core

使用gdb调试应用程序segment fault

孤街浪徒 提交于 2020-01-06 19:35:26
1、在linux系统下打开core dump功能 首先在shell中输入ulimit –a确认core大小 上图core文件大小为0,表明默认没有coredump信息,这时需要修改系统配置文件。 如果不为 0 就跳过下面配置步骤。 修改 /etc/security/limits.conf 文件,增加core文件大小 在里面添加一行 这样就配置好了core大小。 2、运行gdb确认程序出错位置 下面以我自己写的一个程序为例,我在eclipse下新建了一个工程,应用程序内容如下: 图中标红的位置标明程序执行到这里会出错。 编译后在debug目录下能看到可执行程序。 然后在shell中执行会发现报段错误,此时在当前目录下产生了coredump文件 使用gdb查看coredump信息就能确定异常位置。 就能确定程序是在第20行出错了。 来源: CSDN 作者: Felven 链接: https://blog.csdn.net/jj12345jj198999/article/details/103846429

稳定工作和创业之间的抉择

最后都变了- 提交于 2020-01-06 02:58:51
早上写的文章《 回顾4180天在腾讯使用C#的历程,开启新的征途 》是我在腾讯写的最后一篇对过往10年在腾讯使用C#语言的总结,今天收到反馈有人在造谣腾讯开始去.net,我被迫辞职了。这非常的不负责任,我必须写这篇文章来辟谣。 要说腾讯开始去.net, 那么时间点可以追溯到2009年,这个在我的文章的.NET衰败时期打造TOF部分有说明,所以这一点完全不对的,在微软开源.NET Core后,腾讯是最早拥抱.net core的公司,腾讯用自己的linux操作系统tlinux,所有系统要求都跑在tlinux。目前腾讯内部还有很多团队把原来的.net程序迁移到.netcoe,而且腾讯的很多产品也很愿意支持.netcore,比如腾讯云 和 MIG 捐献给Linux基金会的Tars 。关于谣言部分就说到这里,我这里更想和大家聊聊稳定的工作和创业之间的抉择。 我在腾讯工作11年半,亲身体验了腾讯从5000人公司增长为50000人的公司,从一家小公司变成了一家大公司,大公司病在腾讯的身上已经出现。在腾讯工作,我拥有腾讯这样大公司的平台资源优势,这是公司所带给你的光环,因此很多人千方百计想进入腾讯。我在腾讯使用.NET Core的时间已经有2年,所在的团队使用.NET Core做了一些系统,腾讯内部像我们这样的团队有很多,大家首先都是用熟悉的工具完成KPI,很多人都没有时间好好的规划下

Alternate of GetUserManager in asp.net core

空扰寡人 提交于 2020-01-05 08:34:08
问题 I am converting an existing Asp.net Mvc project to .Net Core now the issue is this get method public ApplicationUserManager UserManager { get { return _userManager ?? HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>(); } private set { _userManager = value; } } In Mvc we could fetch OwinContext using HttpContext.GetOwinContext().GetUserManager() but in case of .Net Core GetOwinContext not present , When I compare definition of HttpContext of both classes HttpContextBase is

understanding the minesweeper programming p.roblem

纵然是瞬间 提交于 2020-01-05 08:09:27
问题 I am trying to understand the minesweeper problem: Problem statement: Have you ever played Minesweeper? This cute little game comes with a certain operating system whose name we can’t remember. The goal of the game is to find where all the mines are located within a M ×N field. The game shows a number in a square which tells you how many mines there are adjacent to that square. Each square has at most eight adjacent squares. The 4×4 field on the left contains two mines, each represented by a “ *

Two way databinding to singleton service Blazor Serverside

十年热恋 提交于 2020-01-05 04:34:28
问题 I have been playing with Blazor on the client using Webassembly quite a bit. But I thought I would try the serverside version now and I had a simple idea I wanted to try out. So my understading was that Blazor serverside uses SignalR to "push" out changes so that the client re-renders a part of its page. what I wanted to try was to databind to a property on a singleton service like this: @page "/counter" @inject DataService dataService <h1>Counter</h1> <p>Current count: @currentCount ok</p>

Asynchronous Http server in android

▼魔方 西西 提交于 2020-01-04 13:15:34
问题 I m implementing an asynchronous HTTP server in Android. I am using the code from link http://hc.apache.org/httpcomponents-core-ga/examples.html (Asynchronous HTTP server).. While compiling it I am getting the following error and application crashes: java.lang.IncompatibleClassChangeError:org.apache.http.params.SyncBasicHttpParams in the line HttpParams params = new SyncBasicHttpParams(); Please let me know the cause and how to resolve it? I am using the jars from httpcomponents-core-4.3

Generating unique int Id for my Java classes used as cache keys

浪子不回头ぞ 提交于 2020-01-04 05:25:27
问题 Can somebody suggest any approach to generate unique Id preferably integer for Java classes .I need to have each of my Java classes to have some kind of a unique Id which would be written via a serialization strategy to be used to get back the same class in a distributed set up . 回答1: Take a look at the UUID class. It has toString() function. You could take the hash of that value. 回答2: While not an integer, another way is to use SecureRandom: new BigInteger(130, new SecureRandom()).toString

【48】gdb 查看core堆栈信息

醉酒当歌 提交于 2020-01-04 00:13:04
1、查看系统资源设置情况 用户态程序Segmentation fault会生成core文件,如果没有生成core文件,则使用ulimit命令显示系统资源的设置,看看core文件大小设置,可以看到现在core file size是0,无法生成core文件 root@cd-106:~/pcieinject# ulimit unlimited root@cd-106:~/pcieinject# ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 319992 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t)

How to change core pattern only for a particular application?

浪子不回头ぞ 提交于 2020-01-03 16:44:50
问题 My application requires the core file to be generated in a specific pattern. How do I do this without affecting other processes? And how do I do this when /proc is read-only? 回答1: man core tells us: Piping core dumps to a program Since kernel 2.6.19, Linux supports an alternate syntax for the /proc/sys/kernel/core_pattern file. If the first character of this file is a pipe symbol ( | ), then the remainder of the line is interpreted as a program to be executed. Instead of being written to a

abp(net core)+easyui+efcore实现仓储管理系统——ABP WebAPI与EasyUI结合增删改查之七(三十三)

我们两清 提交于 2020-01-02 22:05:48
abp(net core)+easyui+efcore实现仓储管理系统目录 abp(net core)+easyui+efcore实现仓储管理系统——ABP总体介绍(一) abp(net core)+easyui+efcore实现仓储管理系统——解决方案介绍(二) abp(net core)+easyui+efcore实现仓储管理系统——领域层创建实体(三) abp(net core)+easyui+efcore实现仓储管理系统——定义仓储并实现 (四) abp(net core)+easyui+efcore实现仓储管理系统——创建应用服务(五) abp(net core)+easyui+efcore实现仓储管理系统——展现层实现增删改查之控制器(六) abp(net core)+easyui+efcore实现仓储管理系统——展现层实现增删改查之列表视图(七) abp(net core)+easyui+efcore实现仓储管理系统——展现层实现增删改查之增删改视图(八) abp(net core)+easyui+efcore实现仓储管理系统——展现层实现增删改查之菜单与测试(九) abp(net core)+easyui+efcore实现仓储管理系统——多语言(十) abp(net core)+easyui+efcore实现仓储管理系统——使用 WEBAPI实现CURD (十一)