scripts/gdb: Raise error with reduced debugging information
Commit Message
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.
Fixes: e3c8d33e0d62 ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
Hi all,
I added the Fixes tag because it really was not a problem before,
however it now is an issue and the commit in the Fixes: tag has been
backported to stable already
scripts/gdb/linux/constants.py.in | 2 ++
scripts/gdb/vmlinux-gdb.py | 5 ++++-
2 files changed, 6 insertions(+), 1 deletion(-)
@@ -41,6 +41,8 @@
import gdb
+LX_CONFIG(CONFIG_DEBUG_INFO_REDUCED)
+
/* linux/clk-provider.h */
if IS_BUILTIN(CONFIG_COMMON_CLK):
LX_GDBPARSED(CLK_GET_RATE_NOCACHE)
@@ -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