June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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Just-in-time debugging
Sometimes a program will start to misbehave after it has been running for a while, and you would like to know what it is doing. The GDB attach feature does exactly this. I call it just-in-time debugging. It is available with both native and remote debug sessions.
In the case of remote debugging, you need to find the PID of the process to be debugged and pass it to gdbserver with the --attach option. For example, if the PID is 109, you would type this:
# gdbserver --attach :10000 109Attached; pid = 109Listening on port 10000
This forces the process to stop as if it were at a breakpoint, allowing you to start your cross GDB in the normal way and connect to gdbserver. When you are done, you can detach, allowing the program ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.