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WIP: bpo-34990: year 2038 problem in compileall.py #9892

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matrixise wants to merge 12 commits into from
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WIP: bpo-34990: year 2038 problem in compileall.py #9892

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f4757a7
bpo-34990: year 2038 problem in compileall.py
matrixise Oct 15, 2018
96dbdab
Add a blurb entry
matrixise Oct 15, 2018
de197d1
Support unsigned long in the tests of compileall.py
matrixise Oct 15, 2018
377f565
Add a test with compileall and the .pyc file with a timestamp >= 2018…
matrixise Oct 15, 2018
b7e89cc
Use unsigned long for the header size
matrixise Oct 17, 2018
eca7980
Use a bitwise 0xFFFF_FFFF on the mtime of the .pyc files
matrixise Oct 17, 2018
2cc344c
Update
matrixise Oct 17, 2018
dc57dde
Fix the mask
matrixise Oct 17, 2018
efdae35
Move test_compile_all_2038 to CompileallTestsBase
matrixise Oct 17, 2018
1f30292
reword the blurb entry
matrixise Oct 17, 2018
4ed1e74
Update importlib_external after the modifications in importlib
matrixise Oct 17, 2018
ca6c049
Revert my modification in Lib/importlib/_bootstrap_external.py: useless,
matrixise Oct 17, 2018
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2 changes: 1 addition & 1 deletion Lib/importlib/_bootstrap_external.py
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Original file line number Diff line number Diff line change
Expand Up @@ -586,7 +586,7 @@ def _code_to_timestamp_pyc(code, mtime=0, source_size=0):
"Produce the data for a timestamp-based pyc."
data = bytearray(MAGIC_NUMBER)
data.extend(_pack_uint32(0))
data.extend(_pack_uint32(mtime))
data.extend(_pack_uint32(mtime) & 0xFFFF_FFFF)
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@vstinner vstinner Oct 17, 2018

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This change is useless, _pack_uint32() already does "& 0xFFFFFFFF". importlib can be left unchanged.

data.extend(_pack_uint32(source_size))
data.extend(marshal.dumps(code))
return data
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2 changes: 1 addition & 1 deletion Lib/test/test_zipimport.py
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Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,7 @@ def make_pyc(co, mtime, size):
else:
mtime = int(-0x100000000 + int(mtime))
pyc = (importlib.util.MAGIC_NUMBER +
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@serhiy-storchaka serhiy-storchaka Oct 17, 2018

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I think the above few lines can be removed.

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@matrixise matrixise Oct 17, 2018

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the lines from 38->41?

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@serhiy-storchaka serhiy-storchaka Oct 18, 2018

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Yes. They are roughly equivalent to mtime = int(mtime) & 0xFFFF_FFFF if use an unsigned integer format.

struct.pack("<iii", 0, int(mtime) & 0xFFFF_FFFF, size & 0xFFFF_FFFF) + data)
struct.pack("<iii", 0, int(mtime), size & 0xFFFF_FFFF) + data)
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@bmwiedemann bmwiedemann Oct 17, 2018

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why this revert?

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@matrixise matrixise Oct 17, 2018

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just because @serhiy-storchaka indicated that the signed was used here.

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@serhiy-storchaka serhiy-storchaka Oct 18, 2018

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I meant that you need to update the format string.

return pyc

def module_path_to_dotted_name(path):
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4 changes: 2 additions & 2 deletions Tools/scripts/checkpyc.py
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Expand Up @@ -51,10 +51,10 @@ def main():
print('Bad MAGIC word in ".pyc" file', end=' ')
print(repr(name_c))
continue
mtime = get_long(mtime_str) & 0xFFFF_FFFF
mtime = get_long(mtime_str)
if mtime in {0, -1}:
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@serhiy-storchaka serhiy-storchaka Oct 17, 2018

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mtime can't be -1 after adding & 0xFFFF_FFFF.

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@matrixise matrixise Oct 17, 2018

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maybe add the 0xFFFF_FFFF on the line 57?

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@serhiy-storchaka serhiy-storchaka Oct 18, 2018

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Yes.

print('Bad ".pyc" file', repr(name_c))
elif mtime != st[ST_MTIME]:
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@vstinner vstinner Oct 17, 2018

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I don't know if this code should be modified, but it is modified: should we also cast to int()?

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@matrixise matrixise Oct 17, 2018

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like that?

elif int(mtime) != int(st[ST_MTIME] & 0xFFFF_FFFF)

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@serhiy-storchaka serhiy-storchaka Oct 18, 2018

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mtime is already int. But st[ST_MTIME] is float.

elif mtime != (st[ST_MTIME] & 0xFFFF_FFFF):
print('Out-of-date ".pyc" file', end=' ')
print(repr(name_c))

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