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 Forums >>  Debuggers  >>  Stress Testing PyDbg and hook_container

Topic created on: October 5, 2006 11:03 CDT by tagetora .

Hi all,

I'm playing a bit with pydbg and the hook_container class. I noticed that setting about 8/9 hooks (maybe too much?) some hooks are loosed.

I will try to explain it better. Well, let's say our target has some encryption-related functions and socket functions. Ok, the target starts encrypting, sending, receiving, decrypting, etc. cpu load reaches 100% and then we loose a hook (usually only one and it's either sendto or recvfrom). The hooked function is being called (I'm seeing traffic in ethereal^H^H^H^H wireshark) but its handler isn't called (sendto_hook or recvfrom_hook in this example).

Someone had similar problems? Any ideas to "optimize" the hooks? BTW, I'm using the latest pydbg release.

Thanks ;)

  ryanlrussell     October 5, 2006 12:00.24 CDT
I don't think it's broken in general.  When using process stalker, I typically have hundreds or thousands of hooks.  I usually only run into trouble when I hook the msg loop, and tell PS to restore breakpoints.

  pedram     October 5, 2006 13:59.48 CDT
Process Stalker does't use the hooking library. I'll have to look into this. If you can e-mail me your script, please do.

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