CODEWITHSUNDEEP
regexdebugginggdb
Lior Avramov
Lior Avramov

Reputation: 695

Regular expression breakpoint in GDB

I am trying to set breakpoints on all functions that start with "dc_api" but I must exclude functions that start with "dc_api_port_counter" and "dc_api_send_reply".

Regarding the "dc_api_port_counter" exclusion, note that I do want to include functions that start with "dc_api_port_something".

I used regex online tester and came up with the following regex: dc_api_(?!port_counter|send_reply).*

However, when using it, I get the following error:

>(gdb) rbreak dc_api_(?!port_counter|send_reply).*
>!port_counter|send_reply).*: event not found
>(gdb)

Upvotes: 1

Views: 5204

Answers (2)

Brian Birmingham
Brian Birmingham

Reputation: 11

GDB has convenience functions, https://sourceware.org/gdb/onlinedocs/gdb/Convenience-Funs.html, and the $_regex(str, regex) function will correctly handle regex expressions. However, this might be intended for use as the conditional in conditional breaks.

Upvotes: 1

Tom Tromey
Tom Tromey

Reputation: 22549

There's no simple, built-in way to do this. However, it can be done a couple of ways.

First, use rbreak to set "too many" breakpoints. Then, the trick is to find an automated way to delete the extra breakpoints.

A straightforward way to do this is to write a bit of code in Python that loops over all the gdb breakpoints. For each breakpoint it would examine the location attribute, and, if it should be excluded, call the breakpoint's delete method.

Upvotes: 2

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