--- Begin Message ---
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Subject: |
[PATCH] system: Modify GDB skeleton to find debug files for any profile. |
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Date: |
Sun, 16 Aug 2020 01:39:47 -0400 |
Instead of hard coding the debug directory to that of the user profile, use
Guile scripting to derive the debug file directories from the LIBRARY_PATH
environment variable.
* gnu/system/shadow.scm (default-skeletons)[gdbinit]: Derive the value of
DEBUG-FILE-DIRECTORY via the environment variable LIBRARY_PATH, so that debug
files from any profile can be found.
* doc/guix.texi (Installing Debugging Files): Document it.
---
doc/guix.texi | 17 +++++++++++++++++
gnu/system/shadow.scm | 11 ++++++++++-
2 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/doc/guix.texi b/doc/guix.texi
index 587c004bee..53b85418fb 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -30145,6 +30145,23 @@ GDB}):
From there on, GDB will pick up debugging information from the
@file{.debug} files under @file{~/.guix-profile/lib/debug}.
+Below is an alternative GDB script that can be useful when working with
+other profiles. It takes advantage of the Guile integration available
+in GDB.
+
+@example
+guile
+(begin
+ (use-modules (gdb)
+ (srfi srfi-26))
+ (let* ((library-paths (string-split (getenv "LIBRARY_PATH") #\:))
+ (debug-paths (map (cut string-append <> "/debug")
+ library-paths)))
+ (execute (format #f "set debug-file-directory ~a"
+ (string-join debug-paths ":")))))
+end
+@example
+
In addition, you will most likely want GDB to be able to show the source
code being debugged. To do that, you will have to unpack the source
code of the package of interest (obtained with @code{guix build
diff --git a/gnu/system/shadow.scm b/gnu/system/shadow.scm
index a69339bc07..d31cd37077 100644
--- a/gnu/system/shadow.scm
+++ b/gnu/system/shadow.scm
@@ -162,7 +162,16 @@ XTerm*utf8: always
XTerm*metaSendsEscape: true\n"))
(gdbinit (plain-file "gdbinit" "\
# Tell GDB where to look for separate debugging files.
-set debug-file-directory ~/.guix-profile/lib/debug
+guile
+(begin
+ (use-modules (gdb)
+ (srfi srfi-26))
+ (let* ((library-paths (string-split (getenv \"LIBRARY_PATH\") #\\:))
+ (debug-paths (map (cut string-append <> \"/debug\")
+ library-paths)))
+ (execute (format #f \"set debug-file-directory ~a\"
+ (string-join debug-paths \":\")))))
+end
# Authorize extensions found in the store, such as the
# pretty-printers of libstdc++.
--
2.27.0
--- End Message ---
--- Begin Message ---
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Subject: |
Re: [bug#42882] |
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Date: |
Mon, 24 Aug 2020 09:58:44 -0400 |
|
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) |
Mathieu Othacehe <othacehe@gnu.org> writes:
> Hey Maxim,
>
>> Thanks for the review! I've taken into account your suggestions and improved
>> the mechanism a bit, so that we can now simply use the
>> GDB_DEBUG_FILE_DIRECTORY environment variable (which is set up by a new
>> search
>> path specification defined on the gdb package). I think this is better as
>> otherwise you'd need to ensure the gcc-toolchain is installed in the profile
>> you want GDB to find the debug files (because GCC is responsible for setting
>> the LIBRARY_PATH environment variable).
>>
>> I hope it makes sense :-).
>
> I think it makes! Your last revision seems fine to me.
>
> Thanks,
>
> Mathieu
Thanks for taking a look! I've now pushed this change into the
core-updates branch as commit 720a4adc91.
Thank you,
Maxim
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