inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); } inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, ji...
Java是一门安全的语言,当访问对象为NULL时必须抛出对应的空指针异常。在每次访问对象前,虚拟机必须检查对象是否为NULL。 空检查消除优化(Null Check Elimination)会尝试消除一些显式的空检查,或者将它们替换为隐式检查。如果可以证明对象不为NULL,比如同时访问对象两次,第一次已经检查过,那么第二次检查就可以消除。 值...
CASE(_monitorenter):{//锁对象oop lockee=STACK_OBJECT(-1);// derefing's lockee ought to provoke implicit null checkCHECK_NULL(lockee);// 步骤1// 在栈中找到第一个空闲的Lock Record// 会找到栈中最高的BasicObjectLock*limit=istate->monitor_base();BasicObjectLock*most_recent=(BasicObjectLoc...
6478991hotspotcompiler1C1 NullCheckEliminator yields incorrect exceptions 7057120hotspotcompiler1Tiered: Allow C1 to inline methods with loops 7060619hotspotcompiler1C1 should respect inline and dontinline directives from CompilerOracle 7079673hotspotcompiler1JSR 292: C1 should inline bytecoded method handle ...
Inlining is synergistic with other code optimizations, because it makes them more effective. As the Java HotSpot compiler matures, the ability to operate on large, inlined blocks of code will open the door to a host of even more advanced optimizations in the future. ...
inline u2 next_method_idnum(); void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } // generics support Symbol* generic_signature() const { return (_generic_signature_index == 0) ? (Symbol*)NULL : _constants->symbol_at(_generic_signature_index); ...
If the handler is not null and there is a security manager, the security manager's checkPermission method is called with a NetPermission("specifyStreamHandler") permission. This may result in a SecurityException. No validation of the inputs is performed by this constructor. Java documentation for...
提交 .azure-pipelines use MicroBuild to sign extension (#1541) 2个月前 .github Changes that will allow an array of envFile locations to be defined (#1506) 8个月前 .vscode Provide a setting to control whether to support debugging on decompile… ...
(orderId==null?0:orderId.hashCode()) ^ ((int) itemId) ); } public String toString() { return "" + orderId + "-" + itemId; } } Multiplicity in Entity Relationships Multiplicities are of the following types: one-to-one, one-to-many, many-to-one, and many-to-many: ...
(objects allocated back-to-back, in particular). This could potentially// result in hashtable collisions and reduced hashtable efficiency.// There are simple ways to "diffuse" the middle address bits over the// generated hashCode values://static inline intptr_tget_next_hash(Thread*Self,oop ...