From f643b9ee97766e1846fab237c58a56277bf7e530 Mon Sep 17 00:00:00 2001
From: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Date: Thu, 6 Aug 2020 23:17:35 -0700
Subject: [PATCH] scripts/decode_stacktrace.sh: skip missing symbols
For now script turns missing symbols into '0' and make bogus decode. Skip
them instead. Also simplify parsing output of 'nm'.
Before:
$ echo 'xxx+0x0/0x0' | ./scripts/decode_stacktrace.sh vmlinux ""
xxx (home/khlebnikov/src/linux/./arch/x86/include/asm/processor.h:398)
After:
$ echo 'xxx+0x0/0x0' | ./scripts/decode_stacktrace.sh vmlinux ""
xxx+0x0/0x0
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/159282922499.248444.4883465570858385250.stgit@buzz
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
scripts/decode_stacktrace.sh | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index 0869def435ee7..b157037af6dfb 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -56,7 +56,11 @@ parse_symbol() {
if [[ "${cache[$module,$name]+isset}" == "isset" ]]; then
local base_addr=${cache[$module,$name]}
else
- local base_addr=$(nm "$objfile" | grep -i ' t ' | awk "/ $name\$/ {print \$1}" | head -n1)
+ local base_addr=$(nm "$objfile" | awk '$3 == "'$name'" && ($2 == "t" || $2 == "T") {print $1; exit}')
+ if [[ $base_addr == "" ]] ; then
+ # address not found
+ return
+ fi
cache[$module,$name]="$base_addr"
fi
# Let's start doing the math to get the exact address into the
--
2.30.2