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scripts/decode_stacktrace.sh: guess basepath if not specified

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Guess path to kernel sources using known location of symbol "kernel_init".
Make basepath argument optional.

Before:

$ echo 'vfs_open+0x0/0x0' | ./scripts/decode_stacktrace.sh vmlinux ""
vfs_open (home/khlebnikov/src/linux/fs/open.c:912)

After:

$ echo 'vfs_open+0x0/0x0' | ./scripts/decode_stacktrace.sh vmlinux
vfs_open (fs/open.c:912)

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Sasha Levin <sashal@kernel.org>
Link: http://lkml.kernel.org/r/159282922803.248444.2379229451667913634.stgit@buzz
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Konstantin Khlebnikov 2020-08-06 23:17:38 -07:00 committed by Linus Torvalds
parent f643b9ee97
commit ecda6e27fa
1 changed files with 11 additions and 3 deletions
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14
scripts/decode_stacktrace.sh
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@ -3,14 +3,14 @@
# (c) 2014, Sasha Levin <sasha.levin@oracle.com> # (c) 2014, Sasha Levin <sasha.levin@oracle.com>
#set -x #set -x
if [[ $# < 2 ]]; then if [[ $# < 1 ]]; then
echo "Usage:" echo "Usage:"
echo " $0 [vmlinux] [base path] [modules path]" echo " $0 <vmlinux> [base path] [modules path]"
exit 1 exit 1
fi fi
vmlinux=$1 vmlinux=$1
basepath=$2 basepath=${2-auto}
modpath=$3 modpath=$3
declare -A cache declare -A cache
declare -A modcache declare -A modcache
@ -152,6 +152,14 @@ handle_line() {
echo "${words[@]}" "$symbol $module" echo "${words[@]}" "$symbol $module"
} }
if [[ $basepath == "auto" ]] ; then
module=""
symbol="kernel_init+0x0/0x0"
parse_symbol
basepath=${symbol#kernel_init (}
basepath=${basepath%/init/main.c:*)}
fi
while read line; do while read line; do
# Let's see if we have an address in the line # Let's see if we have an address in the line
if [[ $line =~ \[\<([^]]+)\>\] ]] || if [[ $line =~ \[\<([^]]+)\>\] ]] ||