For example, in GDB we talk about breakpoints, watchpoints and core dumps etc. Similarly what are the 'must knows' in Valgrind?
P.S. I don't need any links to Valgrind manuals, I already have them.
I tried to install valgrind to my local directory (I don't have privilege to install it under root) by doing the following 3 steps:
(1) ./configure --prefix=/my/local/directory
(2) make
(3) make install
when I run
./valgrind ls -l
as instructed by README, I got this error: valgrind: failed to start tool 'memcheck' for platform 'x86-linux': No such file or directory
I am running Valgrind on my program. It shows me two errors but mentions only addresses against them and not actual code even on a debug build.
The output is
==23002== Memcheck, a memory error detector.
==23002== Copyright (C) 2002-2005, and GNU GPL'd, by Julian Seward et al.
==23002== Using LibVEX rev 1575, a library for dynamic binary translation.
[code]....
Can someone explain the concepts of IPoIB and TCP over infiniband? I understand the overall concept and data rates provided by native infiniband, but dont quite understand how TCP and IPoIB fit in. Why do u need them and what do they do? What is the difference when someone says their network uses native IB, IPoIB or TCP with infiniband? Which one is better? I am not from a strong networking background, so it would be nice if you could elaborate.
View 4 Replies View RelatedIm a begineer and there are a lot of gui concepts that have enlightened as well as confused me.
Xserver, metacity, compiz. Is there a simple step guide that will help me understand the GUi concepts in a simple yet fast manner? (considering I am a newbie)
I am a new, working on RHEL5. I am a bit confused on file permissions. I want to know how the setuid, setgid and sticky bit works on linux. And what are the advantages of using these bits? Can anyone explain me the main concepts of using these permissions?
View 4 Replies View RelatedWhat skills or concepts would you include in these three areas of Perl?
Perl Automation Test
Perl Development
Network Scripts / Programming
Could you make it look like a course contents so that I can check out those topics for the above three broad subjects of Perl?
i have written some really basic loadable kernel modules. There are a couple of concepts that i'll like to get cleared.
In a tutorial, the Makefile was given as follows-
obj-m += try.o
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
I understand that -C option of 'make' changes the current directory to /lib/modules/$(shell uname -r)/build (which depends on my kernel).
Now, my question is why to change to that particular directory? Also M=$(PWD) will hold the dir where i have written the module. Why is it required? What does 'modules' at the end of that line indicate?
Q2> We need to include <linux/module.h> and <linux/kernel.h> in a module. If i am right, the module uses kernel headers for these definitions. But how does 'make' find these definitions.
Q3> We are planning to write a custom scheduler for linux kernel. cat /sys/block/sda/queue/scheduler gives us the currently loaded schedulers. How do we expose our scheduler to linux kernel so that we can use it by switching to it.
differences between Valgrind and Frama-C. I need tools for debugging my C projects, which are getting too big and complicated to debug.
View 4 Replies View RelatedI have downloaded valgrind 3.6.1 from here. I want to install it, how to do it.How to install valgrind on xubuntu 11.04.This program is not in software center.I am already using code::blocks 10.05. Can i integrate it with codeblocks so that as i debug program in codeblocks valgrind called itself and show memory leaks.
View 4 Replies View RelatedFor some reason valgrind can't give an exact line number for memory leaks. I installed all of the debuginfo packages and I am compiling my program (gWaei) with the -g and -O1 flags. I just don't know anymore. Specifically the libwaei ones are worrying.
Code:
==26794== Memcheck, a memory error detector
==26794== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==26794== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info
[code]....
I am trying to run valgrind tool findout memleak for a executable which is run from start_daemon process..
View 4 Replies View RelatedI am running Valgrind on PowerPC target machine. I get the following error
Code:
==2848== Memcheck, a memory error detector.
==2848== Copyright (C) 2002-2008, and GNU GPL'd, by Julian Seward et al.
==2848== Using LibVEX rev 1884, a library for dynamic binary translation.
==2848== Copyright (C) 2004-2008, and GNU GPL'd, by OpenWorks LLP.
[code]...
I downloaded the source for the latest valgrind and ran ./configure. It quits saying:
Quote:
checking the GLIBC_VERSION version... unsupported version
configure: error: Valgrind requires glibc version 2.2 - 2.10
I've seen a slackbuild package for it. I'd like to have valgrind installed, but I'd prefer installing from source. Are unofficial packages the only way to go for the newest or newer release? EDIT: I meant to ask also, very important, what problems could arise from installing a slightly older version? I don't need a long, complex answer. Just off the top of your head, if it would be real stupid to do, let me know. I can google some time.
How can i get full command as and when a partially finish typing in Linux Command prompt. or is there a way i can get the command from history of commands executed automatically when i type instead of opening history and looking for the command?
View 7 Replies View RelatedI've tried instralling the c and c++ compilers on my fedora 13 machine and none of them seem to work. For example. i have this extremely simple c program that i try to compile and nothing works.
Code:
#include "stdio.h"
printf("Hello World");
[Code]....
I've written a for loop with a counter i and I want to use the value of i within sed to edit certain lines of text within a fortran file.I want the the x=10 will be replaced by x =1(counter from the loop).. and so on.But from the following code my x = 10 is replacing by x = i.So
I am getting error.
With the command "tail -300 /var/log/apache2/access.log | less" i can look in the log for the 300 latest visitors from my logfile. and i wanted to ask if it's possiblle to get that command to run from a php file and if yes how ?? how i run system commands in php? i use debian if it matters.
View 1 Replies View RelatedI'm learning GTK , and would like to use Codeblocks, and/or KDEvelop, and compile my c files using that, but always get an error about gtk/gtk.h not found, but can't figure out how to add the commands... I normally type gcc -o Program1 main.c `pkg-config --libs --cflags gtk+-2.0` That's a lot to type every time to compile.. Isn't there an easier way, in KDevelop, Monodevelop, and/or Codeblocks to make this step quicker, by adding some sort of I-/usr/include commands, or something?? thanks in advance, =). I looked online for some results, but didn't come across anything handy..
View 1 Replies View Relatedwant to set more text files. They have "tab" differently (3, 4, 6 or 5 characters space).I have to use "sed" or "awk" sette them in the same tab (for example five space haracters).
View 14 Replies View RelatedI am executing a run command in a script after that i need to copy files into a directory which are the inputs for the run,on run a new shell is created and the remaining commands in the script does not execute,wot should i do to execute the remaining commands in the script??
View 2 Replies View RelatedI am trying to administer a small group of ubuntu desktops in my classroom. I can use ssh to perform administrative tasks one at a time on each machine, but I want to automate these tasks through a small number of scripts. I am having trouble with running root commands through a script.
On other distros, I think I would simply ssh into the root account, and run the script. But as an ubuntu user, I have only ever used sudo, and folks at ubuntuforums are understandably hesitant to recommend logging in as root. Instead I am seeing suggestions to disable the password requirement for each specific command I want to run, which does not seem like best practice.
Should I enable the root account, give it a password, and ssh to the root account to run the scripts? To be specific, the scripts will do things like install updates, install programs, add or delete users, configure the desktop, etc.
Anyone know how to execute SQLite db commands from C++?
View 1 Replies View RelatedCode:
find . -name *.txt
Code:
find . -name *.txt
Where are the other BASH commands/exe stored? If the commands are part of the exe of BASH than ls would not be in a path, correct?
View 11 Replies View RelatedWhich is faster:
fread(&buf, 1, 1024, fp);
or
fread(&buf, 1024, 1, fp);
[code]...
i need to run a command from a shell script that requires me to answer "Yes" to 2 questions that the command asks before it kicks off. how do i do this? i thought it was something like this.. from inside the parent script:
sh test.sh << "EOF
Yes
Yes
[code]...
im pretty sure this is a remedial task for many of you but im having an issue with arrays from a shell script being accessed in an awk command. im pretty good with shell scripting but i am embarrassingly unfamiliar with awk. so here's the meat of the script...
Code:
I am trying to take an input file of ip addresses and corresponding netmasks and put it into a format to be loaded onto a juniper switch. the result should look something like this.. x.x.x.x/netmask using the cidr notation. no matter what subnet is provided though, /32 always gets appended to the end of the ip even when it should be /16, /24, etc... also, the cisco part works fine so that doesnt need any attention.
how to run a linux commands in shell programming using control structures.
View 1 Replies View RelatedIn below program I want to add (as part of the valid_cmds string) the pwd (print working directory), lo (logout), and cd (change directory) commands. However when I add those into original program ;
char *valid_cmds = " ls ps df pwd lo cd";
they are not working I have the cout message huh?
Original source code is below code...