[PATCH 2/3] perf scripts python: exported-sql-viewer.py: Fix Array TypeError

From: Adrian Hunter
Date: Fri May 21 2021 - 05:21:49 EST


The 'Array' class is present in more than one python standard library.
In some versions of Python 3, the following error occurs:

Traceback (most recent call last):
File "tools/perf/scripts/python/exported-sql-viewer.py", line 4702, in <lambda>
reports_menu.addAction(CreateAction(label, "Create a new window displaying branch events", lambda a=None,x=dbid: self.NewBranchView(x), self))
File "tools/perf/scripts/python/exported-sql-viewer.py", line 4727, in NewBranchView
BranchWindow(self.glb, event_id, ReportVars(), self)
File "tools/perf/scripts/python/exported-sql-viewer.py", line 3208, in __init__
self.model = LookupCreateModel(model_name, lambda: BranchModel(glb, event_id, report_vars.where_clause))
File "tools/perf/scripts/python/exported-sql-viewer.py", line 343, in LookupCreateModel
model = create_fn()
File "tools/perf/scripts/python/exported-sql-viewer.py", line 3208, in <lambda>
self.model = LookupCreateModel(model_name, lambda: BranchModel(glb, event_id, report_vars.where_clause))
File "tools/perf/scripts/python/exported-sql-viewer.py", line 3124, in __init__
self.fetcher = SQLFetcher(glb, sql, prep, self.AddSample)
File "tools/perf/scripts/python/exported-sql-viewer.py", line 2658, in __init__
self.buffer = Array(c_char, self.buffer_size, lock=False)
TypeError: abstract class

This apparently happens because Python can be inconsistent about which
class of the name 'Array' gets imported. Fix by importing explicitly by
name so that only the desired 'Array' gets imported.

Fixes: 8392b74b575c3 ("perf scripts python: exported-sql-viewer.py: Add ability to display all the database tables")
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
tools/perf/scripts/python/exported-sql-viewer.py | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/perf/scripts/python/exported-sql-viewer.py b/tools/perf/scripts/python/exported-sql-viewer.py
index b5078d65704e..4a63843f623c 100755
--- a/tools/perf/scripts/python/exported-sql-viewer.py
+++ b/tools/perf/scripts/python/exported-sql-viewer.py
@@ -125,8 +125,9 @@ if pyside_version_1:
from PySide.QtGui import *
from PySide.QtSql import *

-from decimal import *
-from ctypes import *
+from decimal import Decimal, ROUND_HALF_UP
+from ctypes import CDLL, Structure, create_string_buffer, addressof, sizeof, \
+ c_void_p, c_bool, c_byte, c_char, c_int, c_uint, c_longlong, c_ulonglong
from multiprocessing import Process, Array, Value, Event

# xrange is range in Python3
--
2.17.1