Running Red Hat Linux 2.1AS, GNU gdb 6.1.
Need to debug a shared library that is loaded via dlopen.
According to the gdb help, 'shar REGEX' says:
"Load shared object library symbols for files matching REGEXP"

But, when I try it (using a shared library in the current directory),
I get the following error:
"No loaded shared libraries match the pattern `my lib name'"

'shar' with no REGEX lists the libraries that are already loaded.

From the help, I thought 'shar' would load the library in the arg. From the error,
it looks like it only lists what is loaded.

What I'm trying to do is to set a breakpoint at the entry point in a shared
library. Since the library is not yet loaded I can't breakpoint
the entry point. The only way that I have to do it currently is to break at
the dlopen and step in (which is causing me some trouble
with the symbols).

I am guessing that I am supposed to do something before the 'shar'
which I thought might be 'add-symbol-file' but that doesn't seem to
make a difference.

Anyone have any suggestions on this?
tks
MBL

I just answered my own question, here's what you do:

* gdb a.out
* break main
* run
(at breakpoint)
* set env LD_PRELOAD=./SHARED_LIBRARY_NAME
* break FUNCTION_NAME
(the following prompt should appear
Function "FUNCTION_NAME" not defined.
Make breakpoint pending on future shared library load? (y or [n])
(answer yes)
y
* cont

(program should continue and stop at the breakpoint)