runtime

I launch a child process in Java as follows: final String[] cmd = {"<childProcessName>"}; Process process = Runtime.getRuntime().exec(cmd); It now runs in the background. All good and fine. If my program now crashes (it is still in dev :-)) the child process still seems to hang around. How can I make it automatically end when the parent Java process dies? If it helps, I'm using Mac OS X 10.5 VonC As you said, addShutdownHook is the way to go. BUT: There's no real guarantee that your shutdown hooks are executed if the program terminates. Someone could kill the Java process and in that case your

This got a bit long-winded, so here's the quick version: Why does this cause a runtime TypeLoadException? (And should the compiler prevent me from doing it?) interface I { void Foo<T>(); } class C<T1> { public void Foo<T2>() where T2 : T1 { } } class D : C<System.Object>, I { } The exception occurs if you try to instantiate D. Longer, more exploratory version: Consider: interface I { void Foo<T>(); } class C<T1> { public void Foo<T2>() where T2 : T1 { } } class some_other_class { } class D : C<some_other_class>, I { } // compiler error CS0425 This is illegal because the type constraints on C

Does anybody know how to get memory size of the variable ( int , string , []struct , etc) and print it? Is it possible? var i int = 1 //I want to get something like this: fmt.Println("Size of i is: %?", i) //Also, it would be nice if I could store the value into a string You can use the unsafe.Sizeof function for this. It returns the size in bytes, occupied by the value you pass into it. Here's a working example : package main import "fmt" import "unsafe" func main() { a := int(123) b := int64(123) c := "foo" d := struct { FieldA float32 FieldB string }{0, "bar"} fmt.Printf("a: %T, %d\n", a,

I would like to replace the content of some methods at runtime. I know I can use javassist for this but it does not work because the classes I would like to enhance are already loaded by the system classLoader . How can I do, to replace the content of a method at runtime ? Should I try to unload the class ? How can I do that ? I saw it was possible but I could not figure out how to do it. If possible, I would like to avoid using an external lib for this, I would like to code it my-self. More information: - The class I would like to enhance is contained in a framework (in a jar file) - My code

For my small hobby project I need to emit machine code from C++ program in runtime. I have base address 0xDEADBEEF and want to write something like this: Assembler a((void*)0xDEADBEEF); a.Emit() << Push(Reg::Eax) << Push(Reg::Ebx) << Jmp(0xFEFEFEFE); Inline assembler isn't my choice because generated machine code is dependent of the program state. Does anybody know any existing library for doing this? If no, would it be a good idea to develop one from scratch and make it open source? (I mean, will anybody ever use this library if it existed?) You could use Nicolas Capen's softwire . Its really

可是，好像还是不行啊？CPU还是用了 10-20% 还得写这个随笔，怕自己关东西关多了，以后还得回复。 https://www.drivereasy.com/knowledge/runtime-broker-high-cpu-usage-windows-10/ 来源： https://www.cnblogs.com/johnsonshu/p/11452304.html

一、Ubuntu编译Android4.4.4 1.平台：realtek RTD2984（Android4.4.4） 　　第一次安装了ubuntu14.04.5，官网下载的iso，官网下的jar，编译android4.x需要安装jdk6，更高的版本会有问题，baidu到很多搭建环境的步骤，这个不多说，在win7下使用EasyBCD引导安装的ubuntu，1TB硬盘果断装了双系统，事实证明没删掉win7是个多么明智的决定，在jdk方面，android4.4比4.0要多配置一个javap，其他都一样 1 update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.6.0_43/bin/java" 1 2 update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.6.0_43/bin/javac" 1 3 update-alternatives --install "/usr/bin/javadoc" "javadoc" "/usr/lib/jvm/jdk1.6.0_43/bin/javadoc" 1 4 update-alternatives --install "/usr/lib/mozilla/plugins

I am reading about the go package "runtime" and see that i can among other (func GOMAXPROCS(n int)) set the number of CPU units that can be used to run my program. Can I force a goroutine to be run on a specific CPU of my choice? In modern Go, I wouldn't lock goroutines to threads for efficiency. Go 1.5 added goroutine scheduling affinity, to minimize how often goroutines switch between OS threads . And any cost of the remaining migrations between CPUs has to be weighed against the benefit of the user-mode scheduler avoiding context switches into kernel mode. Finally, when switching costs are

So I'm developing a rather large python project with a number of modules. The "main" (runnable) module is a daemon (a Thrift daemon, actually) which calls off to other modules for its actual functionality. Starting up the daemon takes a long time because some of the modules have a rather lengthy and involved initialization processes. So when I start the daemon, I wait... let's say... 2 minutes for everything to load, which isn't too bad in the grand scheme of things. However for development it becomes a major pain because I need to restart the daemon EVERY TIME which has been wasting a lot of