CODEWITHSUNDEEP
gdb
ceremcem
ceremcem

Reputation: 4350

Is there a "watch window" like GDB function?

In gdb, when it hits a breakpoint, I need to manually investigate the variable values, one by one, with print or print/x functions.

Is there any easier way to list all selected variable's values whenever it hits a breakpoint, commonly known as a "watch window" of a GUI debugger?

Upvotes: 0

Views: 750

Answers (1)

Velkan
Velkan

Reputation: 7582

Commands can be executed on breakpoints.

From docs:

break foo
commands
printf "x is %d\n",x
end

Or add commands to some existing breakpoint (breakpoint number 3 in this case):

commands 3
print x
print y
end

Or make a command that adds prints to a breakpoint:

define addwatch
commands $arg0
print x
print y
end
end

Then use:

addwatch 3

Or make a command that sets a breakpoint and adds prints to it.

Scripts can be stored in .gdbinit, so they'll load automatically. The language is either this GDB syntax or Python.

P.S. Some people do tracing with this by adding continue at the end of the command list: that way the variables are printed, but the application doesn't stop on the breakpoint.

Upvotes: 2

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