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bpo-32121: Add most_recent_first parameter to tracemalloc.Traceback.format (#4534)

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* Add most_recent_first parameter to tracemalloc.Traceback.format to allow
   reversing the order of the frames in the output
* Reversed default sorting of tracemalloc.Traceback frames
* Allowed negative limit, truncating from the other side.
This commit is contained in:
Jesse-Bakker 2017-11-30 00:05:07 +01:00 • committed by Victor Stinner
parent 859f7ce7a4
commit 706e10b186
7 changed files with 70 additions and 26 deletions
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34
Lib/test/test_tracemalloc.py
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@ -171,6 +171,9 @@ class TestTracemallocEnabled(unittest.TestCase):
traces = tracemalloc._get_traces()
obj1_traceback._frames = tuple(reversed(obj1_traceback._frames))
obj2_traceback._frames = tuple(reversed(obj2_traceback._frames))
trace1 = self.find_trace(traces, obj1_traceback)
trace2 = self.find_trace(traces, obj2_traceback)
domain1, size1, traceback1 = trace1
@ -537,11 +540,11 @@ class TestSnapshot(unittest.TestCase):
def test_trace_format(self):
snapshot, snapshot2 = create_snapshots()
trace = snapshot.traces[0]
self.assertEqual(str(trace), 'a.py:2: 10 B')
self.assertEqual(str(trace), 'b.py:4: 10 B')
traceback = trace.traceback
self.assertEqual(str(traceback), 'a.py:2')
self.assertEqual(str(traceback), 'b.py:4')
frame = traceback[0]
self.assertEqual(str(frame), 'a.py:2')
self.assertEqual(str(frame), 'b.py:4')
def test_statistic_format(self):
snapshot, snapshot2 = create_snapshots()
@ -574,17 +577,32 @@ class TestSnapshot(unittest.TestCase):
side_effect=getline):
tb = snapshot.traces[0].traceback
self.assertEqual(tb.format(),
[' File "a.py", line 2',
' <a.py, 2>',
' File "b.py", line 4',
' <b.py, 4>'])
[' File "b.py", line 4',
' <b.py, 4>',
' File "a.py", line 2',
' <a.py, 2>'])
self.assertEqual(tb.format(limit=1),
[' File "a.py", line 2',
' <a.py, 2>'])
self.assertEqual(tb.format(limit=-1),
[])
[' File "b.py", line 4',
' <b.py, 4>'])
self.assertEqual(tb.format(most_recent_first=True),
[' File "a.py", line 2',
' <a.py, 2>',
' File "b.py", line 4',
' <b.py, 4>'])
self.assertEqual(tb.format(limit=1, most_recent_first=True),
[' File "a.py", line 2',
' <a.py, 2>'])
self.assertEqual(tb.format(limit=-1, most_recent_first=True),
[' File "b.py", line 4',
' <b.py, 4>'])
class TestFilters(unittest.TestCase):