Issue #2620: Overflow checking when allocating or reallocating memory
was not always being done properly in some python types and extension
modules. PyMem_MALLOC, PyMem_REALLOC, PyMem_NEW and PyMem_RESIZE have
all been updated to perform better checks and places in the code that
would previously leak memory on the error path when such an allocation
failed have been fixed.
When a thread touches such an object for the first time, a new thread-local __dict__ is created,
and the __init__ method is run.
But a thread switch can occur here; if the other thread touches the same object, it installs another
__dict__; when the first thread resumes, it updates the dictionary of the second...
This is the deep cause of the failures in test_multiprocessing involving "managers" objects.
Backport of r64601.
Fix chown on 64-bit linux. It needed to take a long (64-bit on 64bit linux) as
uid and gid input to accept values >=2**31 as valid while still accepting
negative numbers to pass -1 to chown for "no change".
Fixes issue1747858.
Merge this fix from the pybsddb tree:
r293 | jcea | 2008-01-31 01:08:19 -0800 (Thu, 31 Jan 2008) | 4 lines
Solved memory leak when using cursors with
databases without environment.
Fix a potential 'SystemError: NULL result without error'.
NULL may be a valid return value from PyLong_AsVoidPtr.
Also move an older ctypes NEWS item in the correct category.
Merged revisions 59925 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk/Modules/_ctypes
........
r59925 | thomas.heller | 2008-01-11 20:34:06 +0100 (Fr, 11 Jan 2008) | 5 lines
Raise an error instead of crashing with a segfault when a NULL
function pointer is called.
Will backport to release25-maint.
........
statement recompilation with no bound parameters lead to a segfault
- Backported a fix necessary because of an SQLite API change in version 3.5.
This prevents segfaults when executing empty queries, like our test suite
does.
Undoes incorrect dbtables fix and errant strdup introduced as
described below:
r58757 | gregory.p.smith | 2007-11-01 14:08:14 -0700 (Thu, 01 Nov 2007) | 4 lines
Fix bug introduced in revision 58385. Database keys could no longer
have NULL bytes in them. Replace the errant strdup with a
malloc+memcpy. Adds a unit test for the correct behavior.
r58758 | gregory.p.smith | 2007-11-01 14:15:36 -0700 (Thu, 01 Nov 2007) | 3 lines
Undo revision 58533 58534 fixes. Those were a workaround for
a problem introduced by 58385.
r58759 | gregory.p.smith | 2007-11-01 14:17:47 -0700 (Thu, 01 Nov 2007) | 2 lines
false "fix" undone as correct problem was found and fixed.
Hirokazu Yamamoto
Georg Brandl
Gregory P. Smith
Neal Norwitz
Amaury Forgeot d'Arc
Martin v. Löwis
Thomas Heller
Gerhard Häring
Guido van Rossum
Raymond Hettinger
Andrew MacIntyre
Andrew M. Kuchling
Brett Cannon
Christian Heimes
Sean Reifscheider
Armin Rigo
Matthias Klose