linux-kernel - [PATCH] bloat-o-meter: Support comparing library archives

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Message-Id: <20200531080042.14902-1-nborisov@suse.com>
Date:   Sun, 31 May 2020 11:00:42 +0300
From:   Nikolay Borisov <nborisov@...e.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux@...musvillemoes.dk, Nikolay Borisov <nborisov@...e.com>
Subject: [PATCH] bloat-o-meter: Support comparing library archives

Library archives (.a) usually contain multiple object files so their
output of nm --size-sort contains lines like:

<ommitted for brevity>
00000000000003a8 t run_test

extent-map-tests.o:
<ommitted for brevity>

bloat-o-meter currently doesn't handle them which results in errors
when calling .split() on them. Fix this by simply ignoring them. This
enables diffing subsystems which generate built-in.a files.

Signed-off-by: Nikolay Borisov <nborisov@...e.com>
---
 scripts/bloat-o-meter | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scripts/bloat-o-meter b/scripts/bloat-o-meter
index 8c965f6a9881..d7ca46c612b3 100755
--- a/scripts/bloat-o-meter
+++ b/scripts/bloat-o-meter
@@ -26,6 +26,8 @@ re_NUMBER = re.compile(r'\.[0-9]+')
     sym = {}
     with os.popen("nm --size-sort " + file) as f:
         for line in f:
+            if line.startswith("\n") or ":" in line:
+                continue
             size, type, name = line.split()
             if type in format:
                 # strip generated symbols
-- 
2.17.1