linux-kernel - [PATCH] scripts/gdb: fix 'lx-current' for x86

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Message-Id: <20230204090139.1789264-1-xiehuan09@gmail.com>
Date:   Sat,  4 Feb 2023 17:01:39 +0800
From:   Jeff Xie <xiehuan09@...il.com>
To:     jan.kiszka@...mens.com, kbingham@...nel.org
Cc:     linux-kernel@...r.kernel.org, Jeff Xie <xiehuan09@...il.com>
Subject: [PATCH] scripts/gdb: fix 'lx-current' for x86

When printing the name of the current process, it will report an error:
(gdb) p $lx_current().comm
Python Exception <class 'gdb.error'> No symbol "current_task" in current context.: 
Error occurred in Python: No symbol "current_task" in current context.

Because the commit <e57ef2ed97c1> ("x86: Put hot per CPU variables into a struct") 
changed it.

Signed-off-by: Jeff Xie <xiehuan09@...il.com>
---
 scripts/gdb/linux/cpus.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/gdb/linux/cpus.py b/scripts/gdb/linux/cpus.py
index 15fc4626d236..9ee99f9fae8d 100644
--- a/scripts/gdb/linux/cpus.py
+++ b/scripts/gdb/linux/cpus.py
@@ -163,7 +163,7 @@ def get_current_task(cpu):
     task_ptr_type = task_type.get_type().pointer()
 
     if utils.is_target_arch("x86"):
-         var_ptr = gdb.parse_and_eval("&current_task")
+         var_ptr = gdb.parse_and_eval("&pcpu_hot.current_task")
          return per_cpu(var_ptr, cpu).dereference()
     elif utils.is_target_arch("aarch64"):
          current_task_addr = gdb.parse_and_eval("$SP_EL0")
-- 
2.25.1