scripts/decode_stacktrace: strip basepath from all paths

Currently the basepath is removed only from the beginning of the string.
When the symbol is inlined and there's multiple line outputs of
addr2line, only the first line would have basepath removed.

Change to remove the basepath prefix from all lines.

Fixes: 31013836 ("scripts/decode_stacktrace: match basepath using shell prefix operator, not regex")
Co-developed-by: NShik Chen <shik@chromium.org>
Signed-off-by: NPi-Hsun Shih <pihsun@chromium.org>
Signed-off-by: NShik Chen <shik@chromium.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Reviewed-by: NStephen Boyd <swboyd@chromium.org>
Cc: Sasha Levin <sashal@kernel.org>
Cc: Nicolas Boichat <drinkcat@chromium.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Link: http://lkml.kernel.org/r/20200720082709.252805-1-pihsun@chromium.orgSigned-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

scripts/decode_stacktrace.sh

@@ -87,8 +87,8 @@ parse_symbol() {
 		return
 	fi
 
-	# Strip out the base of the path
-	code=${code#$basepath/}
+	# Strip out the base of the path on each line
+	code=$(while read -r line; do echo "${line#$basepath/}"; done <<< "$code")
 
 	# In the case of inlines, move everything to same line
 	code=${code//$'\n'/' '}