| Debugging with GDB: List |
|---|
Next: Specify Location, Up: Source [Contents][Index]
To print lines from a source file, use the list command
(abbreviated l). By default, ten lines are printed.
There are several ways to specify what part of the file you want to
print; see Specify Location, for the full list.
Here are the forms of the list command most commonly used:
list linenum
Print lines centered around line number linenum in the current source file.
list function
Print lines centered around the beginning of function function.
list
Print more lines. If the last lines printed were printed with a
list command, this prints lines following the last lines
printed; however, if the last line printed was a solitary line printed
as part of displaying a stack frame (see Examining the
Stack), this prints lines centered around that line.
list -
Print lines just before the lines last printed.
By default, GDB prints ten source lines with any of these forms of
the list command. You can change this using set listsize:
set listsize count
set listsize unlimited
Make the list command display count source lines (unless
the list argument explicitly specifies some other number).
Setting count to unlimited or 0 means there’s no limit.
show listsize
Display the number of lines that list prints.
Repeating a list command with RET discards the argument,
so it is equivalent to typing just list. This is more useful
than listing the same lines again. An exception is made for an
argument of ‘-’; that argument is preserved in repetition so that
each repetition moves up in the source file.
In general, the list command expects you to supply zero, one or two
locations. Locations specify source lines; there are several ways
of writing them (see Specify Location), but the effect is always
to specify some source line.
Here is a complete description of the possible arguments for list:
list location
Print lines centered around the line specified by location.
list first,last
Print lines from first to last. Both arguments are
locations. When a list command has two locations, and the
source file of the second location is omitted, this refers to
the same source file as the first location.
list ,last
Print lines ending with last.
list first,
Print lines starting with first.
list +
Print lines just after the lines last printed.
list -
Print lines just before the lines last printed.
list
As described in the preceding table.
Next: Specify Location, Up: Source [Contents][Index]