linux-kernel - [PATCH 6/6] scripts/gdb: rename pool_index to pool_index_plus

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Date: Wed, 19 Jun 2024 15:49:11 +0800
From: Kuan-Ying Lee <kuan-ying.lee@...onical.com>
To: kuan-ying.lee@...onical.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Kieran Bingham <kbingham@...nel.org>,
	Vlastimil Babka <vbabka@...e.cz>,
	Marco Elver <elver@...gle.com>,
	Peter Collingbourne <pcc@...gle.com>,
	Oscar Salvador <osalvador@...e.de>
Cc: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 6/6] scripts/gdb: rename pool_index to pool_index_plus_1

We encounter the following issue after commit a6c1d9cb9a68 ("stackdepot:
rename pool_index to pool_index_plus_1").

(gdb) lx-dump-page-owner --pfn 262144
...
Python Exception <class 'gdb.error'>: There is no member named pool_index.
Error occurred in Python: There is no member named pool_index.

We rename pool_index to pool_index_plus_1 to fix this issue.

Fixes: a6c1d9cb9a68 ("stackdepot: rename pool_index to pool_index_plus_1")
Signed-off-by: Kuan-Ying Lee <kuan-ying.lee@...onical.com>
---
 scripts/gdb/linux/stackdepot.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/scripts/gdb/linux/stackdepot.py b/scripts/gdb/linux/stackdepot.py
index 0281d9de4b7c..bb3a0f843931 100644
--- a/scripts/gdb/linux/stackdepot.py
+++ b/scripts/gdb/linux/stackdepot.py
@@ -27,14 +27,18 @@ def stack_depot_fetch(handle):
     offset = parts['offset'] << DEPOT_STACK_ALIGN
     pools_num = gdb.parse_and_eval('pools_num')
 
-    if parts['pool_index'] > pools_num:
+    if handle == 0:
+        raise gdb.GdbError("handle is 0\n")
+
+    pool_index = parts['pool_index_plus_1'] - 1
+    if pool_index >= pools_num:
         gdb.write("pool index %d out of bounds (%d) for stack id 0x%08x\n" % (parts['pool_index'], pools_num, handle))
         return gdb.Value(0), 0
 
     stack_pools = gdb.parse_and_eval('stack_pools')
 
     try:
-        pool = stack_pools[parts['pool_index']]
+        pool = stack_pools[pool_index]
         stack = (pool + gdb.Value(offset).cast(utils.get_size_t_type())).cast(stack_record_type.get_type().pointer())
         size = int(stack['size'].cast(utils.get_ulong_type()))
         return stack['entries'], size
-- 
2.34.1