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Test PR to trigger build in my fork #1

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Test PR to trigger build in my fork #1

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hugovk
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@hugovk hugovk commented Aug 6, 2020

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@hugovk hugovk mentioned this pull request Aug 6, 2020
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@hugovk hugovk closed this Aug 9, 2020
hugovk pushed a commit that referenced this pull request Dec 13, 2020
@ssbr
bpo-40791: Make compare_digest more constant-time. (pythonGH-20444)
3172936 
* bpo-40791: Make compare_digest more constant-time.

The existing volatile `left`/`right` pointers guarantee that the reads will all occur, but does not guarantee that they will be _used_. So a compiler can still short-circuit the loop, saving e.g. the overhead of doing the xors and especially the overhead of the data dependency between `result` and the reads. That would change performance depending on where the first unequal byte occurs. This change removes that optimization.

(This is change #1 from https://bugs.python.org/issue40791 .)
@hugovk hugovk deleted the temp-ci-test branch May 4, 2021 11:20
hugovk pushed a commit that referenced this pull request Nov 18, 2021
@miss-islington @tiran
bpo-40955: Fix memory leak in subprocess module (pythonGH-20825)
ee3f7fe 
```
Direct leak of 8 byte(s) in 1 object(s) allocated from:
    GH-0 0x7f008bf19667 in __interceptor_malloc (/lib64/libasan.so.6+0xb0667)
    GH-1 0x7f007a0bee4a in subprocess_fork_exec /home/heimes/dev/python/cpython/Modules/_posixsubprocess.c:774
    GH-2 0xe0305b in cfunction_call Objects/methodobject.c:546
```

Signed-off-by: Christian Heimes <[email protected]>
(cherry picked from commit 0d3350d)

Co-authored-by: Christian Heimes <[email protected]>
hugovk pushed a commit that referenced this pull request Nov 18, 2021
@miss-islington @ssbr
bpo-40791: Make compare_digest more constant-time. (pythonGH-20444)
c1bbca5 
* bpo-40791: Make compare_digest more constant-time.

The existing volatile `left`/`right` pointers guarantee that the reads will all occur, but does not guarantee that they will be _used_. So a compiler can still short-circuit the loop, saving e.g. the overhead of doing the xors and especially the overhead of the data dependency between `result` and the reads. That would change performance depending on where the first unequal byte occurs. This change removes that optimization.

(This is change GH-1 from https://bugs.python.org/issue40791 .)
(cherry picked from commit 3172936)

Co-authored-by: Devin Jeanpierre <[email protected]>
hugovk pushed a commit that referenced this pull request Feb 2, 2022
@vstinner
bpo-46600: Fix test_gdb.test_pycfunction() for clang -Og (pythonGH-31058
bebaa95 
)

Fix test_gdb.test_pycfunction() for Python built with clang -Og.
Tolerate inlined functions in the gdb traceback.

When _testcapimodule.c is built by clang -Og, _null_to_none() is
inlined in meth_varargs() and so gdb returns _null_to_none() as
the frame #1. If it's not inlined, meth_varargs() is the frame #1.
hugovk pushed a commit that referenced this pull request Apr 23, 2022
@gpshead
pythongh-89455: Fix an uninitialized bool in exception print context. (…
861974b 
…python#91466)

Fix an uninitialized bool in exception print context.
    
`struct exception_print_context.need_close` was uninitialized.
    
Found by oss-fuzz in a test case running under the undefined behavior sanitizer.
    
https://oss-fuzz.com/testcase-detail/6217746058182656
    
```
Python/pythonrun.c:1241:28: runtime error: load of value 253, which is not a valid value for type 'bool'
    #0 0xbf2203 in print_chained cpython3/Python/pythonrun.c:1241:28
    #1 0xbea4bb in print_exception_cause_and_context cpython3/Python/pythonrun.c:1320:19
    #2 0xbea4bb in print_exception_recursive cpython3/Python/pythonrun.c:1470:13
    #3 0xbe9e39 in _PyErr_Display cpython3/Python/pythonrun.c:1517:9
```
    
Pretty obvious what the ommission was upon code inspection.
hugovk pushed a commit that referenced this pull request Sep 4, 2023
@vstinner
Revert "pythongh-46376: Return existing pointer when possible in ctyp…
5a79d2a 
…es (#1… (python#108688)

This reverts commit 08447b5.

Revert also _ctypes.c changes of the PyDict_ContainsString() change,
commit 6726626.
hugovk pushed a commit that referenced this pull request Sep 4, 2023
@vstinner @hugovk
Revert "pythongh-46376: Return existing pointer when possible in ctyp…
140a165 
…es (#1… (python#108688)

This reverts commit 08447b5.

Revert also _ctypes.c changes of the PyDict_ContainsString() change,
commit 6726626.
hugovk pushed a commit that referenced this pull request Jun 16, 2024
@vstinner
[3.12] Revert "[3.12] pythongh-69214: Fix fcntl.ioctl() request type (p…
34a0e7a 
…ython#119498) (#1… (python#119905)

Revert "[3.12] pythongh-69214: Fix fcntl.ioctl() request type (python#119498) (python#119505)"

This reverts commit 078da88.

The change modified how negative values, like termios.TIOCSWINSZ, was
treated and is actually backward incompatible.
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@hugovk