1)线程的一些局部变量和引用使用的内存属于Stack(栈)区,而普通的对象是存储在Heap(堆)区。 2)线程运行时,我们定义的TheadLocal对象被初始化,存储在Heap,同时线程运行的栈区保存了指向该实例的引用,也就是图中的ThreadLocalRef。 3)当ThreadLocal的set/get被调用时,JVM会根据当前线程的引用也就是CurrentThreadRef找...
Runnable target){}publicThread(Runnable target, String name){}publicThread(ThreadGroup group, Runnable target, String name){}publicThread(ThreadGroup group, Runnable target, String name,longstackSize){}
* Thread.stackSize = 4k 时 stack height:7837 * Thread.stackSize = 2k 时 stack height:7838 * Thread.stackSize = 1k 时 stack height:7831 * Thread.stackSize = 1 时 stack height:7836 (设置 -Xss512k, stack height= 7834) * * Thread.stackSize = 0 时 stack height:7839 (设置 -Xss512k...
TLS 块(Thread-Local Storage area):包含所有静态和动态 TLS 对象的私有副本,以及线程控制块(TCB)。 线程栈(Thread Stack):独立的堆栈区域,用于函数调用、局部变量等。 这两个区域通常是分开 mmap/分配的,且在 x86-64 上通过段寄存器(FS 或 GS)来访问 TLS,而通过 RSP/RBP 访问栈 fs寄存器切换 image.png im...
java privateThread(ThreadGroup g, Runnable target, String name,longstackSize, AccessControlContext acc,booleaninheritThreadLocals); 其中的一段源码截取如下: java if(name ==null) {thrownewNullPointerException("name cannot be null");}else{this.name = name;Thread parent = currentThread();SecurityManage...
Bad type on operand stack异常通常是由于字节码校验失败而引发的。字节码校验是Java虚拟机在加载类文件时进行的一项重要的安全检查。它确保字节码的类型安全性,以防止在运行时出现类型错误。 当Java字节码的操作数栈(operand stack)上的元素类型与字节码指令所期望的类型不匹配时,就会抛出Bad type on operand stack...
Get Thread Id UsingThread.getId()in Java In this example, we have created a classTaskthat implements theRunnableclass because we need itsrun()method to execute the thread. TheTaskclass takes a thread name from its constructor, and therun()method prints it on the console when it is executed...
构造Thread的时候传入stackSize代表着该线程占用的stack大小,如果没有指定stackSize的大小,默认是0,0代表着会忽略该参数,该参数会被JNI函数去使用,另外一个需要注意:该参数在一些平台有效,在有些平台则无效,所以平常要去设置stackSize一般通过jvm的参数-Xss10M(将虚拟机栈的大小写设置为10M),而不去通过线程的这个sta...
stackSize- the desired stack size for the new thread, or zero to indicate that this parameter is to be ignored. Throws: SecurityException- if the current thread cannot create a thread in the specified thread group Since: 1.4 Thread public Thread(ThreadGroupgroup,Runnabletarget,Stringname, lo...
关于Thread stack,这里强调一点:nid,native lwp id,即本地轻量级进程(即线程)ID。 Case 2: NIO中的Selector "qtp589745448-35 Selector0" prio=10 tid=0x00007f02f8ee9800 nid=0x18ed runnable [0x00007f02e71b4000] java.lang.Thread.State: RUNNABLE ...