linux-kernel - [PATCH] scripts/gdb: fix 'lx-lsmod' show the wrong size

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Date:   Tue, 20 Jun 2023 17:48:33 +0800
From:   Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>
To:     Jan Kiszka <jan.kiszka@...mens.com>,
        Kieran Bingham <kbingham@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Pankaj Raghav <p.raghav@...sung.com>
CC:     <chinwen.chang@...iatek.com>, <qun-wei.lin@...iatek.com>,
        <linux-mm@...ck.org>, <andrew.yang@...iatek.com>,
        Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: [PATCH] scripts/gdb: fix 'lx-lsmod' show the wrong size

'lsmod' shows total core layout size, so we need to
sum up all the sections in core layout in gdb scripts.

/ # lsmod
kasan_test 200704 0 - Live 0xffff80007f640000

Before patch:
(gdb) lx-lsmod
Address            Module                  Size  Used by
0xffff80007f640000 kasan_test             36864  0

After patch:
(gdb) lx-lsmod
Address            Module                  Size  Used by
0xffff80007f640000 kasan_test            200704  0

Fixes: b4aff7513df3 ("scripts/gdb: use mem instead of core_layout to get the module address")
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>
---
 scripts/gdb/linux/constants.py.in |  3 +++
 scripts/gdb/linux/modules.py      | 12 +++++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in
index 50a92c4e9984..fab74ca9df6f 100644
--- a/scripts/gdb/linux/constants.py.in
+++ b/scripts/gdb/linux/constants.py.in
@@ -64,6 +64,9 @@ LX_GDBPARSED(IRQ_HIDDEN)
 
 /* linux/module.h */
 LX_GDBPARSED(MOD_TEXT)
+LX_GDBPARSED(MOD_DATA)
+LX_GDBPARSED(MOD_RODATA)
+LX_GDBPARSED(MOD_RO_AFTER_INIT)
 
 /* linux/mount.h */
 LX_VALUE(MNT_NOSUID)
diff --git a/scripts/gdb/linux/modules.py b/scripts/gdb/linux/modules.py
index 261f28640f4c..84933c4c1083 100644
--- a/scripts/gdb/linux/modules.py
+++ b/scripts/gdb/linux/modules.py
@@ -73,11 +73,17 @@ class LxLsmod(gdb.Command):
                 "        " if utils.get_long_type().sizeof == 8 else ""))
 
         for module in module_list():
-            layout = module['mem'][constants.LX_MOD_TEXT]
+            total_size = 0
+            for i in range(constants.LX_MOD_TEXT, constants.LX_MOD_RO_AFTER_INIT + 1):
+                layout = module['mem'][i]
+                if i == constants.LX_MOD_TEXT:
+                    text_addr = str(layout['base']).split()[0]
+                total_size += layout['size']
+
             gdb.write("{address} {name:<19} {size:>8}  {ref}".format(
-                address=str(layout['base']).split()[0],
+                address=text_addr,
                 name=module['name'].string(),
-                size=str(layout['size']),
+                size=str(total_size),
                 ref=str(module['refcnt']['counter'] - 1)))
 
             t = self._module_use_type.get_type().pointer()
-- 
2.18.0