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comparison src/share/vm/runtime/deoptimization.cpp @ 1253:f70b0d9ab095

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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop") Summary: Mark in PcDesc call sites which return oop and save the result oop across objects reallocation during deoptimization. Reviewed-by: never
author kvn
date Tue, 09 Feb 2010 01:31:13 -0800
parents 87684f1a88b5
children e3a4305c6bc3
comparison
equal deleted inserted replaced
1252:f516d5d7a019 1253:f70b0d9ab095
143 // relock objects if synchronization on them was eliminated. 143 // relock objects if synchronization on them was eliminated.
144 if (DoEscapeAnalysis) { 144 if (DoEscapeAnalysis) {
145 if (EliminateAllocations) { 145 if (EliminateAllocations) {
146 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames"); 146 assert (chunk->at(0)->scope() != NULL,"expect only compiled java frames");
147 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects(); 147 GrowableArray<ScopeValue*>* objects = chunk->at(0)->scope()->objects();
148
149 // The flag return_oop() indicates call sites which return oop
150 // in compiled code. Such sites include java method calls,
151 // runtime calls (for example, used to allocate new objects/arrays
152 // on slow code path) and any other calls generated in compiled code.
153 // It is not guaranteed that we can get such information here only
154 // by analyzing bytecode in deoptimized frames. This is why this flag
155 // is set during method compilation (see Compile::Process_OopMap_Node()).
156 bool save_oop_result = chunk->at(0)->scope()->return_oop();
157 Handle return_value;
158 if (save_oop_result) {
159 // Reallocation may trigger GC. If deoptimization happened on return from
160 // call which returns oop we need to save it since it is not in oopmap.
161 oop result = deoptee.saved_oop_result(&map);
162 assert(result == NULL || result->is_oop(), "must be oop");
163 return_value = Handle(thread, result);
164 assert(Universe::heap()->is_in_or_null(result), "must be heap pointer");
165 if (TraceDeoptimization) {
166 tty->print_cr("SAVED OOP RESULT " INTPTR_FORMAT " in thread " INTPTR_FORMAT, result, thread);
167 }
168 }
148 bool reallocated = false; 169 bool reallocated = false;
149 if (objects != NULL) { 170 if (objects != NULL) {
150 JRT_BLOCK 171 JRT_BLOCK
151 reallocated = realloc_objects(thread, &deoptee, objects, THREAD); 172 reallocated = realloc_objects(thread, &deoptee, objects, THREAD);
152 JRT_END 173 JRT_END
156 #ifndef PRODUCT 177 #ifndef PRODUCT
157 if (TraceDeoptimization) { 178 if (TraceDeoptimization) {
158 ttyLocker ttyl; 179 ttyLocker ttyl;
159 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread); 180 tty->print_cr("REALLOC OBJECTS in thread " INTPTR_FORMAT, thread);
160 print_objects(objects); 181 print_objects(objects);
161 } 182 }
162 #endif 183 #endif
184 }
185 if (save_oop_result) {
186 // Restore result.
187 deoptee.set_saved_oop_result(&map, return_value());
163 } 188 }
164 } 189 }
165 if (EliminateLocks) { 190 if (EliminateLocks) {
166 #ifndef PRODUCT 191 #ifndef PRODUCT
167 bool first = true; 192 bool first = true;