-( The FreeRADIUS web site is at <URL: http://www.freeradius.org/>, and
-most information referenced in this document can be found there.
+BUGS
-This is primarily for non-developers of the FreeRADIUS server. If you are
-able to patch the code to work correctly, then we invite you to join the
-development list to discuss it. If you're the type who know little about
-how to code, then this is the place for you!
+0.INTRODUCTION
+ The FreeRADIUS web site is at <URL: http://www.freeradius.org>, and
+ most information referenced in this document can be found there.
-= So you think you've found a bug in the FreeRADIUS server
+ This is primarily for non-developers of the FreeRADIUS server. If you are
+ able to patch the code to work correctly, then we invite you to join the
+ development list to discuss it. If you're the type who know little about
+ how to code, then this is the place for you!
-You should first discuss it on the users list, to see if anyone can
-reproduce it. Often there's a simple explanation of why the server
-behaves as it does, and it's not necessarily a bug in the code, so
-browse the lists' archives of the last two months, and if you don't
-see messages about it, ask!
+1.YOU FOUND A BUG
-If the behavior is correct but confusing, we think that's a bug too, and
-you should file a bug against our documentation.
+ So you think you've found a bug in the FreeRADIUS server?
+ You should first discuss it on the users list, to see if anyone can
+ reproduce it. Often there's a simple explanation of why the server
+ behaves as it does, and it's not necessarily a bug in the code, so
+ browse the lists' archives of the last two months, and if you don't
+ see messages about it, ask!
-= Looking at core dumps
+ If the behavior is correct but confusing, we think that's a bug too, and
+ you should file a bug against our documentation.
-If the server, or one of the accompyaning programs core dumps, then
-you should rebuild the server as follows:
+ For more information about the users list, the lists' archives and the
+ faq, please visit http://www.freeradius.org/list/users.html
+ Please make sure to READ and RESPECT the house-rules. You will get much
+ better response and much faster if you do!
-$ ./configure --enable-developer
-$ make
-$ make install
+2.CORE DUMPS
- and then run the program again. You may have to to enable core
+ If the server, or one of the accompyaning programs core dumps, then
+ you should rebuild the server as follows:
+
+ $ ./configure --enable-developer
+ $ make
+ $ make install
+
+ and then run the program again. You may have to to enable core
dumps, via:
-$ ulimit -c unlimited
+ $ ulimit -c unlimited
When it core dumps, do:
-$ gdb /path/to/executable /path/to/core/file
+ $ gdb /path/to/executable /path/to/core/file
+
+ Enable logging in gdb via the following commands:
+
+ (gdb) set logging file gdb-radiusd.log
+ (gdb) set logging on
+
+ and follow the instructions in section 4, below.
+
+3. DEBUGGING A LIVE SERVER
+
+ If you can't get a core dump, or the problem doesn't result in a
+ core dump, you may have to run the server under gdb. To do this,
+ ensure that you have symbols in the binaries (i.e. a non-stripped
+ binary) by re-building the server as described in the previous
+ section. Then, run the server under gdb as follows:
+
+ $ gdb radiusd
+
+ Enable logging in gdb via the following commands:
+
+ (gdb) set logging file gdb-radiusd.log
+ (gdb) set logging on
+
+ Tell gdb to pass any necessary command-line arguments to the
+ server:
+
+ (gdb) set args ...
+
+ Where the "..." are the command-line arguments you normally pass to
+ radiusd. If you don't normally pass command-line arguments, this
+ line is not necessary.
+
+ Then, do:
+
+ (gdb) run
+
+ When something interesting happens, you can hit CTRL-C in the
+ window, and you should be back at the gdb prompt:
- And then in 'gdb', do:
+ (gdb)
-$ bt
+ And follow the instructions in section 4, below.
- Copy the output, and mail it to the list, along with the name of the
-program you were running, and the name of the operating system.
-Without this information, it's impossible for anyone to know why the
-program core dumped.
+4. OBTAINING USEFUL INFORMATION
+ If the server was built with threads, you can do:
+
+ (gdb) info threads
+
+ Which will give you information about the threads. If the server
+ isn't threaded, that command-line will print a message saying so.
+
+ Then, do:
+
+ (gdb) thread apply all bt full
+
+ If the server isn't threaded, the "thread apply" section isn't necessary
+
+ The output should be printed to the screen, and also sent to the
+ gdb-radiusd.log file. Copy the log gile and mail it to the list, or
+ put it on a web page if it's too large. Include the name of the
+ operating system.
+ Without this information, it's impossible for anyone to know why the
+ program core dumped.
You can also submit the information to the bug database at:
- http://bugs.freeradius.org/
+ http://bugs.freeradius.org/
Submitting it to the bug database ensures that the bug report won't
-get forgotten, and that someone will eventually respond to it.
+ get forgotten, and that someone will eventually respond to it.
+
+
+5. VALGRIND
+
+ On Linux systems, "valgrind" is a useful tool that can catch certain
+ classes of bugs. To use it, run the server voa:
+
+$ valgrind --tool=memcheck --leak-check=full radiusd -Xm
+
+ It will print out certain kinds of errors to the screen. There may
+ be a number of errors related to OpenSSL, dlopen(), or libtldl. We
+ cannot do anything about those problems. However, any errors that are
+ inside of the FreeRADIUS source should be brought to our attention.
+
+
+6. Running with "screen"
+
+ If the bug is a crash of the server, and it takes a long time for the
+ crash to happen, perform the following steps:
+
+ * log in as root
+ * open a screen session (http://blogamundo.net/code/screen/)
+ $ screen bash
+ * make sure FreeRADIUS is not running
+ * make sure you have all the debug symbols about, or a debugable
+ version of the server installed
+ * configure screen to log to a file; 'Ctrl-A H'
+ * type 'gdb /path/to/radius' (or /path/to/freeradius on Debian)
+ * at the (gdb) prompt, type 'run -X'
+ * detach from screen 'Ctrl-A D'
+ * when you notice FreeRADIUS has died, reconnect to your screen session
+ $ screen -D -r
+ * at the (gdb) prompt type 'where' or for *lots* of info try
+ 'thread apply all bt full'
+ * tell screen to stop logging, 'Ctrl-A H'
+ * logout from screen
--
-FreeRADIUS Project, copyright 2004
+FreeRADIUS Project, copyright 2008
$Id$
projects / freeradius.git / blobdiff