a misunderstanding of the refcont behavior of the 'O' format code in
PyArg_ParseTuple() and Py_BuildValue(), respectively.
- pobj is only a borrowed reference, so should *not* be DECREF'ed at
the end. This was the cause of SF bug #470635.
- The Py_BuildValue() call would leak the object produced by
makesockaddr(). (I found this by eyeballing the code.)
Add a fast_container member to Picklerobject. If fast is true, then
fast_container counts the depth of nested container calls. If the
depth exceeds FAST_LIMIT (2000), the fast flag is ignored and the
normal checks occur. This approach is much like the approach for
prevent stack overflow for comparison and reprs of recursive objects
(e.g. [[...]]).
- Fast container used for save_list(), save_dict(), and
save_inst().
XXX Not clear which other save_xxx() functions should use it.
Make Picklerobject into new-style types, using PyObject_GenericGetAttr()
and PyObject_GenericSetAttr().
- Use PyMemberDef for binary and fast members
- Use PyGetSetDef for persistent_id, inst_persistent_id, memo, and
PicklingError.
XXX Not all of these seem like they need to use getset, but it's
not clear why the old getattr() and setattr() had such odd
semantics. One change is that the getvalue() attribute will
exist on all Picklers, not just list-based picklers; I think
this is a more rationale interface.
There is a long laundry list of other changes:
- Remove unused #defines for PyList_SET_ITEM() etc.
- Make some of the indentation consistent
- Replace uses of cPickle_PyMapping_HasKey() where the first
argument is self->memo with calls to PyDict_GetItem(), because
self->memo must be a dictionary.
- Don't bother to check if cPickle_PyMapping_HasKey() returns < 0,
because it can only return 0 or 1.
- Replace uses of PyObject_CallObject() with PyObject_Call(), when
we can guarantee that the argument tuple is really a tuple.
Performance impacts of these changes:
- 5% speedup for normal pickling
- No change to fast-mode pickling.
XXX Really need tests for all the features in cPickle that aren't in
pickle.
The platform requires 8-byte alignment for doubles, but the GC header
was 12 bytes and that threw off the natural alignment of the double
members of a subtype of complex. The fix puts the GC header into a
union with a double as the other member, to force no-looser-than
double alignment of GC headers. On boxes that require 8-byte alignment
for doubles, this may add pad bytes to the GC header accordingly; ditto
for platforms that *prefer* 8-byte alignment for doubles. On platforms
that don't care, it shouldn't change the memory layout (because the
size of the old GC header is certainly greater than the size of a double
on all platforms, so unioning with a double shouldn't change size or
alignment on such boxes).
Use #define X509_NAME_MAXLEN for server/issuer length on an SSL
object.
Update doc strings for socket.ssl() and ssl methods read() and
write().
PySSL_SSLwrite(): Check return value and raise exception on error.
Use int for len instead of size_t. (All the function the size_t obj
was passed to our from expected an int!)
PySSL_SSLread(): Check return value of PyArg_ParseTuple()! More
robust checks of return values from SSL_read().
Change all the local names that start with SSL to start with PySSL.
The OpenSSL library defines lots of calls that start with "SSL_". The
calls for Python's SSL objects also started with "SSL_". This choice
made it really confusing to figure out which calls were to the library
and which calls were local to the file.
Add PySSL_SetError() that sets an exception based on the information
from SSL_get_error(). This function will eventually replace all the
calls that set it with an error message that is based on the name of
the call that failed rather than the reason it failed. (Example: If
SSL_connect() failed it used to report "SSL_connect error" now it will
offer a specific message about why SSL_connect failed.)
XXX It might be helpful to augment the error message generated
below with the name of the SSL function that generated the error.
I expect it's obvious most of the time.
Remove several unnecessary INCREFs in the module's constructor call.
PyDict_SetItem() and friends do the INCREF for you.
In SSL_dealloc(), free/dealloc them only if they're non-NULL.
Fixes some obvious core dumps, but not sure yet if there are more
semantics to the SSL calls that would affect the dealloc.
XXX [1] These changes aren't tested very thoroughly, because regrtest
doesn't do any SSL tests. I've done some trivial tests on my own, but
don't really know how to use the key and cert files. In one case, an
SSL-level error causes Python to dump core. I'll get the fixed in the
next round of changes.
XXX [2] The checkin removes the x_attr member of the SSLObject struct.
I'm not sure if this is kosher for backwards compatibility at the
binary level. Perhaps its safer to keep the member but keep it
assigned to NULL.
And the leaks?
newSSLObject() called PyDict_New(), stored the result in x_attr
without checking it, and later stored NULL in x_attr without doing
anything to the dict. So the dict always leaks. There is no further
reference to x_attr, so I just removed it completely.
The error cases in newSSLObject() passed the return value of
PyString_FromString() directly to PyErr_SetObject().
PyErr_SetObject() expects a borrowed reference, so the string leaked.
This simplifies the rounding in _PyObject_VAR_SIZE, allows to restore the
pre-rounding calling sequence, and allows some nice little simplifications
in its callers. I'm still making it return a size_t, though.
As Guido suggested, this makes the new subclassing code substantially
simpler. But the mechanics of doing it w/ C macro semantics are a mess,
and _PyObject_VAR_SIZE has a new calling sequence now.
Question: The PyObject_NEW_VAR macro appears to be part of the public API.
Regardless of what it expands to, the notion that it has to round up the
memory it allocates is new, and extensions containing the old
PyObject_NEW_VAR macro expansion (which was embedded in the
PyObject_NEW_VAR expansion) won't do this rounding. But the rounding
isn't actually *needed* except for new-style instances with dict pointers
after a variable-length blob of embedded data. So my guess is that we do
not need to bump the API version for this (as the rounding isn't needed
for anything an extension can do unless it's recompiled anyway). What's
your guess?
pad memory to properly align the __dict__ pointer in all cases.
gcmodule.c/objimpl.h, _PyObject_GC_Malloc:
+ Added a "padding" argument so that this flavor of malloc can allocate
enough bytes for alignment padding (it can't know this is needed, but
its callers do).
typeobject.c, PyType_GenericAlloc:
+ Allocated enough bytes to align the __dict__ pointer.
+ Sped and simplified the round-up-to-PTRSIZE logic.
+ Added blank lines so I could parse the if/else blocks <0.7 wink>.
Generalize PyLong_AsLongLong to accept int arguments too. The real point
is so that PyArg_ParseTuple's 'L' code does too. That code was
undocumented (AFAICT), so documented it.
#424002.
Refactor init_path_from_argv0() and rename to copy_absolute(); add
absolutize() which does the same in-place.
Clean up whitespace (leading tabs -> spaces, delete trailing
spaces/tabs).
Add raise_exception() to the _testcapi module. It isn't a test, but
the C API exists only to support test_exceptions. raise_exception()
takes two arguments -- an exception class and an integer specifying
how many arguments it should be called with.
test_exceptions uses BadException() to test the interpreter's behavior
when there is a problem instantiating the exception. test_capi1()
calls it with too many arguments. test_capi2() causes an exception to
be raised in the Python code of the constructor.
no backwards compatibility to worry about, so I just pushed the
'closure' struct member to the back -- it's never used in the current
code base (I may eliminate it, but that's more work because the getter
and setter signatures would have to change.)
As examples, I added actual docstrings to the getset attributes of a
few types: file.closed, xxsubtype.spamdict.state.
compatibility, this required all places where an array of "struct
memberlist" structures was declared that is referenced from a type's
tp_members slot to change the type of the structure to PyMemberDef;
"struct memberlist" is now only used by old code that still calls
PyMember_Get/Set. The code in PyObject_GenericGetAttr/SetAttr now
calls the new APIs PyMember_GetOne/SetOne, which take a PyMemberDef
argument.
As examples, I added actual docstrings to the attributes of a few
types: file, complex, instance method, super, and xxsubtype.spamlist.
Also converted the symtable to new style getattr.
#462270: sub-tle difference between pre.sub and sre.sub. PRE ignored
an empty match at the previous location, SRE didn't.
also synced with Secret Labs "sreopen" codebase.
Martin v. Löwis
Tim Peters
Fred Drake
Guido van Rossum
Jeremy Hylton
Andrew M. Kuchling
Greg Ward
Marc-André Lemburg
Barry Warsaw
Fredrik Lundh