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Here are some tools that you might find useful while developing code.
Tags are an index to the functions and global variables declared in a
program. Many editors, including Emacs and vi, can use
them. The Makefile
in pintos/src
produces Emacs-style
tags with the command make TAGS or vi-style tags with
make tags.
In Emacs, use M-. to follow a tag in the current window, C-x 4 . in a new window, or C-x 5 . in a new frame. If your cursor is on a symbol name for any of those commands, it becomes the default target. If a tag name has multiple definitions, M-0 M-. jumps to the next one. To jump back to where you were before you followed the last tag, use M-*.
The cscope program also provides an index to functions and
variables declared in a program. It has some features that tag
facilities lack. Most notably, it can find all the points in a
program at which a given function is called.
The Makefile
in pintos/src
produces cscope
indexes when it is invoked as make cscope. Once the index has
been generated, run cscope from a shell command line; no
command-line arguments are normally necessary. Then use the arrow
keys to choose one of the search criteria listed near the bottom of
the terminal, type in an identifier, and hit Enter.
cscope will then display the matches in the upper part of
the terminal. You may use the arrow keys to choose a particular
match; if you then hit Enter, cscope will invoke the
default system editor(9) and position the
cursor on that match. To start a new search, type Tab. To exit
cscope, type Ctrl-d.
Emacs and some versions of vi have their own interfaces to
cscope. For information on how to use these interface,
visit http://cscope.sourceforge.net, the cscope home
page.
CVS is a version-control system. That is, you can use it to keep track of multiple versions of files. The idea is that you do some work on your code and test it, then check it into the version-control system. If you decide that the work you've done since your last check-in is no good, you can easily revert to the last checked-in version. Furthermore, you can retrieve any old version of your code as of some given day and time. The version control logs tell you who made changes and when.
CVS is not the best version control system out there, but it's free, it's fairly easy to use, and it's already installed in most Unix-like environments.
For more information, visit the CVS home page.
As of 2012, we recommend you use git. We will set up an upstream repository to distribute the provided code. We will commit any needed updates to this master repository. You should clone this repository.
To share work among team members, use NFSv4 ACLs to allow each other access to your repositories.
VNC stands for Virtual Network Computing. It is, in essence, a remote display system which allows you to view a computing "desktop" environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. It is already installed on the lab machines. For more information, look at the VNC Home Page.
Cygwin provides a Linux-compatible environment for Windows. It includes ssh client and an X11 server, Cygwin/X. If your primary work environment is Windows, you will find Cygwin/X extremely useful for these projects. Install Cygwin/X, then start the X server and open a new xterm. The X11 server also allows you to run pintos while displaying the bochs- or qemu-emulated console on your Windows desktop.
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