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GH-93621: reorder code in with/async-with exception exit path to reduce the size of the exception table #93622

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Merged
merged 6 commits into from
Jun 10, 2022
Merged

GH-93621: reorder code in with/async-with exception exit path to reduce the size of the exception table #93622

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acf066c
reorder code in with/async-with exception exit path to reduce the siz…
iritkatriel Jun 8, 2022
4966724
📜🤖 Added by blurb_it.
blurb-it[bot] Jun 9, 2022
dc96fbe
add direct dis tests for with and async-with
iritkatriel Jun 9, 2022
946a191
add some checks for the exception table in dis output
iritkatriel Jun 9, 2022
61729a3
Merge remote-tracking branch 'upstream/main' into with-exception
iritkatriel Jun 9, 2022
38b21f1
update tests after merge
iritkatriel Jun 9, 2022
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add some checks for the exception table in dis output
  • Loading branch information
@iritkatriel
iritkatriel committed Jun 9, 2022
commit 946a191a62e13e17f8ba564c43b2571812687abb
20 changes: 20 additions & 0 deletions Lib/test/test_dis.py
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Original file line number Diff line number Diff line change
Expand Up @@ -389,6 +389,7 @@ def bug42562():
POP_EXCEPT
RERAISE 1
ExceptionTable:
4 rows
""" % (TRACEBACK_CODE.co_firstlineno,
TRACEBACK_CODE.co_firstlineno + 1,
TRACEBACK_CODE.co_firstlineno + 2,
Expand Down Expand Up @@ -464,6 +465,7 @@ def _with(c):
POP_EXCEPT
RERAISE 1
ExceptionTable:
2 rows
""" % (_with.__code__.co_firstlineno,
_with.__code__.co_firstlineno + 1,
_with.__code__.co_firstlineno + 2,
Expand Down Expand Up @@ -536,6 +538,7 @@ async def _asyncwith(c):
POP_EXCEPT
RERAISE 1
ExceptionTable:
2 rows
""" % (_asyncwith.__code__.co_firstlineno,
_asyncwith.__code__.co_firstlineno + 1,
_asyncwith.__code__.co_firstlineno + 2,
Expand Down Expand Up @@ -580,6 +583,7 @@ def _tryfinallyconst(b):
POP_EXCEPT
RERAISE 1
ExceptionTable:
2 rows
""" % (_tryfinally.__code__.co_firstlineno,
_tryfinally.__code__.co_firstlineno + 1,
_tryfinally.__code__.co_firstlineno + 2,
Expand Down Expand Up @@ -609,6 +613,7 @@ def _tryfinallyconst(b):
POP_EXCEPT
RERAISE 1
ExceptionTable:
1 row
""" % (_tryfinallyconst.__code__.co_firstlineno,
_tryfinallyconst.__code__.co_firstlineno + 1,
_tryfinallyconst.__code__.co_firstlineno + 2,
Expand Down Expand Up @@ -803,6 +808,18 @@ def assert_offsets_increasing(self, text, delta):
self.assertGreaterEqual(offset, expected_offset, line)
expected_offset = offset + delta

def assert_exception_table_increasing(self, lines):
prev_start, prev_end = -1, -1
count = 0
for line in lines:
m = re.match(r' (\d+) to (\d+) -> \d+ \[\d+\]', line)
start, end = [int(g) for g in m.groups()]
self.assertGreaterEqual(end, start)
self.assertGreater(start, prev_end)
prev_start, prev_end = start, end
count += 1
return count

def strip_offsets(self, text):
lines = text.splitlines(True)
start, end = self.find_offset_column(lines)
Expand All @@ -816,6 +833,9 @@ def strip_offsets(self, text):
res.append(line)
else:
res.append(line[:start] + line[end:])
num_rows = self.assert_exception_table_increasing(lines)
if num_rows:
res.append(f"{num_rows} row{'s' if num_rows > 1 else ''}\n")
return "".join(res)

def do_disassembly_compare(self, got, expected, with_offsets=False):
Expand Down
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