 1408 | |
| 1409 | // restore fields of all eliminated objects and arrays |
| 1410 | void Deoptimization::reassign_fields(frame* fr, RegisterMap* reg_map, GrowableArray<ScopeValue*>* objects, bool realloc_failures, bool skip_internal) { |
| 1411 | for (int i = 0; i < objects->length(); i++) { |
| 1412 | ObjectValue* sv = (ObjectValue*) objects->at(i); |
| 1413 | Klass* k = java_lang_Class::as_Klass(sv->klass()->as_ConstantOopReadValue()->value()()); |
| 1414 | Handle obj = sv->value(); |
| 1415 | assert(obj.not_null() || realloc_failures, "reallocation was missed")do { if (!(obj.not_null() || realloc_failures)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1415, "assert(" "obj.not_null() || realloc_failures" ") failed" , "reallocation was missed"); ::breakpoint(); } } while (0); |
| 1416 | if (PrintDeoptimizationDetails) { |
| 1417 | tty->print_cr("reassign fields for object of type %s!", k->name()->as_C_string()); |
| 1418 | } |
| 1419 | if (obj.is_null()) { |
| 1420 | continue; |
| 1421 | } |
| 1422 | |
| 1423 | // Don't reassign fields of boxes that came from a cache. Caches may be in CDS. |
| 1424 | if (sv->is_auto_box() && ((AutoBoxObjectValue*) sv)->is_cached()) { |
| 1425 | continue; |
| 1426 | } |
| 1427 | #ifdef COMPILER21 |
| 1428 | if (EnableVectorSupport && VectorSupport::is_vector(k)) { |
| 1429 | assert(sv->field_size() == 1, "%s not a vector", k->name()->as_C_string())do { if (!(sv->field_size() == 1)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1429, "assert(" "sv->field_size() == 1" ") failed", "%s not a vector" , k->name()->as_C_string()); ::breakpoint(); } } while ( 0); |
| 1430 | ScopeValue* payload = sv->field_at(0); |
| 1431 | if (payload->is_location() && |
| 1432 | payload->as_LocationValue()->location().type() == Location::vector) { |
| 1433 | if (PrintDeoptimizationDetails) { |
| 1434 | tty->print_cr("skip field reassignment for this vector - it should be assigned already"); |
| 1435 | if (Verbose) { |
| 1436 | Handle obj = sv->value(); |
| 1437 | k->oop_print_on(obj(), tty); |
| 1438 | } |
| 1439 | } |
| 1440 | continue; // Such vector's value was already restored in VectorSupport::allocate_vector(). |
| 1441 | } |
| 1442 | // Else fall-through to do assignment for scalar-replaced boxed vector representation |
| 1443 | // which could be restored after vector object allocation. |
| 1444 | } |
| 1445 | #endif |
| 1446 | if (k->is_instance_klass()) { |
| 1447 | InstanceKlass* ik = InstanceKlass::cast(k); |
| 1448 | reassign_fields_by_klass(ik, fr, reg_map, sv, 0, obj(), skip_internal); |
| 1449 | } else if (k->is_typeArray_klass()) { |
| 1450 | TypeArrayKlass* ak = TypeArrayKlass::cast(k); |
| 1451 | reassign_type_array_elements(fr, reg_map, sv, (typeArrayOop) obj(), ak->element_type()); |
| 1452 | } else if (k->is_objArray_klass()) { |
| 1453 | reassign_object_array_elements(fr, reg_map, sv, (objArrayOop) obj()); |
| 1454 | } |
| 1455 | } |
| 1456 | } |
| 1457 | |
| 1458 | |
| 1459 | // relock objects for which synchronization was eliminated |
| 1460 | bool Deoptimization::relock_objects(JavaThread* thread, GrowableArray<MonitorInfo*>* monitors, |
| 1461 | JavaThread* deoptee_thread, frame& fr, int exec_mode, bool realloc_failures) { |
| 1462 | bool relocked_objects = false; |
| 1463 | for (int i = 0; i < monitors->length(); i++) { |
| 1464 | MonitorInfo* mon_info = monitors->at(i); |
| 1465 | if (mon_info->eliminated()) { |
| 1466 | assert(!mon_info->owner_is_scalar_replaced() || realloc_failures, "reallocation was missed")do { if (!(!mon_info->owner_is_scalar_replaced() || realloc_failures )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1466, "assert(" "!mon_info->owner_is_scalar_replaced() || realloc_failures" ") failed", "reallocation was missed"); ::breakpoint(); } } while (0); |
| 1467 | relocked_objects = true; |
| 1468 | if (!mon_info->owner_is_scalar_replaced()) { |
| 1469 | Handle obj(thread, mon_info->owner()); |
| 1470 | markWord mark = obj->mark(); |
| 1471 | if (exec_mode == Unpack_none) { |
| 1472 | if (mark.has_locker() && fr.sp() > (intptr_t*)mark.locker()) { |
| 1473 | // With exec_mode == Unpack_none obj may be thread local and locked in |
| 1474 | // a callee frame. Make the lock in the callee a recursive lock and restore the displaced header. |
| 1475 | markWord dmw = mark.displaced_mark_helper(); |
| 1476 | mark.locker()->set_displaced_header(markWord::encode((BasicLock*) NULL__null)); |
| 1477 | obj->set_mark(dmw); |
| 1478 | } |
| 1479 | if (mark.has_monitor()) { |
| 1480 | // defer relocking if the deoptee thread is currently waiting for obj |
| 1481 | ObjectMonitor* waiting_monitor = deoptee_thread->current_waiting_monitor(); |
| 1482 | if (waiting_monitor != NULL__null && waiting_monitor->object() == obj()) { |
| 1483 | assert(fr.is_deoptimized_frame(), "frame must be scheduled for deoptimization")do { if (!(fr.is_deoptimized_frame())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1483, "assert(" "fr.is_deoptimized_frame()" ") failed", "frame must be scheduled for deoptimization" ); ::breakpoint(); } } while (0); |
| 1484 | mon_info->lock()->set_displaced_header(markWord::unused_mark()); |
| 1485 | JvmtiDeferredUpdates::inc_relock_count_after_wait(deoptee_thread); |
| 1486 | continue; |
| 1487 | } |
| 1488 | } |
| 1489 | } |
| 1490 | BasicLock* lock = mon_info->lock(); |
| 1491 | ObjectSynchronizer::enter(obj, lock, deoptee_thread); |
| 1492 | assert(mon_info->owner()->is_locked(), "object must be locked now")do { if (!(mon_info->owner()->is_locked())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1492, "assert(" "mon_info->owner()->is_locked()" ") failed" , "object must be locked now"); ::breakpoint(); } } while (0); |
| 1493 | } |
| 1494 | } |
| 1495 | } |
| 1496 | return relocked_objects; |
| 1497 | } |
| 1498 | #endif // COMPILER2_OR_JVMCI |
| 1499 | |
| 1500 | vframeArray* Deoptimization::create_vframeArray(JavaThread* thread, frame fr, RegisterMap *reg_map, GrowableArray<compiledVFrame*>* chunk, bool realloc_failures) { |
| 1501 | Events::log_deopt_message(thread, "DEOPT PACKING pc=" INTPTR_FORMAT"0x%016" "l" "x" " sp=" INTPTR_FORMAT"0x%016" "l" "x", p2i(fr.pc()), p2i(fr.sp())); |
| 1502 | |
| 1503 | #ifndef PRODUCT |
| 1504 | if (PrintDeoptimizationDetails) { |
| 1505 | ResourceMark rm; |
| 1506 | stringStream st; |
| 1507 | st.print("DEOPT PACKING thread " INTPTR_FORMAT"0x%016" "l" "x" " ", p2i(thread)); |
| 1508 | fr.print_on(&st); |
| 1509 | st.print_cr(" Virtual frames (innermost first):"); |
| 1510 | for (int index = 0; index < chunk->length(); index++) { |
| 1511 | compiledVFrame* vf = chunk->at(index); |
| 1512 | st.print(" %2d - ", index); |
| 1513 | vf->print_value_on(&st); |
| 1514 | int bci = chunk->at(index)->raw_bci(); |
| 1515 | const char* code_name; |
| 1516 | if (bci == SynchronizationEntryBCI) { |
| 1517 | code_name = "sync entry"; |
| 1518 | } else { |
| 1519 | Bytecodes::Code code = vf->method()->code_at(bci); |
| 1520 | code_name = Bytecodes::name(code); |
| 1521 | } |
| 1522 | st.print(" - %s", code_name); |
| 1523 | st.print_cr(" @ bci %d ", bci); |
| 1524 | if (Verbose) { |
| 1525 | vf->print_on(&st); |
| 1526 | st.cr(); |
| 1527 | } |
| 1528 | } |
| 1529 | tty->print_raw(st.as_string()); |
| 1530 | } |
| 1531 | #endif |
| 1532 | |
| 1533 | // Register map for next frame (used for stack crawl). We capture |
| 1534 | // the state of the deopt'ing frame's caller. Thus if we need to |
| 1535 | // stuff a C2I adapter we can properly fill in the callee-save |
| 1536 | // register locations. |
| 1537 | frame caller = fr.sender(reg_map); |
| 1538 | int frame_size = caller.sp() - fr.sp(); |
| 1539 | |
| 1540 | frame sender = caller; |
| 1541 | |
| 1542 | // Since the Java thread being deoptimized will eventually adjust it's own stack, |
| 1543 | // the vframeArray containing the unpacking information is allocated in the C heap. |
| 1544 | // For Compiler1, the caller of the deoptimized frame is saved for use by unpack_frames(). |
| 1545 | vframeArray* array = vframeArray::allocate(thread, frame_size, chunk, reg_map, sender, caller, fr, realloc_failures); |
| 1546 | |
| 1547 | // Compare the vframeArray to the collected vframes |
| 1548 | assert(array->structural_compare(thread, chunk), "just checking")do { if (!(array->structural_compare(thread, chunk))) { (* g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1548, "assert(" "array->structural_compare(thread, chunk)" ") failed", "just checking"); ::breakpoint(); } } while (0); |
| 1549 | |
| 1550 | #ifndef PRODUCT |
| 1551 | if (PrintDeoptimizationDetails) { |
| 1552 | tty->print_cr(" Created vframeArray " INTPTR_FORMAT"0x%016" "l" "x", p2i(array)); |
| 1553 | } |
| 1554 | #endif // PRODUCT |
| 1555 | |
| 1556 | return array; |
| 1557 | } |
| 1558 | |
| 1559 | #if COMPILER2_OR_JVMCI1 |
| 1560 | void Deoptimization::pop_frames_failed_reallocs(JavaThread* thread, vframeArray* array) { |
| 1561 | // Reallocation of some scalar replaced objects failed. Record |
| 1562 | // that we need to pop all the interpreter frames for the |
| 1563 | // deoptimized compiled frame. |
| 1564 | assert(thread->frames_to_pop_failed_realloc() == 0, "missed frames to pop?")do { if (!(thread->frames_to_pop_failed_realloc() == 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1564, "assert(" "thread->frames_to_pop_failed_realloc() == 0" ") failed", "missed frames to pop?"); ::breakpoint(); } } while (0); |
| 1565 | thread->set_frames_to_pop_failed_realloc(array->frames()); |
| 1566 | // Unlock all monitors here otherwise the interpreter will see a |
| 1567 | // mix of locked and unlocked monitors (because of failed |
| 1568 | // reallocations of synchronized objects) and be confused. |
| 1569 | for (int i = 0; i < array->frames(); i++) { |
| 1570 | MonitorChunk* monitors = array->element(i)->monitors(); |
| 1571 | if (monitors != NULL__null) { |
| 1572 | for (int j = 0; j < monitors->number_of_monitors(); j++) { |
| 1573 | BasicObjectLock* src = monitors->at(j); |
| 1574 | if (src->obj() != NULL__null) { |
| 1575 | ObjectSynchronizer::exit(src->obj(), src->lock(), thread); |
| 1576 | } |
| 1577 | } |
| 1578 | array->element(i)->free_monitors(thread); |
| 1579 | #ifdef ASSERT1 |
| 1580 | array->element(i)->set_removed_monitors(); |
| 1581 | #endif |
| 1582 | } |
| 1583 | } |
| 1584 | } |
| 1585 | #endif |
| 1586 | |
| 1587 | void Deoptimization::deoptimize_single_frame(JavaThread* thread, frame fr, Deoptimization::DeoptReason reason) { |
| 1588 | assert(fr.can_be_deoptimized(), "checking frame type")do { if (!(fr.can_be_deoptimized())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1588, "assert(" "fr.can_be_deoptimized()" ") failed", "checking frame type" ); ::breakpoint(); } } while (0); |
| 1589 | |
| 1590 | gather_statistics(reason, Action_none, Bytecodes::_illegal); |
| 1591 | |
| 1592 | if (LogCompilation && xtty != NULL__null) { |
| 1593 | CompiledMethod* cm = fr.cb()->as_compiled_method_or_null(); |
| 1594 | assert(cm != NULL, "only compiled methods can deopt")do { if (!(cm != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1594, "assert(" "cm != __null" ") failed", "only compiled methods can deopt" ); ::breakpoint(); } } while (0); |
| 1595 | |
| 1596 | ttyLocker ttyl; |
| 1597 | xtty->begin_head("deoptimized thread='" UINTX_FORMAT"%" "l" "u" "' reason='%s' pc='" INTPTR_FORMAT"0x%016" "l" "x" "'",(uintx)thread->osthread()->thread_id(), trap_reason_name(reason), p2i(fr.pc())); |
| 1598 | cm->log_identity(xtty); |
| 1599 | xtty->end_head(); |
| 1600 | for (ScopeDesc* sd = cm->scope_desc_at(fr.pc()); ; sd = sd->sender()) { |
| 1601 | xtty->begin_elem("jvms bci='%d'", sd->bci()); |
| 1602 | xtty->method(sd->method()); |
| 1603 | xtty->end_elem(); |
| 1604 | if (sd->is_top()) break; |
| 1605 | } |
| 1606 | xtty->tail("deoptimized"); |
| 1607 | } |
| 1608 | |
| 1609 | // Patch the compiled method so that when execution returns to it we will |
| 1610 | // deopt the execution state and return to the interpreter. |
| 1611 | fr.deoptimize(thread); |
| 1612 | } |
| 1613 | |
| 1614 | void Deoptimization::deoptimize(JavaThread* thread, frame fr, DeoptReason reason) { |
| 1615 | // Deoptimize only if the frame comes from compile code. |
| 1616 | // Do not deoptimize the frame which is already patched |
| 1617 | // during the execution of the loops below. |
| 1618 | if (!fr.is_compiled_frame() || fr.is_deoptimized_frame()) { |
| 1619 | return; |
| 1620 | } |
| 1621 | ResourceMark rm; |
| 1622 | DeoptimizationMarker dm; |
| 1623 | deoptimize_single_frame(thread, fr, reason); |
| 1624 | } |
| 1625 | |
| 1626 | #if INCLUDE_JVMCI1 |
| 1627 | address Deoptimization::deoptimize_for_missing_exception_handler(CompiledMethod* cm) { |
| 1628 | // there is no exception handler for this pc => deoptimize |
| 1629 | cm->make_not_entrant(); |
| 1630 | |
| 1631 | // Use Deoptimization::deoptimize for all of its side-effects: |
| 1632 | // gathering traps statistics, logging... |
| 1633 | // it also patches the return pc but we do not care about that |
| 1634 | // since we return a continuation to the deopt_blob below. |
| 1635 | JavaThread* thread = JavaThread::current(); |
| 1636 | RegisterMap reg_map(thread, false); |
| 1637 | frame runtime_frame = thread->last_frame(); |
| 1638 | frame caller_frame = runtime_frame.sender(®_map); |
| 1639 | assert(caller_frame.cb()->as_compiled_method_or_null() == cm, "expect top frame compiled method")do { if (!(caller_frame.cb()->as_compiled_method_or_null() == cm)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1639, "assert(" "caller_frame.cb()->as_compiled_method_or_null() == cm" ") failed", "expect top frame compiled method"); ::breakpoint (); } } while (0); |
| 1640 | vframe* vf = vframe::new_vframe(&caller_frame, ®_map, thread); |
| 1641 | compiledVFrame* cvf = compiledVFrame::cast(vf); |
| 1642 | ScopeDesc* imm_scope = cvf->scope(); |
| 1643 | MethodData* imm_mdo = get_method_data(thread, methodHandle(thread, imm_scope->method()), true); |
| 1644 | if (imm_mdo != NULL__null) { |
| 1645 | ProfileData* pdata = imm_mdo->allocate_bci_to_data(imm_scope->bci(), NULL__null); |
| 1646 | if (pdata != NULL__null && pdata->is_BitData()) { |
| 1647 | BitData* bit_data = (BitData*) pdata; |
| 1648 | bit_data->set_exception_seen(); |
| 1649 | } |
| 1650 | } |
| 1651 | |
| 1652 | Deoptimization::deoptimize(thread, caller_frame, Deoptimization::Reason_not_compiled_exception_handler); |
| 1653 | |
| 1654 | MethodData* trap_mdo = get_method_data(thread, methodHandle(thread, cm->method()), true); |
| 1655 | if (trap_mdo != NULL__null) { |
| 1656 | trap_mdo->inc_trap_count(Deoptimization::Reason_not_compiled_exception_handler); |
| 1657 | } |
| 1658 | |
| 1659 | return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls(); |
| 1660 | } |
| 1661 | #endif |
| 1662 | |
| 1663 | void Deoptimization::deoptimize_frame_internal(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
| 1664 | assert(thread == Thread::current() ||do { if (!(thread == Thread::current() || thread->is_handshake_safe_for (Thread::current()) || SafepointSynchronize::is_at_safepoint( ))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1667, "assert(" "thread == Thread::current() || thread->is_handshake_safe_for(Thread::current()) || SafepointSynchronize::is_at_safepoint()" ") failed", "can only deoptimize other thread at a safepoint/handshake" ); ::breakpoint(); } } while (0) |
| 1665 | thread->is_handshake_safe_for(Thread::current()) ||do { if (!(thread == Thread::current() || thread->is_handshake_safe_for (Thread::current()) || SafepointSynchronize::is_at_safepoint( ))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1667, "assert(" "thread == Thread::current() || thread->is_handshake_safe_for(Thread::current()) || SafepointSynchronize::is_at_safepoint()" ") failed", "can only deoptimize other thread at a safepoint/handshake" ); ::breakpoint(); } } while (0) |
| 1666 | SafepointSynchronize::is_at_safepoint(),do { if (!(thread == Thread::current() || thread->is_handshake_safe_for (Thread::current()) || SafepointSynchronize::is_at_safepoint( ))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1667, "assert(" "thread == Thread::current() || thread->is_handshake_safe_for(Thread::current()) || SafepointSynchronize::is_at_safepoint()" ") failed", "can only deoptimize other thread at a safepoint/handshake" ); ::breakpoint(); } } while (0) |
| 1667 | "can only deoptimize other thread at a safepoint/handshake")do { if (!(thread == Thread::current() || thread->is_handshake_safe_for (Thread::current()) || SafepointSynchronize::is_at_safepoint( ))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1667, "assert(" "thread == Thread::current() || thread->is_handshake_safe_for(Thread::current()) || SafepointSynchronize::is_at_safepoint()" ") failed", "can only deoptimize other thread at a safepoint/handshake" ); ::breakpoint(); } } while (0); |
| 1668 | // Compute frame and register map based on thread and sp. |
| 1669 | RegisterMap reg_map(thread, false); |
| 1670 | frame fr = thread->last_frame(); |
| 1671 | while (fr.id() != id) { |
| 1672 | fr = fr.sender(®_map); |
| 1673 | } |
| 1674 | deoptimize(thread, fr, reason); |
| 1675 | } |
| 1676 | |
| 1677 | |
| 1678 | void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id, DeoptReason reason) { |
| 1679 | Thread* current = Thread::current(); |
| 1680 | if (thread == current || thread->is_handshake_safe_for(current)) { |
| 1681 | Deoptimization::deoptimize_frame_internal(thread, id, reason); |
| 1682 | } else { |
| 1683 | VM_DeoptimizeFrame deopt(thread, id, reason); |
| 1684 | VMThread::execute(&deopt); |
| 1685 | } |
| 1686 | } |
| 1687 | |
| 1688 | void Deoptimization::deoptimize_frame(JavaThread* thread, intptr_t* id) { |
| 1689 | deoptimize_frame(thread, id, Reason_constraint); |
| 1690 | } |
| 1691 | |
| 1692 | // JVMTI PopFrame support |
| 1693 | JRT_LEAF(void, Deoptimization::popframe_preserve_args(JavaThread* thread, int bytes_to_save, void* start_address))void Deoptimization::popframe_preserve_args(JavaThread* thread , int bytes_to_save, void* start_address) { NoHandleMark __hm ; ; os::verify_stack_alignment(); NoSafepointVerifier __nsv; |
| 1694 | { |
| 1695 | thread->popframe_preserve_args(in_ByteSize(bytes_to_save), start_address); |
| 1696 | } |
| 1697 | JRT_END} |
| 1698 | |
| 1699 | MethodData* |
| 1700 | Deoptimization::get_method_data(JavaThread* thread, const methodHandle& m, |
| 1701 | bool create_if_missing) { |
| 1702 | JavaThread* THREAD__the_thread__ = thread; // For exception macros. |
| 1703 | MethodData* mdo = m()->method_data(); |
| 1704 | if (mdo == NULL__null && create_if_missing && !HAS_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->has_pending_exception())) { |
| 1705 | // Build an MDO. Ignore errors like OutOfMemory; |
| 1706 | // that simply means we won't have an MDO to update. |
| 1707 | Method::build_interpreter_method_data(m, THREAD__the_thread__); |
| 1708 | if (HAS_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->has_pending_exception())) { |
| 1709 | // Only metaspace OOM is expected. No Java code executed. |
| 1710 | assert((PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())), "we expect only an OOM error here")do { if (!(((((ThreadShadow*)__the_thread__)->pending_exception ())->is_a(vmClasses::OutOfMemoryError_klass())))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1710, "assert(" "((((ThreadShadow*)__the_thread__)->pending_exception())->is_a(vmClasses::OutOfMemoryError_klass()))" ") failed", "we expect only an OOM error here"); ::breakpoint (); } } while (0); |
| 1711 | CLEAR_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->clear_pending_exception( )); |
| 1712 | } |
| 1713 | mdo = m()->method_data(); |
| 1714 | } |
| 1715 | return mdo; |
| 1716 | } |
| 1717 | |
| 1718 | #if COMPILER2_OR_JVMCI1 |
| 1719 | void Deoptimization::load_class_by_index(const constantPoolHandle& constant_pool, int index, TRAPSJavaThread* __the_thread__) { |
| 1720 | // In case of an unresolved klass entry, load the class. |
| 1721 | // This path is exercised from case _ldc in Parse::do_one_bytecode, |
| 1722 | // and probably nowhere else. |
| 1723 | // Even that case would benefit from simply re-interpreting the |
| 1724 | // bytecode, without paying special attention to the class index. |
| 1725 | // So this whole "class index" feature should probably be removed. |
| 1726 | |
| 1727 | if (constant_pool->tag_at(index).is_unresolved_klass()) { |
| 1728 | Klass* tk = constant_pool->klass_at(index, THREAD__the_thread__); |
| 1729 | if (HAS_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->has_pending_exception())) { |
| 1730 | // Exception happened during classloading. We ignore the exception here, since it |
| 1731 | // is going to be rethrown since the current activation is going to be deoptimized and |
| 1732 | // the interpreter will re-execute the bytecode. |
| 1733 | // Do not clear probable Async Exceptions. |
| 1734 | CLEAR_PENDING_NONASYNC_EXCEPTION(((ThreadShadow*)__the_thread__)->clear_pending_nonasync_exception ()); |
| 1735 | // Class loading called java code which may have caused a stack |
| 1736 | // overflow. If the exception was thrown right before the return |
| 1737 | // to the runtime the stack is no longer guarded. Reguard the |
| 1738 | // stack otherwise if we return to the uncommon trap blob and the |
| 1739 | // stack bang causes a stack overflow we crash. |
| 1740 | JavaThread* jt = THREAD__the_thread__; |
| 1741 | bool guard_pages_enabled = jt->stack_overflow_state()->reguard_stack_if_needed(); |
| 1742 | assert(guard_pages_enabled, "stack banging in uncommon trap blob may cause crash")do { if (!(guard_pages_enabled)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1742, "assert(" "guard_pages_enabled" ") failed", "stack banging in uncommon trap blob may cause crash" ); ::breakpoint(); } } while (0); |
| 1743 | } |
| 1744 | return; |
| 1745 | } |
| 1746 | |
| 1747 | assert(!constant_pool->tag_at(index).is_symbol(),do { if (!(!constant_pool->tag_at(index).is_symbol())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1748, "assert(" "!constant_pool->tag_at(index).is_symbol()" ") failed", "no symbolic names here, please"); ::breakpoint( ); } } while (0) |
| 1748 | "no symbolic names here, please")do { if (!(!constant_pool->tag_at(index).is_symbol())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1748, "assert(" "!constant_pool->tag_at(index).is_symbol()" ") failed", "no symbolic names here, please"); ::breakpoint( ); } } while (0); |
| 1749 | } |
| 1750 | |
| 1751 | #if INCLUDE_JFR1 |
| 1752 | |
| 1753 | class DeoptReasonSerializer : public JfrSerializer { |
| 1754 | public: |
| 1755 | void serialize(JfrCheckpointWriter& writer) { |
| 1756 | writer.write_count((u4)(Deoptimization::Reason_LIMIT + 1)); // + Reason::many (-1) |
| 1757 | for (int i = -1; i < Deoptimization::Reason_LIMIT; ++i) { |
| 1758 | writer.write_key((u8)i); |
| 1759 | writer.write(Deoptimization::trap_reason_name(i)); |
| 1760 | } |
| 1761 | } |
| 1762 | }; |
| 1763 | |
| 1764 | class DeoptActionSerializer : public JfrSerializer { |
| 1765 | public: |
| 1766 | void serialize(JfrCheckpointWriter& writer) { |
| 1767 | static const u4 nof_actions = Deoptimization::Action_LIMIT; |
| 1768 | writer.write_count(nof_actions); |
| 1769 | for (u4 i = 0; i < Deoptimization::Action_LIMIT; ++i) { |
| 1770 | writer.write_key(i); |
| 1771 | writer.write(Deoptimization::trap_action_name((int)i)); |
| 1772 | } |
| 1773 | } |
| 1774 | }; |
| 1775 | |
| 1776 | static void register_serializers() { |
| 1777 | static int critical_section = 0; |
| 1778 | if (1 == critical_section || Atomic::cmpxchg(&critical_section, 0, 1) == 1) { |
| 1779 | return; |
| 1780 | } |
| 1781 | JfrSerializer::register_serializer(TYPE_DEOPTIMIZATIONREASON, true, new DeoptReasonSerializer()); |
| 1782 | JfrSerializer::register_serializer(TYPE_DEOPTIMIZATIONACTION, true, new DeoptActionSerializer()); |
| 1783 | } |
| 1784 | |
| 1785 | static void post_deoptimization_event(CompiledMethod* nm, |
| 1786 | const Method* method, |
| 1787 | int trap_bci, |
| 1788 | int instruction, |
| 1789 | Deoptimization::DeoptReason reason, |
| 1790 | Deoptimization::DeoptAction action) { |
| 1791 | assert(nm != NULL, "invariant")do { if (!(nm != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1791, "assert(" "nm != __null" ") failed", "invariant"); :: breakpoint(); } } while (0); |
| 1792 | assert(method != NULL, "invariant")do { if (!(method != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1792, "assert(" "method != __null" ") failed", "invariant") ; ::breakpoint(); } } while (0); |
| 1793 | if (EventDeoptimization::is_enabled()) { |
| 1794 | static bool serializers_registered = false; |
| 1795 | if (!serializers_registered) { |
| 1796 | register_serializers(); |
| 1797 | serializers_registered = true; |
| 1798 | } |
| 1799 | EventDeoptimization event; |
| 1800 | event.set_compileId(nm->compile_id()); |
| 1801 | event.set_compiler(nm->compiler_type()); |
| 1802 | event.set_method(method); |
| 1803 | event.set_lineNumber(method->line_number_from_bci(trap_bci)); |
| 1804 | event.set_bci(trap_bci); |
| 1805 | event.set_instruction(instruction); |
| 1806 | event.set_reason(reason); |
| 1807 | event.set_action(action); |
| 1808 | event.commit(); |
| 1809 | } |
| 1810 | } |
| 1811 | |
| 1812 | #endif // INCLUDE_JFR |
| 1813 | |
| 1814 | JRT_ENTRY(void, Deoptimization::uncommon_trap_inner(JavaThread* current, jint trap_request))void Deoptimization::uncommon_trap_inner(JavaThread* current, jint trap_request) { do { if (!(current == JavaThread::current ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1814, "assert(" "current == JavaThread::current()" ") failed" , "Must be"); ::breakpoint(); } } while (0); ; ThreadInVMfromJava __tiv(current); HandleMarkCleaner __hm(current); JavaThread* __the_thread__ = current; os::verify_stack_alignment(); VMEntryWrapper __vew; { |
| 1815 | HandleMark hm(current); |
| 1816 | |
| 1817 | // uncommon_trap() is called at the beginning of the uncommon trap |
| 1818 | // handler. Note this fact before we start generating temporary frames |
| 1819 | // that can confuse an asynchronous stack walker. This counter is |
| 1820 | // decremented at the end of unpack_frames(). |
| 1821 | current->inc_in_deopt_handler(); |
| 1822 | |
| 1823 | #if INCLUDE_JVMCI1 |
| 1824 | // JVMCI might need to get an exception from the stack, which in turn requires the register map to be valid |
| 1825 | RegisterMap reg_map(current, true); |
| 1826 | #else |
| 1827 | RegisterMap reg_map(current, false); |
| 1828 | #endif |
| 1829 | frame stub_frame = current->last_frame(); |
| 1830 | frame fr = stub_frame.sender(®_map); |
| 1831 | // Make sure the calling nmethod is not getting deoptimized and removed |
| 1832 | // before we are done with it. |
| 1833 | nmethodLocker nl(fr.pc()); |
| 1834 | |
| 1835 | // Log a message |
| 1836 | Events::log_deopt_message(current, "Uncommon trap: trap_request=" PTR32_FORMAT"0x%08" "x" " fr.pc=" INTPTR_FORMAT"0x%016" "l" "x" " relative=" INTPTR_FORMAT"0x%016" "l" "x", |
| 1837 | trap_request, p2i(fr.pc()), fr.pc() - fr.cb()->code_begin()); |
| 1838 | |
| 1839 | { |
| 1840 | ResourceMark rm; |
| 1841 | |
| 1842 | DeoptReason reason = trap_request_reason(trap_request); |
| 1843 | DeoptAction action = trap_request_action(trap_request); |
| 1844 | #if INCLUDE_JVMCI1 |
| 1845 | int debug_id = trap_request_debug_id(trap_request); |
| 1846 | #endif |
| 1847 | jint unloaded_class_index = trap_request_index(trap_request); // CP idx or -1 |
| 1848 | |
| 1849 | vframe* vf = vframe::new_vframe(&fr, ®_map, current); |
| 1850 | compiledVFrame* cvf = compiledVFrame::cast(vf); |
| 1851 | |
| 1852 | CompiledMethod* nm = cvf->code(); |
| 1853 | |
| 1854 | ScopeDesc* trap_scope = cvf->scope(); |
| 1855 | |
| 1856 | bool is_receiver_constraint_failure = COMPILER2_PRESENT(VerifyReceiverTypes &&)VerifyReceiverTypes && (reason == Deoptimization::Reason_receiver_constraint); |
| 1857 | |
| 1858 | if (TraceDeoptimization || is_receiver_constraint_failure) { |
| 1859 | tty->print_cr(" bci=%d pc=" INTPTR_FORMAT"0x%016" "l" "x" ", relative_pc=" INTPTR_FORMAT"0x%016" "l" "x" ", method=%s" JVMCI_ONLY(", debug_id=%d")", debug_id=%d", trap_scope->bci(), p2i(fr.pc()), fr.pc() - nm->code_begin(), trap_scope->method()->name_and_sig_as_C_string() |
| 1860 | #if INCLUDE_JVMCI1 |
| 1861 | , debug_id |
| 1862 | #endif |
| 1863 | ); |
| 1864 | } |
| 1865 | |
| 1866 | methodHandle trap_method(current, trap_scope->method()); |
| 1867 | int trap_bci = trap_scope->bci(); |
| 1868 | #if INCLUDE_JVMCI1 |
| 1869 | jlong speculation = current->pending_failed_speculation(); |
| 1870 | if (nm->is_compiled_by_jvmci()) { |
| 1871 | nm->as_nmethod()->update_speculation(current); |
| 1872 | } else { |
| 1873 | assert(speculation == 0, "There should not be a speculation for methods compiled by non-JVMCI compilers")do { if (!(speculation == 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 1873, "assert(" "speculation == 0" ") failed", "There should not be a speculation for methods compiled by non-JVMCI compilers" ); ::breakpoint(); } } while (0); |
| 1874 | } |
| 1875 | |
| 1876 | if (trap_bci == SynchronizationEntryBCI) { |
| 1877 | trap_bci = 0; |
| 1878 | current->set_pending_monitorenter(true); |
| 1879 | } |
| 1880 | |
| 1881 | if (reason == Deoptimization::Reason_transfer_to_interpreter) { |
| 1882 | current->set_pending_transfer_to_interpreter(true); |
| 1883 | } |
| 1884 | #endif |
| 1885 | |
| 1886 | Bytecodes::Code trap_bc = trap_method->java_code_at(trap_bci); |
| 1887 | // Record this event in the histogram. |
| 1888 | gather_statistics(reason, action, trap_bc); |
| 1889 | |
| 1890 | // Ensure that we can record deopt. history: |
| 1891 | // Need MDO to record RTM code generation state. |
| 1892 | bool create_if_missing = ProfileTraps || UseCodeAging RTM_OPT_ONLY( || UseRTMLocking )|| UseRTMLocking; |
| 1893 | |
| 1894 | methodHandle profiled_method; |
| 1895 | #if INCLUDE_JVMCI1 |
| 1896 | if (nm->is_compiled_by_jvmci()) { |
| 1897 | profiled_method = methodHandle(current, nm->method()); |
| 1898 | } else { |
| 1899 | profiled_method = trap_method; |
| 1900 | } |
| 1901 | #else |
| 1902 | profiled_method = trap_method; |
| 1903 | #endif |
| 1904 | |
| 1905 | MethodData* trap_mdo = |
| 1906 | get_method_data(current, profiled_method, create_if_missing); |
| 1907 | |
| 1908 | JFR_ONLY(post_deoptimization_event(nm, trap_method(), trap_bci, trap_bc, reason, action);)post_deoptimization_event(nm, trap_method(), trap_bci, trap_bc , reason, action); |
| 1909 | |
| 1910 | // Log a message |
| 1911 | Events::log_deopt_message(current, "Uncommon trap: reason=%s action=%s pc=" INTPTR_FORMAT"0x%016" "l" "x" " method=%s @ %d %s", |
| 1912 | trap_reason_name(reason), trap_action_name(action), p2i(fr.pc()), |
| 1913 | trap_method->name_and_sig_as_C_string(), trap_bci, nm->compiler_name()); |
| 1914 | |
| 1915 | // Print a bunch of diagnostics, if requested. |
| 1916 | if (TraceDeoptimization || LogCompilation || is_receiver_constraint_failure) { |
| 1917 | ResourceMark rm; |
| 1918 | ttyLocker ttyl; |
| 1919 | char buf[100]; |
| 1920 | if (xtty != NULL__null) { |
| 1921 | xtty->begin_head("uncommon_trap thread='" UINTX_FORMAT"%" "l" "u" "' %s", |
| 1922 | os::current_thread_id(), |
| 1923 | format_trap_request(buf, sizeof(buf), trap_request)); |
| 1924 | #if INCLUDE_JVMCI1 |
| 1925 | if (speculation != 0) { |
| 1926 | xtty->print(" speculation='" JLONG_FORMAT"%" "l" "d" "'", speculation); |
| 1927 | } |
| 1928 | #endif |
| 1929 | nm->log_identity(xtty); |
| 1930 | } |
| 1931 | Symbol* class_name = NULL__null; |
| 1932 | bool unresolved = false; |
| 1933 | if (unloaded_class_index >= 0) { |
| 1934 | constantPoolHandle constants (current, trap_method->constants()); |
| 1935 | if (constants->tag_at(unloaded_class_index).is_unresolved_klass()) { |
| 1936 | class_name = constants->klass_name_at(unloaded_class_index); |
| 1937 | unresolved = true; |
| 1938 | if (xtty != NULL__null) |
| 1939 | xtty->print(" unresolved='1'"); |
| 1940 | } else if (constants->tag_at(unloaded_class_index).is_symbol()) { |
| 1941 | class_name = constants->symbol_at(unloaded_class_index); |
| 1942 | } |
| 1943 | if (xtty != NULL__null) |
| 1944 | xtty->name(class_name); |
| 1945 | } |
| 1946 | if (xtty != NULL__null && trap_mdo != NULL__null && (int)reason < (int)MethodData::_trap_hist_limit) { |
| 1947 | // Dump the relevant MDO state. |
| 1948 | // This is the deopt count for the current reason, any previous |
| 1949 | // reasons or recompiles seen at this point. |
| 1950 | int dcnt = trap_mdo->trap_count(reason); |
| 1951 | if (dcnt != 0) |
| 1952 | xtty->print(" count='%d'", dcnt); |
| 1953 | ProfileData* pdata = trap_mdo->bci_to_data(trap_bci); |
| 1954 | int dos = (pdata == NULL__null)? 0: pdata->trap_state(); |
| 1955 | if (dos != 0) { |
| 1956 | xtty->print(" state='%s'", format_trap_state(buf, sizeof(buf), dos)); |
| 1957 | if (trap_state_is_recompiled(dos)) { |
| 1958 | int recnt2 = trap_mdo->overflow_recompile_count(); |
| 1959 | if (recnt2 != 0) |
| 1960 | xtty->print(" recompiles2='%d'", recnt2); |
| 1961 | } |
| 1962 | } |
| 1963 | } |
| 1964 | if (xtty != NULL__null) { |
| 1965 | xtty->stamp(); |
| 1966 | xtty->end_head(); |
| 1967 | } |
| 1968 | if (TraceDeoptimization) { // make noise on the tty |
| 1969 | tty->print("Uncommon trap occurred in"); |
| 1970 | nm->method()->print_short_name(tty); |
| 1971 | tty->print(" compiler=%s compile_id=%d", nm->compiler_name(), nm->compile_id()); |
| 1972 | #if INCLUDE_JVMCI1 |
| 1973 | if (nm->is_nmethod()) { |
| 1974 | const char* installed_code_name = nm->as_nmethod()->jvmci_name(); |
| 1975 | if (installed_code_name != NULL__null) { |
| 1976 | tty->print(" (JVMCI: installed code name=%s) ", installed_code_name); |
| 1977 | } |
| 1978 | } |
| 1979 | #endif |
| 1980 | tty->print(" (@" INTPTR_FORMAT"0x%016" "l" "x" ") thread=" UINTX_FORMAT"%" "l" "u" " reason=%s action=%s unloaded_class_index=%d" JVMCI_ONLY(" debug_id=%d")" debug_id=%d", |
| 1981 | p2i(fr.pc()), |
| 1982 | os::current_thread_id(), |
| 1983 | trap_reason_name(reason), |
| 1984 | trap_action_name(action), |
| 1985 | unloaded_class_index |
| 1986 | #if INCLUDE_JVMCI1 |
| 1987 | , debug_id |
| 1988 | #endif |
| 1989 | ); |
| 1990 | if (class_name != NULL__null) { |
| 1991 | tty->print(unresolved ? " unresolved class: " : " symbol: "); |
| 1992 | class_name->print_symbol_on(tty); |
| 1993 | } |
| 1994 | tty->cr(); |
| 1995 | } |
| 1996 | if (xtty != NULL__null) { |
| 1997 | // Log the precise location of the trap. |
| 1998 | for (ScopeDesc* sd = trap_scope; ; sd = sd->sender()) { |
| 1999 | xtty->begin_elem("jvms bci='%d'", sd->bci()); |
| 2000 | xtty->method(sd->method()); |
| 2001 | xtty->end_elem(); |
| 2002 | if (sd->is_top()) break; |
| 2003 | } |
| 2004 | xtty->tail("uncommon_trap"); |
| 2005 | } |
| 2006 | } |
| 2007 | // (End diagnostic printout.) |
| 2008 | |
| 2009 | if (is_receiver_constraint_failure) { |
| 2010 | fatal("missing receiver type check")do { (*g_assert_poison) = 'X';; report_fatal(INTERNAL_ERROR, "/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2010, "missing receiver type check"); ::breakpoint(); } while (0); |
| 2011 | } |
| 2012 | |
| 2013 | // Load class if necessary |
| 2014 | if (unloaded_class_index >= 0) { |
| 2015 | constantPoolHandle constants(current, trap_method->constants()); |
| 2016 | load_class_by_index(constants, unloaded_class_index, THREAD__the_thread__); |
| 2017 | } |
| 2018 | |
| 2019 | // Flush the nmethod if necessary and desirable. |
| 2020 | // |
| 2021 | // We need to avoid situations where we are re-flushing the nmethod |
| 2022 | // because of a hot deoptimization site. Repeated flushes at the same |
| 2023 | // point need to be detected by the compiler and avoided. If the compiler |
| 2024 | // cannot avoid them (or has a bug and "refuses" to avoid them), this |
| 2025 | // module must take measures to avoid an infinite cycle of recompilation |
| 2026 | // and deoptimization. There are several such measures: |
| 2027 | // |
| 2028 | // 1. If a recompilation is ordered a second time at some site X |
| 2029 | // and for the same reason R, the action is adjusted to 'reinterpret', |
| 2030 | // to give the interpreter time to exercise the method more thoroughly. |
| 2031 | // If this happens, the method's overflow_recompile_count is incremented. |
| 2032 | // |
| 2033 | // 2. If the compiler fails to reduce the deoptimization rate, then |
| 2034 | // the method's overflow_recompile_count will begin to exceed the set |
| 2035 | // limit PerBytecodeRecompilationCutoff. If this happens, the action |
| 2036 | // is adjusted to 'make_not_compilable', and the method is abandoned |
| 2037 | // to the interpreter. This is a performance hit for hot methods, |
| 2038 | // but is better than a disastrous infinite cycle of recompilations. |
| 2039 | // (Actually, only the method containing the site X is abandoned.) |
| 2040 | // |
| 2041 | // 3. In parallel with the previous measures, if the total number of |
| 2042 | // recompilations of a method exceeds the much larger set limit |
| 2043 | // PerMethodRecompilationCutoff, the method is abandoned. |
| 2044 | // This should only happen if the method is very large and has |
| 2045 | // many "lukewarm" deoptimizations. The code which enforces this |
| 2046 | // limit is elsewhere (class nmethod, class Method). |
| 2047 | // |
| 2048 | // Note that the per-BCI 'is_recompiled' bit gives the compiler one chance |
| 2049 | // to recompile at each bytecode independently of the per-BCI cutoff. |
| 2050 | // |
| 2051 | // The decision to update code is up to the compiler, and is encoded |
| 2052 | // in the Action_xxx code. If the compiler requests Action_none |
| 2053 | // no trap state is changed, no compiled code is changed, and the |
| 2054 | // computation suffers along in the interpreter. |
| 2055 | // |
| 2056 | // The other action codes specify various tactics for decompilation |
| 2057 | // and recompilation. Action_maybe_recompile is the loosest, and |
| 2058 | // allows the compiled code to stay around until enough traps are seen, |
| 2059 | // and until the compiler gets around to recompiling the trapping method. |
| 2060 | // |
| 2061 | // The other actions cause immediate removal of the present code. |
| 2062 | |
| 2063 | // Traps caused by injected profile shouldn't pollute trap counts. |
| 2064 | bool injected_profile_trap = trap_method->has_injected_profile() && |
| 2065 | (reason == Reason_intrinsic || reason == Reason_unreached); |
| 2066 | |
| 2067 | bool update_trap_state = (reason != Reason_tenured) && !injected_profile_trap; |
| 2068 | bool make_not_entrant = false; |
| 2069 | bool make_not_compilable = false; |
| 2070 | bool reprofile = false; |
| 2071 | switch (action) { |
| 2072 | case Action_none: |
| 2073 | // Keep the old code. |
| 2074 | update_trap_state = false; |
| 2075 | break; |
| 2076 | case Action_maybe_recompile: |
| 2077 | // Do not need to invalidate the present code, but we can |
| 2078 | // initiate another |
| 2079 | // Start compiler without (necessarily) invalidating the nmethod. |
| 2080 | // The system will tolerate the old code, but new code should be |
| 2081 | // generated when possible. |
| 2082 | break; |
| 2083 | case Action_reinterpret: |
| 2084 | // Go back into the interpreter for a while, and then consider |
| 2085 | // recompiling form scratch. |
| 2086 | make_not_entrant = true; |
| 2087 | // Reset invocation counter for outer most method. |
| 2088 | // This will allow the interpreter to exercise the bytecodes |
| 2089 | // for a while before recompiling. |
| 2090 | // By contrast, Action_make_not_entrant is immediate. |
| 2091 | // |
| 2092 | // Note that the compiler will track null_check, null_assert, |
| 2093 | // range_check, and class_check events and log them as if they |
| 2094 | // had been traps taken from compiled code. This will update |
| 2095 | // the MDO trap history so that the next compilation will |
| 2096 | // properly detect hot trap sites. |
| 2097 | reprofile = true; |
| 2098 | break; |
| 2099 | case Action_make_not_entrant: |
| 2100 | // Request immediate recompilation, and get rid of the old code. |
| 2101 | // Make them not entrant, so next time they are called they get |
| 2102 | // recompiled. Unloaded classes are loaded now so recompile before next |
| 2103 | // time they are called. Same for uninitialized. The interpreter will |
| 2104 | // link the missing class, if any. |
| 2105 | make_not_entrant = true; |
| 2106 | break; |
| 2107 | case Action_make_not_compilable: |
| 2108 | // Give up on compiling this method at all. |
| 2109 | make_not_entrant = true; |
| 2110 | make_not_compilable = true; |
| 2111 | break; |
| 2112 | default: |
| 2113 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2113); ::breakpoint(); } while (0); |
| 2114 | } |
| 2115 | |
| 2116 | // Setting +ProfileTraps fixes the following, on all platforms: |
| 2117 | // 4852688: ProfileInterpreter is off by default for ia64. The result is |
| 2118 | // infinite heroic-opt-uncommon-trap/deopt/recompile cycles, since the |
| 2119 | // recompile relies on a MethodData* to record heroic opt failures. |
| 2120 | |
| 2121 | // Whether the interpreter is producing MDO data or not, we also need |
| 2122 | // to use the MDO to detect hot deoptimization points and control |
| 2123 | // aggressive optimization. |
| 2124 | bool inc_recompile_count = false; |
| 2125 | ProfileData* pdata = NULL__null; |
| 2126 | if (ProfileTraps && CompilerConfig::is_c2_or_jvmci_compiler_enabled() && update_trap_state && trap_mdo != NULL__null) { |
| 2127 | assert(trap_mdo == get_method_data(current, profiled_method, false), "sanity")do { if (!(trap_mdo == get_method_data(current, profiled_method , false))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2127, "assert(" "trap_mdo == get_method_data(current, profiled_method, false)" ") failed", "sanity"); ::breakpoint(); } } while (0); |
| 2128 | uint this_trap_count = 0; |
| 2129 | bool maybe_prior_trap = false; |
| 2130 | bool maybe_prior_recompile = false; |
| 2131 | pdata = query_update_method_data(trap_mdo, trap_bci, reason, true, |
| 2132 | #if INCLUDE_JVMCI1 |
| 2133 | nm->is_compiled_by_jvmci() && nm->is_osr_method(), |
| 2134 | #endif |
| 2135 | nm->method(), |
| 2136 | //outputs: |
| 2137 | this_trap_count, |
| 2138 | maybe_prior_trap, |
| 2139 | maybe_prior_recompile); |
| 2140 | // Because the interpreter also counts null, div0, range, and class |
| 2141 | // checks, these traps from compiled code are double-counted. |
| 2142 | // This is harmless; it just means that the PerXTrapLimit values |
| 2143 | // are in effect a little smaller than they look. |
| 2144 | |
| 2145 | DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); |
| 2146 | if (per_bc_reason != Reason_none) { |
| 2147 | // Now take action based on the partially known per-BCI history. |
| 2148 | if (maybe_prior_trap |
| 2149 | && this_trap_count >= (uint)PerBytecodeTrapLimit) { |
| 2150 | // If there are too many traps at this BCI, force a recompile. |
| 2151 | // This will allow the compiler to see the limit overflow, and |
| 2152 | // take corrective action, if possible. The compiler generally |
| 2153 | // does not use the exact PerBytecodeTrapLimit value, but instead |
| 2154 | // changes its tactics if it sees any traps at all. This provides |
| 2155 | // a little hysteresis, delaying a recompile until a trap happens |
| 2156 | // several times. |
| 2157 | // |
| 2158 | // Actually, since there is only one bit of counter per BCI, |
| 2159 | // the possible per-BCI counts are {0,1,(per-method count)}. |
| 2160 | // This produces accurate results if in fact there is only |
| 2161 | // one hot trap site, but begins to get fuzzy if there are |
| 2162 | // many sites. For example, if there are ten sites each |
| 2163 | // trapping two or more times, they each get the blame for |
| 2164 | // all of their traps. |
| 2165 | make_not_entrant = true; |
| 2166 | } |
| 2167 | |
| 2168 | // Detect repeated recompilation at the same BCI, and enforce a limit. |
| 2169 | if (make_not_entrant && maybe_prior_recompile) { |
| 2170 | // More than one recompile at this point. |
| 2171 | inc_recompile_count = maybe_prior_trap; |
| 2172 | } |
| 2173 | } else { |
| 2174 | // For reasons which are not recorded per-bytecode, we simply |
| 2175 | // force recompiles unconditionally. |
| 2176 | // (Note that PerMethodRecompilationCutoff is enforced elsewhere.) |
| 2177 | make_not_entrant = true; |
| 2178 | } |
| 2179 | |
| 2180 | // Go back to the compiler if there are too many traps in this method. |
| 2181 | if (this_trap_count >= per_method_trap_limit(reason)) { |
| 2182 | // If there are too many traps in this method, force a recompile. |
| 2183 | // This will allow the compiler to see the limit overflow, and |
| 2184 | // take corrective action, if possible. |
| 2185 | // (This condition is an unlikely backstop only, because the |
| 2186 | // PerBytecodeTrapLimit is more likely to take effect first, |
| 2187 | // if it is applicable.) |
| 2188 | make_not_entrant = true; |
| 2189 | } |
| 2190 | |
| 2191 | // Here's more hysteresis: If there has been a recompile at |
| 2192 | // this trap point already, run the method in the interpreter |
| 2193 | // for a while to exercise it more thoroughly. |
| 2194 | if (make_not_entrant && maybe_prior_recompile && maybe_prior_trap) { |
| 2195 | reprofile = true; |
| 2196 | } |
| 2197 | } |
| 2198 | |
| 2199 | // Take requested actions on the method: |
| 2200 | |
| 2201 | // Recompile |
| 2202 | if (make_not_entrant) { |
| 2203 | if (!nm->make_not_entrant()) { |
| 2204 | return; // the call did not change nmethod's state |
| 2205 | } |
| 2206 | |
| 2207 | if (pdata != NULL__null) { |
| 2208 | // Record the recompilation event, if any. |
| 2209 | int tstate0 = pdata->trap_state(); |
| 2210 | int tstate1 = trap_state_set_recompiled(tstate0, true); |
| 2211 | if (tstate1 != tstate0) |
| 2212 | pdata->set_trap_state(tstate1); |
| 2213 | } |
| 2214 | |
| 2215 | #if INCLUDE_RTM_OPT1 |
| 2216 | // Restart collecting RTM locking abort statistic if the method |
| 2217 | // is recompiled for a reason other than RTM state change. |
| 2218 | // Assume that in new recompiled code the statistic could be different, |
| 2219 | // for example, due to different inlining. |
| 2220 | if ((reason != Reason_rtm_state_change) && (trap_mdo != NULL__null) && |
| 2221 | UseRTMDeopt && (nm->as_nmethod()->rtm_state() != ProfileRTM)) { |
| 2222 | trap_mdo->atomic_set_rtm_state(ProfileRTM); |
| 2223 | } |
| 2224 | #endif |
| 2225 | // For code aging we count traps separately here, using make_not_entrant() |
| 2226 | // as a guard against simultaneous deopts in multiple threads. |
| 2227 | if (reason == Reason_tenured && trap_mdo != NULL__null) { |
| 2228 | trap_mdo->inc_tenure_traps(); |
| 2229 | } |
| 2230 | } |
| 2231 | |
| 2232 | if (inc_recompile_count) { |
| 2233 | trap_mdo->inc_overflow_recompile_count(); |
| 2234 | if ((uint)trap_mdo->overflow_recompile_count() > |
| 2235 | (uint)PerBytecodeRecompilationCutoff) { |
| 2236 | // Give up on the method containing the bad BCI. |
| 2237 | if (trap_method() == nm->method()) { |
| 2238 | make_not_compilable = true; |
| 2239 | } else { |
| 2240 | trap_method->set_not_compilable("overflow_recompile_count > PerBytecodeRecompilationCutoff", CompLevel_full_optimization); |
| 2241 | // But give grace to the enclosing nm->method(). |
| 2242 | } |
| 2243 | } |
| 2244 | } |
| 2245 | |
| 2246 | // Reprofile |
| 2247 | if (reprofile) { |
| 2248 | CompilationPolicy::reprofile(trap_scope, nm->is_osr_method()); |
| 2249 | } |
| 2250 | |
| 2251 | // Give up compiling |
| 2252 | if (make_not_compilable && !nm->method()->is_not_compilable(CompLevel_full_optimization)) { |
| 2253 | assert(make_not_entrant, "consistent")do { if (!(make_not_entrant)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2253, "assert(" "make_not_entrant" ") failed", "consistent" ); ::breakpoint(); } } while (0); |
| 2254 | nm->method()->set_not_compilable("give up compiling", CompLevel_full_optimization); |
| 2255 | } |
| 2256 | |
| 2257 | } // Free marked resources |
| 2258 | |
| 2259 | } |
| 2260 | JRT_END} |
| 2261 | |
| 2262 | ProfileData* |
| 2263 | Deoptimization::query_update_method_data(MethodData* trap_mdo, |
| 2264 | int trap_bci, |
| 2265 | Deoptimization::DeoptReason reason, |
| 2266 | bool update_total_trap_count, |
| 2267 | #if INCLUDE_JVMCI1 |
| 2268 | bool is_osr, |
| 2269 | #endif |
| 2270 | Method* compiled_method, |
| 2271 | //outputs: |
| 2272 | uint& ret_this_trap_count, |
| 2273 | bool& ret_maybe_prior_trap, |
| 2274 | bool& ret_maybe_prior_recompile) { |
| 2275 | bool maybe_prior_trap = false; |
| 2276 | bool maybe_prior_recompile = false; |
| 2277 | uint this_trap_count = 0; |
| 2278 | if (update_total_trap_count) { |
| 2279 | uint idx = reason; |
| 2280 | #if INCLUDE_JVMCI1 |
| 2281 | if (is_osr) { |
| 2282 | idx += Reason_LIMIT; |
| 2283 | } |
| 2284 | #endif |
| 2285 | uint prior_trap_count = trap_mdo->trap_count(idx); |
| 2286 | this_trap_count = trap_mdo->inc_trap_count(idx); |
| 2287 | |
| 2288 | // If the runtime cannot find a place to store trap history, |
| 2289 | // it is estimated based on the general condition of the method. |
| 2290 | // If the method has ever been recompiled, or has ever incurred |
| 2291 | // a trap with the present reason , then this BCI is assumed |
| 2292 | // (pessimistically) to be the culprit. |
| 2293 | maybe_prior_trap = (prior_trap_count != 0); |
| 2294 | maybe_prior_recompile = (trap_mdo->decompile_count() != 0); |
| 2295 | } |
| 2296 | ProfileData* pdata = NULL__null; |
| 2297 | |
| 2298 | |
| 2299 | // For reasons which are recorded per bytecode, we check per-BCI data. |
| 2300 | DeoptReason per_bc_reason = reason_recorded_per_bytecode_if_any(reason); |
| 2301 | assert(per_bc_reason != Reason_none || update_total_trap_count, "must be")do { if (!(per_bc_reason != Reason_none || update_total_trap_count )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2301, "assert(" "per_bc_reason != Reason_none || update_total_trap_count" ") failed", "must be"); ::breakpoint(); } } while (0); |
| 2302 | if (per_bc_reason != Reason_none) { |
| 2303 | // Find the profile data for this BCI. If there isn't one, |
| 2304 | // try to allocate one from the MDO's set of spares. |
| 2305 | // This will let us detect a repeated trap at this point. |
| 2306 | pdata = trap_mdo->allocate_bci_to_data(trap_bci, reason_is_speculate(reason) ? compiled_method : NULL__null); |
| 2307 | |
| 2308 | if (pdata != NULL__null) { |
| 2309 | if (reason_is_speculate(reason) && !pdata->is_SpeculativeTrapData()) { |
| 2310 | if (LogCompilation && xtty != NULL__null) { |
| 2311 | ttyLocker ttyl; |
| 2312 | // no more room for speculative traps in this MDO |
| 2313 | xtty->elem("speculative_traps_oom"); |
| 2314 | } |
| 2315 | } |
| 2316 | // Query the trap state of this profile datum. |
| 2317 | int tstate0 = pdata->trap_state(); |
| 2318 | if (!trap_state_has_reason(tstate0, per_bc_reason)) |
| 2319 | maybe_prior_trap = false; |
| 2320 | if (!trap_state_is_recompiled(tstate0)) |
| 2321 | maybe_prior_recompile = false; |
| 2322 | |
| 2323 | // Update the trap state of this profile datum. |
| 2324 | int tstate1 = tstate0; |
| 2325 | // Record the reason. |
| 2326 | tstate1 = trap_state_add_reason(tstate1, per_bc_reason); |
| 2327 | // Store the updated state on the MDO, for next time. |
| 2328 | if (tstate1 != tstate0) |
| 2329 | pdata->set_trap_state(tstate1); |
| 2330 | } else { |
| 2331 | if (LogCompilation && xtty != NULL__null) { |
| 2332 | ttyLocker ttyl; |
| 2333 | // Missing MDP? Leave a small complaint in the log. |
| 2334 | xtty->elem("missing_mdp bci='%d'", trap_bci); |
| 2335 | } |
| 2336 | } |
| 2337 | } |
| 2338 | |
| 2339 | // Return results: |
| 2340 | ret_this_trap_count = this_trap_count; |
| 2341 | ret_maybe_prior_trap = maybe_prior_trap; |
| 2342 | ret_maybe_prior_recompile = maybe_prior_recompile; |
| 2343 | return pdata; |
| 2344 | } |
| 2345 | |
| 2346 | void |
| 2347 | Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 2348 | ResourceMark rm; |
| 2349 | // Ignored outputs: |
| 2350 | uint ignore_this_trap_count; |
| 2351 | bool ignore_maybe_prior_trap; |
| 2352 | bool ignore_maybe_prior_recompile; |
| 2353 | assert(!reason_is_speculate(reason), "reason speculate only used by compiler")do { if (!(!reason_is_speculate(reason))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2353, "assert(" "!reason_is_speculate(reason)" ") failed", "reason speculate only used by compiler" ); ::breakpoint(); } } while (0); |
| 2354 | // JVMCI uses the total counts to determine if deoptimizations are happening too frequently -> do not adjust total counts |
| 2355 | bool update_total_counts = true JVMCI_ONLY( && !UseJVMCICompiler)&& !UseJVMCICompiler; |
| 2356 | query_update_method_data(trap_mdo, trap_bci, |
| 2357 | (DeoptReason)reason, |
| 2358 | update_total_counts, |
| 2359 | #if INCLUDE_JVMCI1 |
| 2360 | false, |
| 2361 | #endif |
| 2362 | NULL__null, |
| 2363 | ignore_this_trap_count, |
| 2364 | ignore_maybe_prior_trap, |
| 2365 | ignore_maybe_prior_recompile); |
| 2366 | } |
| 2367 | |
| 2368 | Deoptimization::UnrollBlock* Deoptimization::uncommon_trap(JavaThread* current, jint trap_request, jint exec_mode) { |
| 2369 | // Enable WXWrite: current function is called from methods compiled by C2 directly |
| 2370 | MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current)); |
| 2371 | |
| 2372 | if (TraceDeoptimization) { |
| 2373 | tty->print("Uncommon trap "); |
| 2374 | } |
| 2375 | // Still in Java no safepoints |
| 2376 | { |
| 2377 | // This enters VM and may safepoint |
| 2378 | uncommon_trap_inner(current, trap_request); |
| 2379 | } |
| 2380 | HandleMark hm(current); |
| 2381 | return fetch_unroll_info_helper(current, exec_mode); |
| 2382 | } |
| 2383 | |
| 2384 | // Local derived constants. |
| 2385 | // Further breakdown of DataLayout::trap_state, as promised by DataLayout. |
| 2386 | const int DS_REASON_MASK = ((uint)DataLayout::trap_mask) >> 1; |
| 2387 | const int DS_RECOMPILE_BIT = DataLayout::trap_mask - DS_REASON_MASK; |
| 2388 | |
| 2389 | //---------------------------trap_state_reason--------------------------------- |
| 2390 | Deoptimization::DeoptReason |
| 2391 | Deoptimization::trap_state_reason(int trap_state) { |
| 2392 | // This assert provides the link between the width of DataLayout::trap_bits |
| 2393 | // and the encoding of "recorded" reasons. It ensures there are enough |
| 2394 | // bits to store all needed reasons in the per-BCI MDO profile. |
| 2395 | assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits")do { if (!(DS_REASON_MASK >= Reason_RECORDED_LIMIT)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2395, "assert(" "DS_REASON_MASK >= Reason_RECORDED_LIMIT" ") failed", "enough bits"); ::breakpoint(); } } while (0); |
| 2396 | int recompile_bit = (trap_state & DS_RECOMPILE_BIT); |
| 2397 | trap_state -= recompile_bit; |
| 2398 | if (trap_state == DS_REASON_MASK) { |
| 2399 | return Reason_many; |
| 2400 | } else { |
| 2401 | assert((int)Reason_none == 0, "state=0 => Reason_none")do { if (!((int)Reason_none == 0)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2401, "assert(" "(int)Reason_none == 0" ") failed", "state=0 => Reason_none" ); ::breakpoint(); } } while (0); |
| 2402 | return (DeoptReason)trap_state; |
| 2403 | } |
| 2404 | } |
| 2405 | //-------------------------trap_state_has_reason------------------------------- |
| 2406 | int Deoptimization::trap_state_has_reason(int trap_state, int reason) { |
| 2407 | assert(reason_is_recorded_per_bytecode((DeoptReason)reason), "valid reason")do { if (!(reason_is_recorded_per_bytecode((DeoptReason)reason ))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2407, "assert(" "reason_is_recorded_per_bytecode((DeoptReason)reason)" ") failed", "valid reason"); ::breakpoint(); } } while (0); |
| 2408 | assert(DS_REASON_MASK >= Reason_RECORDED_LIMIT, "enough bits")do { if (!(DS_REASON_MASK >= Reason_RECORDED_LIMIT)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2408, "assert(" "DS_REASON_MASK >= Reason_RECORDED_LIMIT" ") failed", "enough bits"); ::breakpoint(); } } while (0); |
| 2409 | int recompile_bit = (trap_state & DS_RECOMPILE_BIT); |
| 2410 | trap_state -= recompile_bit; |
| 2411 | if (trap_state == DS_REASON_MASK) { |
| 2412 | return -1; // true, unspecifically (bottom of state lattice) |
| 2413 | } else if (trap_state == reason) { |
| 2414 | return 1; // true, definitely |
| 2415 | } else if (trap_state == 0) { |
| 2416 | return 0; // false, definitely (top of state lattice) |
| 2417 | } else { |
| 2418 | return 0; // false, definitely |
| 2419 | } |
| 2420 | } |
| 2421 | //-------------------------trap_state_add_reason------------------------------- |
| 2422 | int Deoptimization::trap_state_add_reason(int trap_state, int reason) { |
| 2423 | assert(reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many, "valid reason")do { if (!(reason_is_recorded_per_bytecode((DeoptReason)reason ) || reason == Reason_many)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2423, "assert(" "reason_is_recorded_per_bytecode((DeoptReason)reason) || reason == Reason_many" ") failed", "valid reason"); ::breakpoint(); } } while (0); |
| 2424 | int recompile_bit = (trap_state & DS_RECOMPILE_BIT); |
| 2425 | trap_state -= recompile_bit; |
| 2426 | if (trap_state == DS_REASON_MASK) { |
| 2427 | return trap_state + recompile_bit; // already at state lattice bottom |
| 2428 | } else if (trap_state == reason) { |
| 2429 | return trap_state + recompile_bit; // the condition is already true |
| 2430 | } else if (trap_state == 0) { |
| 2431 | return reason + recompile_bit; // no condition has yet been true |
| 2432 | } else { |
| 2433 | return DS_REASON_MASK + recompile_bit; // fall to state lattice bottom |
| 2434 | } |
| 2435 | } |
| 2436 | //-----------------------trap_state_is_recompiled------------------------------ |
| 2437 | bool Deoptimization::trap_state_is_recompiled(int trap_state) { |
| 2438 | return (trap_state & DS_RECOMPILE_BIT) != 0; |
| 2439 | } |
| 2440 | //-----------------------trap_state_set_recompiled----------------------------- |
| 2441 | int Deoptimization::trap_state_set_recompiled(int trap_state, bool z) { |
| 2442 | if (z) return trap_state | DS_RECOMPILE_BIT; |
| 2443 | else return trap_state & ~DS_RECOMPILE_BIT; |
| 2444 | } |
| 2445 | //---------------------------format_trap_state--------------------------------- |
| 2446 | // This is used for debugging and diagnostics, including LogFile output. |
| 2447 | const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
| 2448 | int trap_state) { |
| 2449 | assert(buflen > 0, "sanity")do { if (!(buflen > 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2449, "assert(" "buflen > 0" ") failed", "sanity"); ::breakpoint (); } } while (0); |
| 2450 | DeoptReason reason = trap_state_reason(trap_state); |
| 2451 | bool recomp_flag = trap_state_is_recompiled(trap_state); |
| 2452 | // Re-encode the state from its decoded components. |
| 2453 | int decoded_state = 0; |
| 2454 | if (reason_is_recorded_per_bytecode(reason) || reason == Reason_many) |
| 2455 | decoded_state = trap_state_add_reason(decoded_state, reason); |
| 2456 | if (recomp_flag) |
| 2457 | decoded_state = trap_state_set_recompiled(decoded_state, recomp_flag); |
| 2458 | // If the state re-encodes properly, format it symbolically. |
| 2459 | // Because this routine is used for debugging and diagnostics, |
| 2460 | // be robust even if the state is a strange value. |
| 2461 | size_t len; |
| 2462 | if (decoded_state != trap_state) { |
| 2463 | // Random buggy state that doesn't decode?? |
| 2464 | len = jio_snprintf(buf, buflen, "#%d", trap_state); |
Value stored to 'len' is never read | |
| 2465 | } else { |
| 2466 | len = jio_snprintf(buf, buflen, "%s%s", |
| 2467 | trap_reason_name(reason), |
| 2468 | recomp_flag ? " recompiled" : ""); |
| 2469 | } |
| 2470 | return buf; |
| 2471 | } |
| 2472 | |
| 2473 | |
| 2474 | //--------------------------------statics-------------------------------------- |
| 2475 | const char* Deoptimization::_trap_reason_name[] = { |
| 2476 | // Note: Keep this in sync. with enum DeoptReason. |
| 2477 | "none", |
| 2478 | "null_check", |
| 2479 | "null_assert" JVMCI_ONLY("_or_unreached0")"_or_unreached0", |
| 2480 | "range_check", |
| 2481 | "class_check", |
| 2482 | "array_check", |
| 2483 | "intrinsic" JVMCI_ONLY("_or_type_checked_inlining")"_or_type_checked_inlining", |
| 2484 | "bimorphic" JVMCI_ONLY("_or_optimized_type_check")"_or_optimized_type_check", |
| 2485 | "profile_predicate", |
| 2486 | "unloaded", |
| 2487 | "uninitialized", |
| 2488 | "initialized", |
| 2489 | "unreached", |
| 2490 | "unhandled", |
| 2491 | "constraint", |
| 2492 | "div0_check", |
| 2493 | "age", |
| 2494 | "predicate", |
| 2495 | "loop_limit_check", |
| 2496 | "speculate_class_check", |
| 2497 | "speculate_null_check", |
| 2498 | "speculate_null_assert", |
| 2499 | "rtm_state_change", |
| 2500 | "unstable_if", |
| 2501 | "unstable_fused_if", |
| 2502 | "receiver_constraint", |
| 2503 | #if INCLUDE_JVMCI1 |
| 2504 | "aliasing", |
| 2505 | "transfer_to_interpreter", |
| 2506 | "not_compiled_exception_handler", |
| 2507 | "unresolved", |
| 2508 | "jsr_mismatch", |
| 2509 | #endif |
| 2510 | "tenured" |
| 2511 | }; |
| 2512 | const char* Deoptimization::_trap_action_name[] = { |
| 2513 | // Note: Keep this in sync. with enum DeoptAction. |
| 2514 | "none", |
| 2515 | "maybe_recompile", |
| 2516 | "reinterpret", |
| 2517 | "make_not_entrant", |
| 2518 | "make_not_compilable" |
| 2519 | }; |
| 2520 | |
| 2521 | const char* Deoptimization::trap_reason_name(int reason) { |
| 2522 | // Check that every reason has a name |
| 2523 | STATIC_ASSERT(sizeof(_trap_reason_name)/sizeof(const char*) == Reason_LIMIT)static_assert((sizeof(_trap_reason_name)/sizeof(const char*) == Reason_LIMIT), "sizeof(_trap_reason_name)/sizeof(const char*) == Reason_LIMIT" ); |
| 2524 | |
| 2525 | if (reason == Reason_many) return "many"; |
| 2526 | if ((uint)reason < Reason_LIMIT) |
| 2527 | return _trap_reason_name[reason]; |
| 2528 | static char buf[20]; |
| 2529 | sprintf(buf, "reason%d", reason); |
| 2530 | return buf; |
| 2531 | } |
| 2532 | const char* Deoptimization::trap_action_name(int action) { |
| 2533 | // Check that every action has a name |
| 2534 | STATIC_ASSERT(sizeof(_trap_action_name)/sizeof(const char*) == Action_LIMIT)static_assert((sizeof(_trap_action_name)/sizeof(const char*) == Action_LIMIT), "sizeof(_trap_action_name)/sizeof(const char*) == Action_LIMIT" ); |
| 2535 | |
| 2536 | if ((uint)action < Action_LIMIT) |
| 2537 | return _trap_action_name[action]; |
| 2538 | static char buf[20]; |
| 2539 | sprintf(buf, "action%d", action); |
| 2540 | return buf; |
| 2541 | } |
| 2542 | |
| 2543 | // This is used for debugging and diagnostics, including LogFile output. |
| 2544 | const char* Deoptimization::format_trap_request(char* buf, size_t buflen, |
| 2545 | int trap_request) { |
| 2546 | jint unloaded_class_index = trap_request_index(trap_request); |
| 2547 | const char* reason = trap_reason_name(trap_request_reason(trap_request)); |
| 2548 | const char* action = trap_action_name(trap_request_action(trap_request)); |
| 2549 | #if INCLUDE_JVMCI1 |
| 2550 | int debug_id = trap_request_debug_id(trap_request); |
| 2551 | #endif |
| 2552 | size_t len; |
| 2553 | if (unloaded_class_index < 0) { |
| 2554 | len = jio_snprintf(buf, buflen, "reason='%s' action='%s'" JVMCI_ONLY(" debug_id='%d'")" debug_id='%d'", |
| 2555 | reason, action |
| 2556 | #if INCLUDE_JVMCI1 |
| 2557 | ,debug_id |
| 2558 | #endif |
| 2559 | ); |
| 2560 | } else { |
| 2561 | len = jio_snprintf(buf, buflen, "reason='%s' action='%s' index='%d'" JVMCI_ONLY(" debug_id='%d'")" debug_id='%d'", |
| 2562 | reason, action, unloaded_class_index |
| 2563 | #if INCLUDE_JVMCI1 |
| 2564 | ,debug_id |
| 2565 | #endif |
| 2566 | ); |
| 2567 | } |
| 2568 | return buf; |
| 2569 | } |
| 2570 | |
| 2571 | juint Deoptimization::_deoptimization_hist |
| 2572 | [Deoptimization::Reason_LIMIT] |
| 2573 | [1 + Deoptimization::Action_LIMIT] |
| 2574 | [Deoptimization::BC_CASE_LIMIT] |
| 2575 | = {0}; |
| 2576 | |
| 2577 | enum { |
| 2578 | LSB_BITS = 8, |
| 2579 | LSB_MASK = right_n_bits(LSB_BITS)((((LSB_BITS) >= BitsPerWord) ? 0 : (OneBit << (LSB_BITS ))) - 1) |
| 2580 | }; |
| 2581 | |
| 2582 | void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, |
| 2583 | Bytecodes::Code bc) { |
| 2584 | assert(reason >= 0 && reason < Reason_LIMIT, "oob")do { if (!(reason >= 0 && reason < Reason_LIMIT )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2584, "assert(" "reason >= 0 && reason < Reason_LIMIT" ") failed", "oob"); ::breakpoint(); } } while (0); |
| 2585 | assert(action >= 0 && action < Action_LIMIT, "oob")do { if (!(action >= 0 && action < Action_LIMIT )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/runtime/deoptimization.cpp" , 2585, "assert(" "action >= 0 && action < Action_LIMIT" ") failed", "oob"); ::breakpoint(); } } while (0); |
| 2586 | _deoptimization_hist[Reason_none][0][0] += 1; // total |
| 2587 | _deoptimization_hist[reason][0][0] += 1; // per-reason total |
| 2588 | juint* cases = _deoptimization_hist[reason][1+action]; |
| 2589 | juint* bc_counter_addr = NULL__null; |
| 2590 | juint bc_counter = 0; |
| 2591 | // Look for an unused counter, or an exact match to this BC. |
| 2592 | if (bc != Bytecodes::_illegal) { |
| 2593 | for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { |
| 2594 | juint* counter_addr = &cases[bc_case]; |
| 2595 | juint counter = *counter_addr; |
| 2596 | if ((counter == 0 && bc_counter_addr == NULL__null) |
| 2597 | || (Bytecodes::Code)(counter & LSB_MASK) == bc) { |
| 2598 | // this counter is either free or is already devoted to this BC |
| 2599 | bc_counter_addr = counter_addr; |
| 2600 | bc_counter = counter | bc; |
| 2601 | } |
| 2602 | } |
| 2603 | } |
| 2604 | if (bc_counter_addr == NULL__null) { |
| 2605 | // Overflow, or no given bytecode. |
| 2606 | bc_counter_addr = &cases[BC_CASE_LIMIT-1]; |
| 2607 | bc_counter = (*bc_counter_addr & ~LSB_MASK); // clear LSB |
| 2608 | } |
| 2609 | *bc_counter_addr = bc_counter + (1 << LSB_BITS); |
| 2610 | } |
| 2611 | |
| 2612 | jint Deoptimization::total_deoptimization_count() { |
| 2613 | return _deoptimization_hist[Reason_none][0][0]; |
| 2614 | } |
| 2615 | |
| 2616 | // Get the deopt count for a specific reason and a specific action. If either |
| 2617 | // one of 'reason' or 'action' is null, the method returns the sum of all |
| 2618 | // deoptimizations with the specific 'action' or 'reason' respectively. |
| 2619 | // If both arguments are null, the method returns the total deopt count. |
| 2620 | jint Deoptimization::deoptimization_count(const char *reason_str, const char *action_str) { |
| 2621 | if (reason_str == NULL__null && action_str == NULL__null) { |
| 2622 | return total_deoptimization_count(); |
| 2623 | } |
| 2624 | juint counter = 0; |
| 2625 | for (int reason = 0; reason < Reason_LIMIT; reason++) { |
| 2626 | if (reason_str == NULL__null || !strcmp(reason_str, trap_reason_name(reason))) { |
| 2627 | for (int action = 0; action < Action_LIMIT; action++) { |
| 2628 | if (action_str == NULL__null || !strcmp(action_str, trap_action_name(action))) { |
| 2629 | juint* cases = _deoptimization_hist[reason][1+action]; |
| 2630 | for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { |
| 2631 | counter += cases[bc_case] >> LSB_BITS; |
| 2632 | } |
| 2633 | } |
| 2634 | } |
| 2635 | } |
| 2636 | } |
| 2637 | return counter; |
| 2638 | } |
| 2639 | |
| 2640 | void Deoptimization::print_statistics() { |
| 2641 | juint total = total_deoptimization_count(); |
| 2642 | juint account = total; |
| 2643 | if (total != 0) { |
| 2644 | ttyLocker ttyl; |
| 2645 | if (xtty != NULL__null) xtty->head("statistics type='deoptimization'"); |
| 2646 | tty->print_cr("Deoptimization traps recorded:"); |
| 2647 | #define PRINT_STAT_LINE(name, r) \ |
| 2648 | tty->print_cr(" %4d (%4.1f%%) %s", (int)(r), ((r) * 100.0) / total, name); |
| 2649 | PRINT_STAT_LINE("total", total); |
| 2650 | // For each non-zero entry in the histogram, print the reason, |
| 2651 | // the action, and (if specifically known) the type of bytecode. |
| 2652 | for (int reason = 0; reason < Reason_LIMIT; reason++) { |
| 2653 | for (int action = 0; action < Action_LIMIT; action++) { |
| 2654 | juint* cases = _deoptimization_hist[reason][1+action]; |
| 2655 | for (int bc_case = 0; bc_case < BC_CASE_LIMIT; bc_case++) { |
| 2656 | juint counter = cases[bc_case]; |
| 2657 | if (counter != 0) { |
| 2658 | char name[1*K]; |
| 2659 | Bytecodes::Code bc = (Bytecodes::Code)(counter & LSB_MASK); |
| 2660 | if (bc_case == BC_CASE_LIMIT && (int)bc == 0) |
| 2661 | bc = Bytecodes::_illegal; |
| 2662 | sprintf(name, "%s/%s/%s", |
| 2663 | trap_reason_name(reason), |
| 2664 | trap_action_name(action), |
| 2665 | Bytecodes::is_defined(bc)? Bytecodes::name(bc): "other"); |
| 2666 | juint r = counter >> LSB_BITS; |
| 2667 | tty->print_cr(" %40s: " UINT32_FORMAT"%" "u" " (%.1f%%)", name, r, (r * 100.0) / total); |
| 2668 | account -= r; |
| 2669 | } |
| 2670 | } |
| 2671 | } |
| 2672 | } |
| 2673 | if (account != 0) { |
| 2674 | PRINT_STAT_LINE("unaccounted", account); |
| 2675 | } |
| 2676 | #undef PRINT_STAT_LINE |
| 2677 | if (xtty != NULL__null) xtty->tail("statistics"); |
| 2678 | } |
| 2679 | } |
| 2680 | |
| 2681 | #else // COMPILER2_OR_JVMCI |
| 2682 | |
| 2683 | |
| 2684 | // Stubs for C1 only system. |
| 2685 | bool Deoptimization::trap_state_is_recompiled(int trap_state) { |
| 2686 | return false; |
| 2687 | } |
| 2688 | |
| 2689 | const char* Deoptimization::trap_reason_name(int reason) { |
| 2690 | return "unknown"; |
| 2691 | } |
| 2692 | |
| 2693 | jint Deoptimization::total_deoptimization_count() { |
| 2694 | return 0; |
| 2695 | } |
| 2696 | |
| 2697 | jint Deoptimization::deoptimization_count(const char *reason_str, const char *action_str) { |
| 2698 | return 0; |
| 2699 | } |
| 2700 | |
| 2701 | void Deoptimization::print_statistics() { |
| 2702 | // no output |
| 2703 | } |
| 2704 | |
| 2705 | void |
| 2706 | Deoptimization::update_method_data_from_interpreter(MethodData* trap_mdo, int trap_bci, int reason) { |
| 2707 | // no udpate |
| 2708 | } |
| 2709 | |
| 2710 | int Deoptimization::trap_state_has_reason(int trap_state, int reason) { |
| 2711 | return 0; |
| 2712 | } |
| 2713 | |
| 2714 | void Deoptimization::gather_statistics(DeoptReason reason, DeoptAction action, |
| 2715 | Bytecodes::Code bc) { |
| 2716 | // no update |
| 2717 | } |
| 2718 | |
| 2719 | const char* Deoptimization::format_trap_state(char* buf, size_t buflen, |
| 2720 | int trap_state) { |
| 2721 | jio_snprintf(buf, buflen, "#%d", trap_state); |
| 2722 | return buf; |
| 2723 | } |
| 2724 | |
| 2725 | #endif // COMPILER2_OR_JVMCI |