The patch titled
Subject: scripts/gdb: raise error with reduced debugging information
has been added to the -mm mm-nonmm-unstable branch. Its filename is
scripts-gdb-raise-error-with-reduced-debugging-information.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/scripts-gdb-raise-error-with-reduced-debugging-information.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Florian Fainelli <f.fainelli@xxxxxxxxx>
Subject: scripts/gdb: raise error with reduced debugging information
Date: Thu, 6 Apr 2023 14:52:51 -0700
If CONFIG_DEBUG_INFO_REDUCED is enabled in the kernel configuration, we
will typically not be able to load vmlinux-gdb.py and will fail with:
Traceback (most recent call last):
File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/vmlinux-gdb.py", line 25, in <module>
import linux.utils
File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/scripts/gdb/linux/utils.py", line 131, in <module>
atomic_long_counter_offset = atomic_long_type.get_type()['counter'].bitpos
KeyError: 'counter'
Rather be left wondering what is happening only to find out that reduced
debug information is the cause, raise an eror. This was not typically a
problem until e3c8d33e0d62 ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch")
but it has since then.
Link: https://lkml.kernel.org/r/20230406215252.1580538-1-f.fainelli@xxxxxxxxx
Fixes: e3c8d33e0d62 ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch")
Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Cc: Antonio Borneo <antonio.borneo@xxxxxxxxxxx>
Cc: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Cc: John Ogness <john.ogness@xxxxxxxxxxxxx>
Cc: Kieran Bingham <kbingham@xxxxxxxxxx>
Cc: Petr Mladek <pmladek@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/gdb/linux/constants.py.in | 2 ++
scripts/gdb/vmlinux-gdb.py | 5 ++++-
2 files changed, 6 insertions(+), 1 deletion(-)
--- a/scripts/gdb/linux/constants.py.in~scripts-gdb-raise-error-with-reduced-debugging-information
+++ a/scripts/gdb/linux/constants.py.in
@@ -40,6 +40,8 @@
import gdb
+LX_CONFIG(CONFIG_DEBUG_INFO_REDUCED)
+
/* linux/clk-provider.h */
if IS_BUILTIN(CONFIG_COMMON_CLK):
LX_GDBPARSED(CLK_GET_RATE_NOCACHE)
--- a/scripts/gdb/vmlinux-gdb.py~scripts-gdb-raise-error-with-reduced-debugging-information
+++ a/scripts/gdb/vmlinux-gdb.py
@@ -22,6 +22,10 @@ except:
gdb.write("NOTE: gdb 7.2 or later required for Linux helper scripts to "
"work.\n")
else:
+ import linux.constants
+ if linux.constants.LX_CONFIG_DEBUG_INFO_REDUCED:
+ raise gdb.GdbError("Reduced debug information will prevent GDB "
+ "from having complete types.\n")
import linux.utils
import linux.symbols
import linux.modules
@@ -32,7 +36,6 @@ else:
import linux.lists
import linux.rbtree
import linux.proc
- import linux.constants
import linux.timerlist
import linux.clk
import linux.genpd
_
Patches currently in -mm which might be from f.fainelli@xxxxxxxxx are
scripts-gdb-add-a-radix-tree-parser-v2.patch
scripts-gdb-raise-error-with-reduced-debugging-information.patch
