Programming :: Std - Bad_alloc' What() - St9bad_alloc

Jan 28, 2010

I have a program suffering from bad memory allocation :

The Problem is I get "terminate called after throwing an instance of 'std::bad_alloc' what(): St9bad_alloc " error when I try to create huge numbers of packets in my program, I am using Message-Size from the trace file to determine the numbers of packets to be created for each object node, I am creating a mesh of 16 nodes here, which communicate to each other. With small number of messages the program runs fine. I am not sure if "delete previous" is the right way to free the memory..

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Programming :: 32-bit Executable Getting St9bad_alloc @ 3GB Mem Allocation

Jan 13, 2010

I'm maintaining a c++ application running on a 64-bit RHEL5 server w/32GB ram, but compiled to be a 32-bit executable with g++. The application handles large amounts of data, and has lately been throwing a st9bad_alloc exception. "top" shows the application as dieing right around when VIRT=~3GB, SWAP=~1.5GB and RES=~1.5GB. In the core dump I can see that it's consistently failing to push_back() a piece of data onto a std::vector (which already has hundreds of thousands of objects in it).

I know 4GB is the maximum address space for 32-bit applications. I've learned from this lwn article that a 32-bit kernel reserves 1GB of address space, leaving 3GB for user space. However I'm not running a 32-bit kernel, so that really doesn't answer anything.I wrote a dummy app which called malloc() over and over in a for loop, and it is able to allocate right up to the 4GB before it fails. I don't understand why this one seems to be able to allocate more.

The only difference between the two apps (besides malloc vs std::vector:ush_back), is that the 3GB crashing application attaches to 512mb of shared memory.Anyone have any ideas why this application would be crashing at 3GB? Is there any more diagnostics I should be doing? I would ultimately like to port this to 64-bit for a number of reasons, but it is a big undertaking for my organization, and I'd like to better understand what's going on here.

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Programming :: Terminate Called After Throwing An Instance Of 'std::bad_alloc'

Jul 13, 2010

I have written a code in which i have used vectors:

vector< vector<double> > arr;

x is a variable which is taken from a very beg text file > 64MB

first line of my code is
Wait Running...";

my code takes text file as an input, takes its data and generates an output text file....

Code is running fine for small data tried till x= 10

but while trying to run with large data ie x = 5000000 approx it is giving error
Even the first line of the code is not displayed. NOTE: variable is declared global but its size is defined in main.

The error that i am getting after approx 2-3 minutes is:

terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Wait Running...Aborted (core dumped)

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Programming :: 3D Programming - Difference Between JOGL And C++ OpenGL Programming?

Aug 27, 2010

I am interested in learning 3D programming. The thing is, I would hate to put too much effort to learn something that doesn't have future and is dying. My favorite language at the time is Java. My goal is professional programming.

So I have several questions:
1. Should I learn JOGL or start learning C++ and do C++ openGL programming?
2. Is there a big difference between JOGL and C++ openGL programming?
3. Is it worth to learn openGL? Does it have a future?
4. Is it a big difference between openGL and directX coding?
5. If choosing Java, then JOGL or LWJGL?

Why and what is the main difference between them?

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Programming :: Groovy Scripting - An Object-oriented Programming Language For The Java Platform ?

Mar 7, 2010

Groovy is an object-oriented programming language for the Java platform. I do not have experience in Java, only perl and shell scripts. Recently I have been asked to maintain a software written in groovy (also to make enhancements). So can I learn groovy without knowing java language. or isit I have to learn java before venturing into groovy.

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Programming :: Searching For Video Or Screen Cast Which Shows Device Driver Programming?

May 30, 2010

I did searched you tube but my results were not great.I have 2 books on KernelProgramming.I feel I need if some where I can get a video tutorial which can help me to understand how to develop a Linux Device driver that will be great.I had a look at Greg Kroah Hartmans video lecture of developing patches on ......I have been reading books and a lot of stuff.So I wish if I could get a video lecture that would be better

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Programming :: Timer In Socket Programming - Wait For X Sec After Read() And Then Disconnect The Client Connection

Mar 8, 2011

I have a server listening on incoming client connections. Once the client establishes SSL connection with the server, the server waits on read() from the client. Only Client can disconnect the connection. I want to have a timer in the server program to wait for x secs after read() and then disconnect the Client connection.

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Programming :: Totem Python Plugin Programming: Any Signal For Video Mouse Click?

Feb 9, 2011

I want that I click with the mouse on the video, it paused.I notice that there is "BaconVideoWidget" which I guess is the video rendering widget but it don't have signal named "clicked":

vd = totem_object.get_video_widget()
vd.connect("clicked", vd.hide)


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Programming :: Socket And Timer Programming - Server Doesn't Execute Any Msg Which Client Sent

May 16, 2011

i have a server program which accept multiple client connection and am using polling. like every 2 secs it will look to client whether any data is received after it binded. i have used setitimer but there is runtime error i got.. the server accept all client connection but doesn't execute any msg which client sent.


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Programming :: Headers From Richard Stevens Network Programming Book Not Installing

Oct 27, 2010

I am learning network programming via a book of Richard Stevens.The sample source codes are given here
I downloaded and unzipped the file in /usr/src folder.As per the instructions given in README of downloaded archive I did.

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Programming :: Unix Programming - Single Thread Server Can Support Exactly 2 Clients At Once

Sep 28, 2010

A simple TCP based chat server could allow users to use any TCP client (telnet, for example) to communicate with each other. For this question you should consider a single process, single thread server that can support exactly 2 clients at once, the server simply forwards whatever is sent from one client to the other (in both directions). Your server must not insist on any specific ordering of messages as soon as something is sent from one client it is immediately forwarded to the other client. As soon as either client terminates the connection the server can exit

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Programming :: Unable To Find Description Of Alsa's Programming Language

Dec 19, 2008

I am unable to find a description of alsa's programing language, this sort of stuff:


I need to know what, for example, 'ttable' means and what is its syntax. This seems to be a state secret.

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Programming :: Choice Of Programming Solutions For Collated Document Repository?

Feb 18, 2011

We have documents on multiple workstations and want to collate them into a single repository to provide text search and download. So far we have implemented rsync to copy files from each workstation under a directory for each workstation on a server (incidentally providing a backup) and have set up text search using Xapian with Omega; users access it via a web browser. Still to do is to set up a system to copy files from each workstation's area on the server to the repository.

Many files are duplicated. In these cases we want to preserve the names but keep a single copy of the file;hard links can be used for that.For each file to be copied from a workstation's area into the collated area we need to check whether it is a duplicate (file size and, if same, MD5 sum) and if so, create a hard link to the original rather than create a copy.A system to detect and replace duplicates in the collated area has been written using ruby and postgresql but the developer cannot commit to continuing this work. It does mean we have a postgresql database populated with "fingerprints" of files in the collated area.My first priority is to get the system working; in the longer term whatever is developed must be maintainable; I do not yet know which language skills are available locally.

I am fluent in bash and competent with awk. Ruby looks nice but I have started to learn python and do think it prudent to learn both at the same time. Python's postgresql capabilities are not settled but may be fine for the simple usage required.What to do? A bash solution would run very slowly but could be developed quickly. Language knowledge aside, I have found it difficult to install ruby on the server (CentOS 5.5;installed rvm but "gem" still not installed; seems a very complex system with its own package management).

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Programming :: Socket Programming While Displaying Received Message In File

May 11, 2011

i have problem in socket programming, while displaying received message in file,i got a problem... i cant able to write it in the file.... this is the code....

/* tcpserver.c */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>

now my problem is run time error i can able to create file but i cant able to write file....log.txt contain nothing.... as here i have give sample code... dont say not initialising function and all.... i have initialised , please only see func1() - my problem is only not able to write msg which i got received from the client..

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Programming :: C++ Programming With Simple RTAI Functions Outputing Words?

Apr 11, 2011

I need help as I am not proficient with Linux C++ Programming. There are two parts which I need to do in the coding provided below.

1. Produce the program so it can output the word "Hey there!" and wait two minute and print the word "See you later!".

2. Produce the program that will output the text "Cool" every 20 seconds by setting a periodic task.

#include <linux/kernel.h>
#include <linux/module.h>
int init_module(void)
printk("Hey there!


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Programming :: Programming Languages For Project Euler / Additional Ideas?

Jun 28, 2009

I've been working in the real world for a year making some money to go back and finish my masters, and now I'm coming to the end of my contract and am realising how little i remember and how small my scope has become; i basically do shell scripts and perl these days, and its making me uneasy. So instead of bitching about it , I'm going to endevor to complete Project Euler Using randomly generated programming languages for each problem, selected from

And post the fruits of my attempts at my blog (shameless plug) aswell as opening up my svn repository when I'm done. (altho i need to ask in another thread about svn permissions....)To my shame i havent ever touched C#, JavaScript, Ruby or Python, so all in all its going to be very interesting how much i screw up.Anyone have any additional ideas, or languages I'm missing or such? I was considering TCL or Haskell or Erlang at a strech, but i dont know how useful these three would be.

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Programming :: Use Socket Programming In Order To Implement Chatting Feature?

Aug 25, 2010

how to use socket programming in order to implement chatting feature

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Programming :: Termios Programming - Without Removing Carriage Return / Enter Key

Jun 30, 2010

I trying to write a UART(interfacing of serial devices) to linux machine but after I execute the following code to receive data I need to enter key (carriage return).... but I don't want to remove carriage return/enter key


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Programming :: Unix Programming - Single Process That Does Not Start Up Any Other Threads

Sep 28, 2010

i want a process that can operate as both a TCP echo server and a UDP echo server. The process can provide service to many clients at the same time, but involves a single process that does not start up any other threads.

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Programming :: Arrays In The C Programming Language Are Pointers To The First Element Of The Array?

Mar 27, 2010

I wonder why arrays in the C programming language are pointers to the first element of the array, not the first element of the array itself?

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Programming :: Design An Audio Chat Programming In Ubuntu

Apr 8, 2010

I want to design an audio chat programming in Ubuntu.So how shall I proceed? Any help on this please?I am complete novice in this topic. Currently my aim is to capture audio from microphone.

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Programming :: Bash Programming - Rename Files In A Loop?

Mar 31, 2011

I need to rename the resulted searched files from a loopI have the following code:

find . -name DOC* | while read i
find $i -type f -name '*.txt'

basically, I am searching for all txt files inside any folder starting with DOC name.this code is working fine with me.I need to rename those .txt files to .txtOLDOS: Ubuntu 10.4Bash shell

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Programming :: Build A Simple Program For C Programming Class?

Feb 12, 2011

im trying to build a simple program for my C programming class, this is the source code

#include <stdio.h>
int main()
int length, width, length, height, area, perimeter;
perimeter = width + length + height;
area = width * length + heigth;


i dont see any error (you might)but every time i run it it runs but after it asks me to input for the width i do it but it doesn't take me to the length, it just stays blank until i input another value in the same place for the width, it asks me for 4 inputs in total i don;t know why, and after i run it different times it gives me different values for the perimeter and are. how can I fix this?

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Programming :: Framework For Network Programming In C Language Just Like POCO In C++?

Mar 13, 2009

Is there any framework available for network programming in c language just like POCO in c++.

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Programming :: Socket Programming: Insertion Of 0x00 Into The Stream?

Dec 5, 2010

When sending data over the socket, the sending socket includes 0x00 after each sent byte. I wonder how this can be avoided -- I just want to transfer the data in the tx_buffer as it is.

# ./serv &
[1] 6895
# ./EUG
EUG: Data to be transmitted: 0x35 0x32 0x30 0xff 0x03 0x31
EUG: Data - #Bytes transmitted: 6
./serv: Here is the message: '5'


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Programming :: Pass Variable In Mysql Qyery In C Programming?

Dec 4, 2010

i want to pass variable in mysql qyery in c programming

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Programming :: OpenCV Programming - Highgui.h: No Such File Or Directory?

Jul 1, 2010

I installed OpenCV and am trying the example programs. When I try to compile like in the tutorial it is not finding highgui.h.I have 64 bit Mint if that helps at all

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Programming :: Paralel Port Kernel Module Programming

Jan 5, 2011

do you have any code to flash led lights with paralel port (device driver programming)or any lecture about this subject .if there is a working code this would be better ofcourse.

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Programming :: Shell Programming - Delete User Input

Jan 21, 2011

I recently started shell programming and my task now is to do a menu display.Currently i am stuck whereby user will input both title and author and it will delete it.

Do i have to use sed command?

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Programming :: Socket Programming Using Php - Swap A Client Ip And Port?

Mar 28, 2011

Is it possible to swap a client ip and port ? This is what I am trying to do. Let say you have Comp1 and Comp2 And you have Server between them. My goal is to get Comp1 and Comp2 know each others IP So Comp1 connects to server And server stores comp1's IP In a text file or other place And Comp2 connect to server And server also stores his info And then both comp1 and comp2 dowload the tex file And use the info on it.

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