linux-kernel - [PATCH 2/3] scripts/gdb: fix lx-timerlist for Python3

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Date:   Tue, 21 Mar 2023 14:19:29 +0800
From:   Peng Liu <pngliu@...mail.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     jan.kiszka@...mens.com, kbingham@...nel.org,
        akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        liupeng17@...ovo.com
Subject: [PATCH 2/3] scripts/gdb: fix lx-timerlist for Python3

From: Peng Liu <liupeng17@...ovo.com>

Below incompatibilities between Python2 and Python3 made lx-timerlist
fail to run under Python3.

o xrange() is replaced by range() in Python3
o bytes and str are different types in Python3
o the return value of Inferior.read_memory() is memoryview object in
  Python3

Signed-off-by: Peng Liu <liupeng17@...ovo.com>
Reviewed-by: Jan Kiszka <jan.kiszka@...mens.com>
---
 scripts/gdb/linux/timerlist.py | 4 +++-
 scripts/gdb/linux/utils.py     | 5 ++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/scripts/gdb/linux/timerlist.py b/scripts/gdb/linux/timerlist.py
index 44e39dc3eb64..8281da068c5b 100644
--- a/scripts/gdb/linux/timerlist.py
+++ b/scripts/gdb/linux/timerlist.py
@@ -72,7 +72,7 @@ def print_cpu(hrtimer_bases, cpu, max_clock_bases):
     ts = cpus.per_cpu(tick_sched_ptr, cpu)
 
     text = "cpu: {}\n".format(cpu)
-    for i in xrange(max_clock_bases):
+    for i in range(max_clock_bases):
         text += " clock {}:\n".format(i)
         text += print_base(cpu_base['clock_base'][i])
 
@@ -157,6 +157,8 @@ def pr_cpumask(mask):
     num_bytes = (nr_cpu_ids + 7) / 8
     buf = utils.read_memoryview(inf, bits, num_bytes).tobytes()
     buf = binascii.b2a_hex(buf)
+    if type(buf) is not str:
+        buf=buf.decode()
 
     chunks = []
     i = num_bytes
diff --git a/scripts/gdb/linux/utils.py b/scripts/gdb/linux/utils.py
index 1553f68716cc..7f36aee32ac6 100644
--- a/scripts/gdb/linux/utils.py
+++ b/scripts/gdb/linux/utils.py
@@ -88,7 +88,10 @@ def get_target_endianness():
 
 
 def read_memoryview(inf, start, length):
-    return memoryview(inf.read_memory(start, length))
+    m = inf.read_memory(start, length)
+    if type(m) is memoryview:
+        return m
+    return memoryview(m)
 
 
 def read_u16(buffer, offset):
-- 
2.34.1