The patch titled
Subject: scripts/decode_stacktrace.sh: guess path to modules
has been added to the -mm tree. Its filename is
scripts-decode_stacktrace-guess-path-to-modules.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/scripts-decode_stacktrace-guess-path-to-modules.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/scripts-decode_stacktrace-guess-path-to-modules.patch
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The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
Subject: scripts/decode_stacktrace.sh: guess path to modules
Try to find module in directory with vmlinux (for fresh build). Then try
standard paths where debuginfo are usually placed. Pick first file which
have elf section '.debug_line'.
Before:
$ echo 'tap_open+0x0/0x0 [tap]' |
./scripts/decode_stacktrace.sh /usr/lib/debug/boot/vmlinux-5.4.0-37-generic
WARNING! Modules path isn't set, but is needed to parse this symbol
tap_open+0x0/0x0 tap
After:
$ echo 'tap_open+0x0/0x0 [tap]' |
./scripts/decode_stacktrace.sh /usr/lib/debug/boot/vmlinux-5.4.0-37-generic
tap_open (drivers/net/tap.c:502) tap
Link: http://lkml.kernel.org/r/159282923068.248444.5461337458421616083.stgit@buzz
Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
Cc: Sasha Levin <sashal@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/decode_stacktrace.sh | 36 ++++++++++++++++++++++++++++++---
1 file changed, 33 insertions(+), 3 deletions(-)
--- a/scripts/decode_stacktrace.sh~scripts-decode_stacktrace-guess-path-to-modules
+++ a/scripts/decode_stacktrace.sh
@@ -12,9 +12,40 @@ fi
vmlinux=$1
basepath=${2-auto}
modpath=$3
+release=""
+
declare -A cache
declare -A modcache
+find_module() {
+ if [[ "$modpath" != "" ]] ; then
+ for fn in $(find "$modpath" -name "${module//_/[-_]}.ko*") ; do
+ if readelf -WS "$fn" | grep -qwF .debug_line ; then
+ echo $fn
+ return
+ fi
+ done
+ return 1
+ fi
+
+ modpath=$(dirname "$vmlinux")
+ find_module && return
+
+ if [[ $release == "" ]] ; then
+ release=$(gdb -ex 'print init_uts_ns.name.release' -ex 'quit' -quiet -batch "$vmlinux" | sed -n 's/\$1 = "\(.*\)".*/\1/p')
+ fi
+
+ for dn in {/usr/lib/debug,}/lib/modules/$release ; do
+ if [ -e "$dn" ] ; then
+ modpath="$dn"
+ find_module && return
+ fi
+ done
+
+ modpath=""
+ return 1
+}
+
parse_symbol() {
# The structure of symbol at this point is:
# ([name]+[offset]/[total length])
@@ -27,12 +58,11 @@ parse_symbol() {
elif [[ "${modcache[$module]+isset}" == "isset" ]]; then
local objfile=${modcache[$module]}
else
- if [[ $modpath == "" ]]; then
+ local objfile=$(find_module)
+ if [[ $objfile == "" ]] ; then
echo "WARNING! Modules path isn't set, but is needed to parse this symbol" >&2
return
fi
- local objfile=$(find "$modpath" -name "${module//_/[-_]}.ko*" -print -quit)
- [[ $objfile == "" ]] && return
modcache[$module]=$objfile
fi
_
Patches currently in -mm which might be from khlebnikov@xxxxxxxxxxxxxx are
scripts-decode_stacktrace-skip-missing-symbols.patch
scripts-decode_stacktrace-guess-basepath-if-not-specified.patch
scripts-decode_stacktrace-guess-path-to-modules.patch
scripts-decode_stacktrace-guess-path-to-vmlinux-by-release-name.patch
kernel-watchdog-flush-all-printk-nmi-buffers-when-hardlockup-detected.patch
