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Groups > linux.kernel > #1367143

[PATCHv4 12/12] scripts/gdb: Add lx_thread_info_by_pid helper

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The tasks module already provides helpers to find the task struct by
pid, and the thread_info by task struct; however this is cumbersome to
utilise on the gdb commandline.

Wrap these two functionalities together in an extra single helper to
allow exploring the thread info, from a PID value

Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
---
 scripts/gdb/linux/tasks.py | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py
index 862a4ae24d49..1bf949c43b76 100644
--- a/scripts/gdb/linux/tasks.py
+++ b/scripts/gdb/linux/tasks.py
@@ -114,3 +114,22 @@ variable."""
 
 
 LxThreadInfoFunc()
+
+
+class LxThreadInfoByPidFunc (gdb.Function):
+    """Calculate Linux thread_info from task variable found by pid
+
+$lx_thread_info_by_pid(PID): Given PID, return the corresponding thread_info
+variable."""
+
+    def __init__(self):
+        super(LxThreadInfoByPidFunc, self).__init__("lx_thread_info_by_pid")
+
+    def invoke(self, pid):
+        task = get_task_by_pid(pid)
+        if task:
+            return get_thread_info(task.dereference())
+        else:
+            raise gdb.GdbError("No task of PID " + str(pid))
+
+LxThreadInfoByPidFunc()
-- 
2.5.0

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[PATCHv4 00/12] gdb/scripts: Linux awareness debug commands Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 10/12] scripts/gdb: Add a Radix Tree Parser Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 12/12] scripts/gdb: Add lx_thread_info_by_pid helper Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 05/12] scripts/gdb: Support !CONFIG_MODULES gracefully Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 09/12] scripts/gdb: Add cpu iterators Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 01/12] scripts/gdb: Provide linux constants Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
    Re: [PATCHv4 01/12] scripts/gdb: Provide linux constants Jan Kiszka <jan.kiszka@siemens.com> - 2016-03-30 23:10 +0200
  [PATCHv4 06/12] scripts/gdb: Provide a dentry_name VFS path helper Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 02/12] scripts/gdb: Provide kernel list item generators Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 07/12] scripts/gdb: Add io resource readers Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 08/12] scripts/gdb: Add mount point list command Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 11/12] scripts/gdb: Add documentation example for radix tree Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 04/12] scripts/gdb: Provide exception catching parser Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200
  [PATCHv4 03/12] scripts/gdb: Convert modules usage to lists functions Kieran Bingham <kieran.bingham@linaro.org> - 2016-03-30 14:10 +0200

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