Guile Commands (Debugging with GDB)
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23.4.2 Guile Commands
GDB provides two commands for accessing the Guile interpreter:
guile-repl
gr
The guile-repl
command can be used to start an interactive Guile prompt or repl. To return to GDB, type ,q or the EOF
character (e.g., Ctrl-D on an empty prompt). These commands do not take any arguments.
guile [scheme-expression]
gu [scheme-expression]
The guile
command can be used to evaluate a Scheme expression.
If given an argument, GDB will pass the argument to the Guile interpreter for evaluation.
(gdb) guile (display (+ 20 3)) (newline) 23
The result of the Scheme expression is displayed using normal Guile rules.
(gdb) guile (+ 20 3) 23
If you do not provide an argument to guile
, it will act as a multi-line command, like define
. In this case, the Guile script is made up of subsequent command lines, given after the guile
command. This command list is terminated using a line containing end
. For example:
(gdb) guile >(display 23) >(newline) >end 23
It is also possible to execute a Guile script from the GDB interpreter:
source script-name
- The script name must end with ‘
.scm
’ and GDB must be configured to recognize the script language based on filename extension using thescript-extension
setting. See Extending GDB. guile (load "script-name")
- This method uses the
load
Guile function. It takes a string argument that is the name of the script to load. See the Guile documentation for a description of this function. (see Loading in GNU Guile Reference Manual).
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