From: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx> Subject: 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 Link: http://lkml.kernel.org/r/159282922499.248444.4883465570858385250.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 | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/scripts/decode_stacktrace.sh~scripts-decode_stacktrace-skip-missing-symbols +++ a/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 _
