interrupted-exception

问题 In kernel 2.6.11.5, divide zero exception handler is set up as: set_trap_gate(0,&divide_error); According to "Understanding The Linux Kernel", Intel trap gate cannot be accessed by a User Mode process. But it's quite possible that a user mode process also generate a divide_error . So why Linux implement it in this way? [Edit] I think that the question is still open, since set_trap_gate() sets DPL value of IDT entry to 0, which means only CPL=0 (read kernel) code can execute it, so it's

问题 In kernel 2.6.11.5, divide zero exception handler is set up as: set_trap_gate(0,&divide_error); According to "Understanding The Linux Kernel", Intel trap gate cannot be accessed by a User Mode process. But it's quite possible that a user mode process also generate a divide_error . So why Linux implement it in this way? [Edit] I think that the question is still open, since set_trap_gate() sets DPL value of IDT entry to 0, which means only CPL=0 (read kernel) code can execute it, so it's

问题 In kernel 2.6.11.5, divide zero exception handler is set up as: set_trap_gate(0,&divide_error); According to "Understanding The Linux Kernel", Intel trap gate cannot be accessed by a User Mode process. But it's quite possible that a user mode process also generate a divide_error . So why Linux implement it in this way? [Edit] I think that the question is still open, since set_trap_gate() sets DPL value of IDT entry to 0, which means only CPL=0 (read kernel) code can execute it, so it's

问题 I'm running two python threads ( import threading ). Both of them are blocked on a open() call; in fact they try to open named pipes in order to write in them, so it's a normal behaviour to block until somebody try to read from the named pipe. In short, it looks like: import threading def f(): open('pipe2', 'r') if __name__ == '__main__': t = threading.Thread(target=f) t.start() open('pipe1', 'r') When I type a ^C, the open() in the main thread is interrupted (raises IOError with errno == 4).

问题 When an interrupt comes to CPU, it is handled by saving current address location prior jumping into the handler if it is acknowledged. Otherwise it is ignored. I wonder whether an assembly instruction call is interrupted. For example, mvi a, 03h ; put 3 value into acc. in 8080 assembly Can be the one line instruction interrupted? Or if not, it is atomic?? Is there always a guarantee that "one line assembly instruction" is always atomic?? What if there is no "lock" keyword i.e. in 8080

问题 My epoll_wait fails due to EINTR. My gdb trace shows this: enter code here 221 in ../nptl/sysdeps/pthread/createthread.c (gdb) 224 in ../nptl/sysdeps/pthread/createthread.c (gdb) [New Thread 0x40988490 (LWP 3589)] 227 in ../nptl/sysdeps/pthread/createthread.c (gdb) epoll_wait error in start timer: Measurement will befor entire duration of execution epoll_wait: Interrupted system call [Thread 0x40988490 (LWP 3589) exited] This string "epoll_wait error in start timer: Measurement will befor

问题 In the below code snipped when dispose() is called, then the emitter thread is interrupted ( InterruptedException is thrown out of sleep method). Observable<Integer> obs = Observable.create(emitter -> { for (int i = 0; i < 10; i++) { if (emitter.isDisposed()) { System.out.println("> exiting."); emitter.onComplete(); return; } emitter.onNext(i); System.out.println("> calculation = " + i); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } emitter.onComplete()

问题 In Effective Java (page 275), there is this code segment: ... for (int i = 0; i < concurrency; i++) { executor.execute(new Runnable() { public void run() { ready.countDown(); try { start.await(); action.run(); } catch (InterruptedException e) { Thread.currentThread().interrupt(); } finally { done.countDown(); } } } ... What's the use of catching the interrupted exception just to re-raise it? Why not just let it fly? 回答1: The simple answer is that InterruptedException is a checked exception

问题 I have just created a process through an exec() call and I am now using its .waitFor() method. I need to catch an InterruptedException but I am not sure what I should place in the catch code block. I would like to receive the exit code but I won't if the current thread is interrupted. What should I do to get the exit code out of the process if the thread is interrupted? Example: import java.io.IOException; public class Exectest { public static void main(String args[]){ int exitval; try {

问题 I have this piece of code. A LinkedBlockingQueue should only throw an Exception if interrupted while waiting to add to the queue. But this queue is unbounded so it should add asap. Why does my shutdown methode throw an InterruptedException ? private final LinkedBlockingQueue<Message> messages= new LinkedBlockingQueue<Message>(); public void run(){ LinkedList<Message> messages = new LinkedList<Message>(); while (true){ try{ messages.clear(); messages.add(this.messages.take()); this.messages