Is there a way to hook calls to new/malloc, delete/free in C++? I tried the following methods: LD_PRELOAD -> fails for malloc, because dlsym seems to depend on malloc -Wl,--wrap,malloc -> doesn't work for 'new' gcc hooks -> doesn't work always, e.g. for uclibc there are no hooks Are there any other methods I could try?
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What is the real difference between system calls and normal function calls. Ultimately function calls too would be passed to kernel for some or the other work.
View 7 Replies View RelatedThe Opportonity to share Infos about upgrading and installing Stuff on Ubuntu Ok so i wasn't sure where to put this!!As i was a Windows User i used to call Landlines for free using Softwares such as :[URL].. Now i dont know How to use these Softwares in Ubuntu , I tried to Configure it through Wine Microsoft Windows Compatibility Layer . In case of Using Ekiga , I really don't know How to use it (as a Matter of Fact I tried to use it but i assume using it require an SIP-Account )
View 6 Replies View RelatedHow do you malloc a struct in C? I have a structure of the form:
Code:
typedef struct child_req_to_parent
{
[code]...
So far I have this:
Code:
int mm_init (mm_t *MM, int hm, int sz) {
int i;
[code]...
Code:
#include <stdio.h>
#include <stdlib.h>
[code]...
So the place where I'm having a problem is here:
Code:
typedef struct {
void **Mem_Chunk;
[code]...
I have encountered this scenario wherein malloc does not return.
Code:
char * tmp;
rs = 100 to 40000 bytes
[code]...
I am developing a code where I need to store the planes of an object in a tree & also i need to store it in a list for further processing ... when I try to allocate using malloc the memory allocation when i checked this in internet , I came to know that it may because the memory that I am trying to allocate may be more than the size_t variable.
View 9 Replies View RelatedOK so basically I have 3 partions on my 500 gb. hdd.
1. Windows 7 64-bit (375gb partion)
2. Ubuntu 9 (50gb partion)
3. Ubuntu 10(75gb partion)
Is there anyway I can remove Ubuntu 9 and allow Windows 7 to use that 50gb that was once used by Ubuntu 9.
Here is the code, which just creates a dynamic array? fills it? and prints.
At the end-point? when doing 'free(digits);' I get a debug messge. But the programm continues to work, or it crashes only on free?
How do I need to change the source-code, not to recieve a message from debugger?
I am new to C and linux. My code below does arbitary writes but I cant figure out where or how it does it.
I am calling the insertNode() function with seq = 'MISSISSPPI$' and alphabets = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ$'
Code:
Weird behaviour I should mention is that when I check for NULL pointer in node->child[index], the unassigned values are not null anymore, they point to arbitary memory.
I need to include variables in a system() call. This is that I have:
[code]#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace std;
[Code]....
P.S.: I know this is a pointless redundant program, but it's part of a larger project learning process.
I have a problem in making multiple calls using PJSIP. I registered different accounts that implements IAccount and added that in the CallManager. When i try to make the calls from the same CallManager, I could able to make the first call. When second call is made the first call got cut and it is alerting and the same for the thrid call..Could anyone help me in this regard.
Note: Calls has to be made from different numbers to different destinations. Is it possible to make multiple outbound calls simultaneously from the same instance of CallManager?
We recently ported an application over from IRIX to Linux, specifically SUSE Enterprise 11 and gcc (glibc 2.9). On IRIX there was a library trace utility call 'par' that allowed me to execute a C program and trace all the library calls it made, tracking how much time was spent in each call. I have been trying to find something similar for SUSE. I have found the ?trace programs (strace, ltrace, and ktrace) none of which is default installed on SUSE 11.Does any one have a suggestion on which ?trace to install and use or is there something else out there better?
View 1 Replies View RelatedI know there is a way to call winapi in runtime in windows. I want to ask how can I call a system call in gcc in runtime (when I don't know what it can be)? I don't mean syscall that I think is for calling only system calls and not library functions.
View 4 Replies View Relatedhow can I trace the method calls in Java during runtime?
View 1 Replies View RelatedI'm trying to write a C program that extends an array to any user inputed size.
Code:
if (arraysize == 0) {
arraysize = (int) pos + 1;
a = (int *) calloc (arraysize,sizeof(int));
for (i = 0 ; i < arraysize ; i++ )
a[i] = -1;
code....
The program dumps with that sequence of inputs everytime, but might dump an input before or after if different positions are requested. Interestingly, when I tested pos = 2000..2008, I got no dumps. So is realloc somehow trying to extend the array into bad space?
I am trying to port some "C" code from Solaris to Linux. I have a Dell PowerEdge R610 with an Intel Xeon E5504 quad core processor running Red Hat Linux Enterprise 5.3. I am compiling in 64 bit mode. I have managed to get the code compiled and linked, but when I attempt to execute it, I get a core dump in one of the C library calls (like strcpy or printf.)
I have a static library that contains our own code that makes the call to the C library. If I move the library method into the source file with the main method and rename it to be certain that I am executing my method instead of the method in our library, the call succeeds. Eventually another static library call is made that results in a core dump in the shared object. I compile my library code into a static library with gcc as:
[Code]....
I'm trying to produce a alphabetic, non-repetitive list of all System service calls in all c files located in a folder. Here's what I got so far.
grep -ow '[A-Za-z]*SYS[$][A-Za-z]*' *.c | sort
Which produces all system service calls in alphabetic order I just need to find out how to make it non-repetitive.
How does a C program start in linux? Is main() the first function called in the a c application by kernel. I understand it is the first called function written by the application programmer, but the question is to understand the what all kernel does and what all functions it calls before calling main()
View 9 Replies View RelatedI need to write script to look for the presence of memory allocation calls without corresponding calls to free the memory
View 5 Replies View RelatedI am working with fedora 6 , i386 architecture.I am trying to write on keyboard port via program.On inspation i come to know that 0x0060 to 0xz006f are used for keyboard in linux 2.6 kernel in the i/o space from kernel.
#include<sys/io.h>
#include<stdio.h>
#include</usr/lib/syslinux/com32/include/sys/io.h>
#include<unistd.h>
//#define
[Code]...
Have anyone used an email client that stays in sync with a free Hotmail account? I have setup Claws Mail but when I delete an email within the client it remains on the server. I remember this being the same for other email clients. Is there any client that will stay in sync? If I delete an email from within the client it will also be deleted from Hotmail's web bases interface.
View 4 Replies View RelatedI think the subject title says it all, but well... that's what I would like to do, to buy a TV tuner with support for HD resolution (although I'll be working with a 15.6" 16:9 1366x768 display, laptop one) to hook up a PS3 and not having to spend some extra cash on a display (ideally).
Can anyone give me a hint on this? The only 'premise' I ideally pursue is for the device to fully work, I mean... fuck DVB-T per se, I'm not interested in TV reception, just to put the A/V signal out of the PS3 and onto the tuner and use a program like tvtime (ideally), but something that can work reliably (even if I have to grab a tarball or a cvs/svn/git tree and compile it myself, as I use a custom-made+deviated CLFS/LFS distro, I'm more than accustomed to compile everything by hand).
I am a networking admin of a network running a mac osx server Running the Darwin 9.8.0 kernel. My goal is to get a firewall computer running ubuntu with the program IQfirewall. My networking hardware goes ( __ cat 5 cables)
*internet* _____DS1___ cisco router_____ a small switching hub___OSX server___a ProCurve switch ___ a cat 5 box____ routers ___ computers.
from what i have read I want the server to act like a gatway/firewall and sort of have the server forward packets to the OSX server.How would I get started. IQfirewall uses a GUI interface and I can later copy my rules if you would want to see them. it is based off of iptables
I need to write a script. In which, the 2nd part commands need to run under another bash shell environment.The enter_antoher_bash_env.sh will setup a new shell environment, call "bash". The rest commands need to run under the new env. (I cannot change this script too. )If I run these command one by one manually, it works of course. If I put them into a script, enter_another_bash_env.sh won't return because it calls "bash" command inside.
View 10 Replies View RelatedI have a Dell Inspiron 9300 and I recently installed Fedora 14. The computer has a built in Ethernet card, and I'm not sure about what exactly the card is, but I do know that I have a Wireless USB Netopia IEEE 802.11b (model # SWL-2300U) that worked fine on my XP, but now that I've changed over to Linux I can't seem to find this driver for Linux anywhere!
View 9 Replies View RelatedI'm having a really odd problem with my workspace switcher. First off, I keep 5 workspaces all in one row.
My problems: When I use the keyboard shortcuts Ctrl + Alt + Left or Ctrl + Alt + Right I can switch workspaces just fine, however I have a xbindkeys install set up to detect specific keypresses from my Logitech MX Revolution and spit out those very shortcuts, and they aren't working. When using the keyboard shortcuts to switch workspaces there's a new look to the visual aid that pops up in the middle of the screen. It's much boxier and ugly looking, and I'd like to get it back to the way it was before, with the larger boxes with rounded edges and no text. This started last night when I plugged my laptop into my Panasonic HDTV via S-Video. Can anyone tell me how to uninstall the workspace switcher component and reinstall it? I'm fairly new to Ubuntu and just want the default settings back. I'm running 10.04 btw.
For system calls, is blocking or non-blocking default in C? Simple question, just am not seeing the answer super quickly.
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