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src/hotspot/share/services/memoryPool.cpp

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*** 75,85 **** // It creates a MemoryPool instance when the first time // this function is called. instanceOop MemoryPool::get_memory_pool_instance(TRAPS) { // Must do an acquire so as to force ordering of subsequent // loads from anything _memory_pool_obj points to or implies. ! instanceOop pool_obj = OrderAccess::load_acquire(&_memory_pool_obj); if (pool_obj == NULL) { // It's ok for more than one thread to execute the code up to the locked region. // Extra pool instances will just be gc'ed. InstanceKlass* ik = Management::sun_management_ManagementFactoryHelper_klass(CHECK_NULL); --- 75,85 ---- // It creates a MemoryPool instance when the first time // this function is called. instanceOop MemoryPool::get_memory_pool_instance(TRAPS) { // Must do an acquire so as to force ordering of subsequent // loads from anything _memory_pool_obj points to or implies. ! instanceOop pool_obj = Atomic::load_acquire(&_memory_pool_obj); if (pool_obj == NULL) { // It's ok for more than one thread to execute the code up to the locked region. // Extra pool instances will just be gc'ed. InstanceKlass* ik = Management::sun_management_ManagementFactoryHelper_klass(CHECK_NULL);
*** 116,126 **** // _memory_pool_obj here because some other thread may have // initialized it while we were executing the code before the lock. // // The lock has done an acquire, so the load can't float above it, // but we need to do a load_acquire as above. ! pool_obj = OrderAccess::load_acquire(&_memory_pool_obj); if (pool_obj != NULL) { return pool_obj; } // Get the address of the object we created via call_special. --- 116,126 ---- // _memory_pool_obj here because some other thread may have // initialized it while we were executing the code before the lock. // // The lock has done an acquire, so the load can't float above it, // but we need to do a load_acquire as above. ! pool_obj = Atomic::load_acquire(&_memory_pool_obj); if (pool_obj != NULL) { return pool_obj; } // Get the address of the object we created via call_special.
*** 128,138 **** // Use store barrier to make sure the memory accesses associated // with creating the pool are visible before publishing its address. // The unlock will publish the store to _memory_pool_obj because // it does a release first. ! OrderAccess::release_store(&_memory_pool_obj, pool_obj); } } return pool_obj; } --- 128,138 ---- // Use store barrier to make sure the memory accesses associated // with creating the pool are visible before publishing its address. // The unlock will publish the store to _memory_pool_obj because // it does a release first. ! Atomic::release_store(&_memory_pool_obj, pool_obj); } } return pool_obj; }
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