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How to debug unknown dynamic code?by gaspodethewonderdog (Monk)
|on Dec 27, 2000 at 22:25 UTC||Need Help??|
gaspodethewonderdog has asked for the wisdom of the Perl Monks concerning the following question:
Alright... it started off as a simple little problem. Just use somebody else's code and not have to worry about how things get done. Apparently I was oh so very wrong. The problem I have is that the engineer who wrote the code seems to have learned some new tricks and decided to put them where they don't belong, and to top it off left for vacation... hurray! hehe
Anyways... there are two types of code that I need to be able to break on and haven't come up with a good way to break in them. One is an eval, which using my deductive reasoning is probably stepable through but I haven't tried yet.
The other code I'm having trouble with though is that the engineer has used modules (not the problem) but has used references to the other module functions elsewhere to essentially do switches in his code. I'm not familiar with the more powerful stuff with debugging so I don't know how to break on something like:
I would just set a breakpoint on a line number but this is in another module and the path to get there is a little bizarre. I tried setting a breakpoint on "Module::function" but that didn't stop it. Which leads me to believe that either breakpoints don't work that way, or with my luck I've isolated a chunk of code that I thought did something that actually never gets called.
... This is slowly become a nightmare and I guess I need to learn some tricks for using the debugger, because to top it off I can't check out this code to put in print statements or anything... and as the final blow to making anything even understandable this is a client/server program, with both in the same code base and the code that is run for the client or the server is indistiguishable from the other.
So any monks out there have any words of wisdom or advice (other than quit your job... hehe) I'd really appreciate it. Thanks!!!