Installation and Set-Up | ||
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OProfile User Guide | Launching A Profile |
The easiest way to install the OProfile plug-in for Eclipse is through the ''Software Updates and Add-ons '' menu. For information on how to use this menu, refer to http://wiki.eclipse.org/Linux_Tools_Project/PluginInstallHelp#Installing_Updates_From_the_Linux_Tools_Update_Site.
Unlike most Eclipse plug-ins, the OProfile plug-in requires some configuration after installation. Note that this configuration process takes only a few simple steps, and only needs to be done once.
After the plug-in is first installed, performing a profile run with OProfile will bring up a dialog similar to the following:
As the dialog suggests, you must run the supplied install script; this script will allow the OProfile plug-in to perform OProfile tasks as root (since OProfile cannot be run as an unprivileged user). The steps below are the same as the dialog but described in more detail.
Open up a terminal and locate the
natives/linux/scripts
subdirectory, which is found in the
org.eclipse.linuxtools.oprofile.core
plug-in directory. The location of this plug-in directory depends on how you installed Eclipse.
~/.eclipse
. To find the exact location of the plug-in directory in this case, use the following command:
find ~/.eclipse -name 'org.eclipse.linuxtools.oprofile.core_*'
.tar.gz
from
http://www.eclipse.org/downloads/), then the plug-in will most likely be in the plugins
sub-directory of where you extracted it.
/home/ksebasti
, your Eclipse installation would be in
/home/ksebasti/eclipse
. In this case, you should use the following command to find the exact location of the plug-in directory:
find /home/ksebasti/eclipse -name 'org.eclipse.linuxtools.oprofile.core_*'
Note: In both cases, the quotes (') and asterisk (*) are necessary.
Sample output will look like this:
$ find /home/ksebasti/eclipse -name 'org.eclipse.linuxtools.oprofile.core_*' /home/ksebasti/eclipse/plugins/org.eclipse.linuxtools.oprofile.core_0.2.0.200904131051
Once you find the plug-in directory, navigate to its
natives/linux/scripts
subdirectory. Using our previous example:
$ cd /home/ksebasti/eclipse/plugins/org.eclipse.linuxtools.oprofile.core_0.2.0.200904131051/natives/linux/scripts
The
natives/linux/scripts
subdirectory contains the installation scripts you will need to run in order to allow OProfile to run as root.
The
natives/linux/scripts
subdirectory contains two scripts:
install.sh
and
install-noconsolehelper.sh
. Both scripts perform sanity checks to ensure OProfile is installed. The difference is in how root authentication with the plug-in is set up.
install.sh
uses the pluggable authentication modules (PAM) mechanism. This is the default and recommended method for root authentication. When an OProfile task is required, you will be presented with this dialog to enter the root password:
install-noconsolehelper.sh
can be used when consolehelper
is not present on the system, or if required PAM modules are not on the system. It uses the sudo mechanism and a small wrapper script. The install script will describe the text which should be written in the
sudoers
file, then run the command visudo
to edit it.
sudoers
file is a sensitive system file and altering it in other ways may lead to system instability. Only users with enough knowledge of running a Linux system should use this method. For these reasons, this method of root authentication is discouraged. However, it may be the only option available to some users and it has been tested to work by developers and users of the plug-in.
Once you have selected an install script, log in as root. Assuming you are in the
natives/linux/scripts
subdirectory of the plug-in directory (as in
Step 1 - Locate the Installation Scripts), run your selected install script:
# ./install.sh
Successful output will look like this:
./install.sh Eclipse-OProfile plugin install successful.
Either install script should be run as the root user since both scripts perform some actions that require elevated privileges:
install.sh
places files in
/etc
subdirectories, while
install-noconsolehelper.sh
runs the command visudo
. If you wish to simply run either install script without logging in as root, use:
su -c './install.sh'
This command will run only the install script as the root user, then return control to the regular user. Note that you will still need to enter the root password to make this work. If you receive an error message, refer to the Troubleshooting section.
After running the install script, restart Eclipse using File > Restart.
If you need to uninstall the plug-in, run the
uninstall.sh
or
uninstall-noconsolehelper.sh
script before uninstalling it from within Eclipse. These scripts are also located in the
natives/linux/scripts
subdirectory of the OProfile core plug-in directory (i.e. the same directory where the install scripts are found).
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OProfile User Guide | Launching A Profile |