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scripts/gdb: raise error with reduced debugging information 

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 e3c8d33e0d ("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@gmail.com
Fixes: e3c8d33e0d ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Antonio Borneo <antonio.borneo@foss.st.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Florian Fainelli 2023-04-06 14:52:51 -07:00 committed by Andrew Morton
parent b7235d6bb5
commit 8af055ae25
2 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
scripts/gdb/linux/constants.py.in
View File

@ -40,6 +40,8 @@
import gdb import gdb
LX_CONFIG(CONFIG_DEBUG_INFO_REDUCED)
/* linux/clk-provider.h */ /* linux/clk-provider.h */
if IS_BUILTIN(CONFIG_COMMON_CLK): if IS_BUILTIN(CONFIG_COMMON_CLK):
LX_GDBPARSED(CLK_GET_RATE_NOCACHE) LX_GDBPARSED(CLK_GET_RATE_NOCACHE)

5
scripts/gdb/vmlinux-gdb.py
View File

@ -22,6 +22,10 @@ except:
gdb.write("NOTE: gdb 7.2 or later required for Linux helper scripts to " gdb.write("NOTE: gdb 7.2 or later required for Linux helper scripts to "
"work.\n") "work.\n")
else: 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.utils
import linux.symbols import linux.symbols
import linux.modules import linux.modules
@ -32,7 +36,6 @@ else:
import linux.lists import linux.lists
import linux.rbtree import linux.rbtree
import linux.proc import linux.proc
import linux.constants
import linux.timerlist import linux.timerlist
import linux.clk import linux.clk
import linux.genpd import linux.genpd