Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/oops/cpCache.cpp
src/share/vm/oops/cpCache.cpp
- changeset 4049
- 4bfe8b33cf66
- parent 4037
- da91efe96a93
- child 4133
- f6b0eb4e44cf
equal
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| 4048:11fb740ce98f | 4049:4bfe8b33cf66 |
|---|---|
| 241 method()->size_of_parameters()); | 241 method()->size_of_parameters()); |
| 242 set_bytecode_1(Bytecodes::_invokeinterface); | 242 set_bytecode_1(Bytecodes::_invokeinterface); |
| 243 } | 243 } |
| 244 | 244 |
| 245 | 245 |
| 246 void ConstantPoolCacheEntry::set_method_handle(methodHandle adapter, Handle appendix, | 246 void ConstantPoolCacheEntry::set_method_handle(constantPoolHandle cpool, |
| 247 methodHandle adapter, Handle appendix, | |
| 247 objArrayHandle resolved_references) { | 248 objArrayHandle resolved_references) { |
| 248 set_method_handle_common(Bytecodes::_invokehandle, adapter, appendix, resolved_references); | 249 set_method_handle_common(cpool, Bytecodes::_invokehandle, adapter, appendix, resolved_references); |
| 249 } | 250 } |
| 250 | 251 |
| 251 void ConstantPoolCacheEntry::set_dynamic_call(methodHandle adapter, Handle appendix, | 252 void ConstantPoolCacheEntry::set_dynamic_call(constantPoolHandle cpool, |
| 253 methodHandle adapter, Handle appendix, | |
| 252 objArrayHandle resolved_references) { | 254 objArrayHandle resolved_references) { |
| 253 set_method_handle_common(Bytecodes::_invokedynamic, adapter, appendix, resolved_references); | 255 set_method_handle_common(cpool, Bytecodes::_invokedynamic, adapter, appendix, resolved_references); |
| 254 } | 256 } |
| 255 | 257 |
| 256 void ConstantPoolCacheEntry::set_method_handle_common(Bytecodes::Code invoke_code, | 258 void ConstantPoolCacheEntry::set_method_handle_common(constantPoolHandle cpool, |
| 259 Bytecodes::Code invoke_code, | |
| 257 methodHandle adapter, | 260 methodHandle adapter, |
| 258 Handle appendix, | 261 Handle appendix, |
| 259 objArrayHandle resolved_references) { | 262 objArrayHandle resolved_references) { |
| 260 // NOTE: This CPCE can be the subject of data races. | 263 // NOTE: This CPCE can be the subject of data races. |
| 261 // There are three words to update: flags, refs[f2], f1 (in that order). | 264 // There are three words to update: flags, refs[f2], f1 (in that order). |
| 262 // Writers must store all other values before f1. | 265 // Writers must store all other values before f1. |
| 263 // Readers must test f1 first for non-null before reading other fields. | 266 // Readers must test f1 first for non-null before reading other fields. |
| 264 // Competing writers must acquire exclusive access on the first | 267 // Competing writers must acquire exclusive access via a lock. |
| 265 // write, to flags, using a compare/exchange. | 268 // A losing writer waits on the lock until the winner writes f1 and leaves |
| 266 // A losing writer to flags must spin until the winner writes f1, | 269 // the lock, so that when the losing writer returns, he can use the linked |
| 267 // so that when he returns, he can use the linked cache entry. | 270 // cache entry. |
| 271 | |
| 272 MonitorLockerEx ml(cpool->lock()); | |
| 273 if (!is_f1_null()) { | |
| 274 return; | |
| 275 } | |
| 268 | 276 |
| 269 bool has_appendix = appendix.not_null(); | 277 bool has_appendix = appendix.not_null(); |
| 270 | 278 |
| 271 // Write the flags. | 279 // Write the flags. |
| 272 bool owner = | 280 set_method_flags(as_TosState(adapter->result_type()), |
| 273 init_method_flags_atomic(as_TosState(adapter->result_type()), | |
| 274 ((has_appendix ? 1 : 0) << has_appendix_shift) | | 281 ((has_appendix ? 1 : 0) << has_appendix_shift) | |
| 275 ( 1 << is_final_shift), | 282 ( 1 << is_final_shift), |
| 276 adapter->size_of_parameters()); | 283 adapter->size_of_parameters()); |
| 277 if (!owner) { | |
| 278 // Somebody else is working on the same CPCE. Let them proceed. | |
| 279 while (is_f1_null()) { | |
| 280 // Pause momentarily on a low-level lock, to allow racing thread to win. | |
| 281 MutexLockerEx mu(Patching_lock, Mutex::_no_safepoint_check_flag); | |
| 282 os::yield(); | |
| 283 } | |
| 284 return; | |
| 285 } | |
| 286 | 284 |
| 287 if (TraceInvokeDynamic) { | 285 if (TraceInvokeDynamic) { |
| 288 tty->print_cr("set_method_handle bc=%d appendix="PTR_FORMAT"%s method="PTR_FORMAT" ", | 286 tty->print_cr("set_method_handle bc=%d appendix="PTR_FORMAT"%s method="PTR_FORMAT" ", |
| 289 invoke_code, | 287 invoke_code, |
| 290 (intptr_t)appendix(), (has_appendix ? "" : " (unused)"), | 288 (intptr_t)appendix(), (has_appendix ? "" : " (unused)"), |
