svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r82966 | stefan.krah | 2010-07-19 14:36:57 +0200 (Mon, 19 Jul 2010) | 13 lines
Issue #9036: Throughout the code base, Py_CHARMASK is used on 8-bit wide
signed/unsigned chars or on integers directly derived from those. In all
cases, it could be replaced by a simple cast to (unsigned char). Reasons
for the change:
a) Make the comment more explicit.
b) If char is unsigned, the cast is optimized away.
c) If char is unsigned, gcc emits spurious "array subscript
has type 'char'" warnings.
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signed/unsigned chars or on integers directly derived from those. In all
cases, it could be replaced by a simple cast to (unsigned char). Reasons
for the change:
a) Make the comment more explicit.
b) If char is unsigned, the cast is optimized away.
c) If char is unsigned, gcc emits spurious "array subscript
has type 'char'" warnings.
svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r82059 | victor.stinner | 2010-06-18 01:08:50 +0200 (ven., 18 juin 2010) | 5 lines
Issue #6543: Write the traceback in the terminal encoding instead of utf-8.
Fix the encoding of the modules filename.
Reindent also traceback.h, just because I hate tabs :-)
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r82061 | victor.stinner | 2010-06-18 01:17:37 +0200 (ven., 18 juin 2010) | 2 lines
Issue #6543: Mention the author of the patch, Amaury Forgeot d'Arc
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(instances of int, float, complex, decimal.Decimal and
fractions.Fraction) that makes it easy to maintain the invariant that
hash(x) == hash(y) whenever x and y have equal value.
svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r81400 | antoine.pitrou | 2010-05-21 19:25:34 +0200 (ven., 21 mai 2010) | 12 lines
Merged revisions 81398 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r81398 | antoine.pitrou | 2010-05-21 19:12:38 +0200 (ven., 21 mai 2010) | 6 lines
Issue #5753: A new C API function, :cfunc:`PySys_SetArgvEx`, allows
embedders of the interpreter to set sys.argv without also modifying
sys.path. This helps fix `CVE-2008-5983
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5983>`_.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r81398 | antoine.pitrou | 2010-05-21 19:12:38 +0200 (ven., 21 mai 2010) | 6 lines
Issue #5753: A new C API function, :cfunc:`PySys_SetArgvEx`, allows
embedders of the interpreter to set sys.argv without also modifying
sys.path. This helps fix `CVE-2008-5983
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5983>`_.
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object to Py_FileSystemDefaultEncoding with the "surrogateescape" error
handler, return a bytes object. If Py_FileSystemDefaultEncoding is not set,
fall back to UTF-8.
svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r81168 | victor.stinner | 2010-05-14 17:58:55 +0200 (ven., 14 mai 2010) | 10 lines
Issue #8711: Document PyUnicode_DecodeFSDefault*() functions
* Add paragraph titles to c-api/unicode.rst.
* Fix PyUnicode_DecodeFSDefault*() comment: it now uses the "surrogateescape"
error handler (and not "replace")
* Remove "The function is intended to be used for paths and file names only
during bootstrapping process where the codecs are not set up." from
PyUnicode_FSConverter() comment: it is used after the bootstrapping and for
other purposes than file names
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* Add paragraph titles to c-api/unicode.rst.
* Fix PyUnicode_DecodeFSDefault*() comment: it now uses the "surrogateescape"
error handler (and not "replace")
* Remove "The function is intended to be used for paths and file names only
during bootstrapping process where the codecs are not set up." from
PyUnicode_FSConverter() comment: it is used after the bootstrapping and for
other purposes than file names
http://code.google.com/p/data-race-test/wiki/ThreadSanitizer is a dynamic data
race detector that runs on top of valgrind. With this patch, the binaries at
http://code.google.com/p/data-race-test/wiki/ThreadSanitizer#Binaries pass many
but not all of the Python tests. All of regrtest still passes outside of tsan.
I've implemented part of the C1x atomic types so that we can explicitly mark
variables that are used across threads, and get defined behavior as compilers
advance.
I've added tsan's client header and implementation to the codebase in
dynamic_annotations.{h,c} (docs at
http://code.google.com/p/data-race-test/wiki/DynamicAnnotations).
Unfortunately, I haven't been able to get helgrind and drd to give sensible
error messages, even when I use their client annotations, so I'm not supporting
them.
This fixes issue #8441: python.c is not included
in the framework while main.c is and without this
patch you get a link error when building
Python.framework on OSX.
module now takes an optional timeout argument in seconds. Timeout support
relies on the system threading library, so as to avoid a semi-busy wait
loop.
svn+ssh://pythondev@svn.python.org/python/trunk
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r79555 | antoine.pitrou | 2010-04-01 18:42:11 +0200 (jeu., 01 avril 2010) | 5 lines
Issue #8276: PyEval_CallObject() is now only available in macro form. The
function declaration, which was kept for backwards compatibility reasons,
is now removed (the macro was introduced in 1997!).
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svn+ssh://pythondev@svn.python.org/python/trunk
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r79060 | collin.winter | 2010-03-18 14:54:01 -0700 (Thu, 18 Mar 2010) | 4 lines
Add support for weak references to code objects. This will be used by an optimization in the incoming Python 3 JIT.
Patch by Reid Kleckner!
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POSIX systems with a C extension module. This is required in order for
the subprocess module to be made thread safe.
The pure python implementation is retained so that it can continue to be
used if for some reason the _posixsubprocess extension module is not
available.
The unittest executes tests on both code paths to guarantee compatibility.
* Moves PyLong_FromPid and PyLong_AsPid from posixmodule.c into longobject.h.
Code reviewed by jeffrey.yasskin at http://codereview.appspot.com/223077/show
svn+ssh://pythondev@svn.python.org/python/trunk
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r78393 | amaury.forgeotdarc | 2010-02-24 00:19:39 +0100 (mer., 24 févr. 2010) | 2 lines
#4852: Remove dead code in every thread implementation, unused for many years.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r78189 | mark.dickinson | 2010-02-14 13:40:30 +0000 (Sun, 14 Feb 2010) | 1 line
Silence more 'comparison between signed and unsigned' warnings.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r77842 | mark.dickinson | 2010-01-30 10:08:33 +0000 (Sat, 30 Jan 2010) | 4 lines
Issue #7767: Add new C-API function PyLong_AsLongLongAndOverflow, a
long long variant of PyLong_AsLongAndOverflow. Patch by Case Van
Horsen.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r77573 | antoine.pitrou | 2010-01-17 13:26:20 +0100 (dim., 17 janv. 2010) | 6 lines
Issue #7561: Operations on empty bytearrays (such as `int(bytearray())`)
could crash in many places because of the PyByteArray_AS_STRING() macro
returning NULL. The macro now returns a statically allocated empty
string instead.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r77234 | mark.dickinson | 2010-01-02 14:45:40 +0000 (Sat, 02 Jan 2010) | 7 lines
Refactor some longobject internals: PyLong_AsDouble and _PyLong_AsScaledDouble
(the latter renamed to _PyLong_Frexp) now use the same core code. The
exponent produced by _PyLong_Frexp now has type Py_ssize_t instead of the
previously used int, and no longer needs scaling by PyLong_SHIFT. This
frees the math module from having to know anything about the PyLong
implementation. This closes issue #5576.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r77088 | georg.brandl | 2009-12-28 09:34:58 +0100 (Mo, 28 Dez 2009) | 1 line
#7033: add new API function PyErr_NewExceptionWithDoc, for easily giving new exceptions a docstring.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r76822 | benjamin.peterson | 2009-12-13 15:21:43 -0600 (Sun, 13 Dec 2009) | 1 line
initialize to NULL
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r76824 | benjamin.peterson | 2009-12-13 15:27:53 -0600 (Sun, 13 Dec 2009) | 1 line
add a test of loading the datetime capi
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svn+ssh://pythondev@svn.python.org/python/trunk
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r76740 | mark.dickinson | 2009-12-10 10:36:32 +0000 (Thu, 10 Dec 2009) | 8 lines
Replace the size check for PyMem_MALLOC and PyMem_REALLOC with an almost
equivalent[*] check that doesn't produce compiler warnings about a 'x < 0'
check on an unsigned type.
[*] it's equivalent for inputs of type size_t or Py_ssize_t, or any smaller
unsigned or signed integer type.
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svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r76713 | ronald.oussoren | 2009-12-08 17:35:28 +0100 (Tue, 08 Dec 2009) | 11 lines
Merged revisions 76712 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r76712 | ronald.oussoren | 2009-12-08 17:32:52 +0100 (Tue, 08 Dec 2009) | 4 lines
Fix for issue 7452: HAVE_GCC_ASM_FOR_X87 gets set when doing a universal build on
an i386 based machine, but should only be active when compiling the x86 part of
the universal binary.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r76712 | ronald.oussoren | 2009-12-08 17:32:52 +0100 (Tue, 08 Dec 2009) | 4 lines
Fix for issue 7452: HAVE_GCC_ASM_FOR_X87 gets set when doing a universal build on
an i386 based machine, but should only be active when compiling the x86 part of
the universal binary.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r76623 | ronald.oussoren | 2009-12-01 16:54:01 +0100 (Tue, 01 Dec 2009) | 9 lines
Fix for issue #7416: SIZEOF_UINTPTR_T can be invalid when configuring a
multi-architecture build (in particular when the architectures don't share
a common pointer size).
Fixed the same issue for SIZEOF_PTHREAD_T.
(No update to the NEWS file because this is a bugfix for an as yet unreleased
feature)
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svn+ssh://pythondev@svn.python.org/python/trunk
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r76561 | mark.dickinson | 2009-11-28 12:30:36 +0000 (Sat, 28 Nov 2009) | 5 lines
Include ieeefp.h (when available) in pyport.h instead of individually in
Objects/floatobject.c and Objects/complexobject.c. This should silence
compiler warnings about implicit declaration of the 'finite' function
on Solaris.
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svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r75246 | benjamin.peterson | 2009-10-04 15:32:25 -0500 (Sun, 04 Oct 2009) | 29 lines
Merged revisions 74841 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r74841 | thomas.wouters | 2009-09-16 14:55:54 -0500 (Wed, 16 Sep 2009) | 23 lines
Fix issue #1590864, multiple threads and fork() can cause deadlocks, by
acquiring the import lock around fork() calls. This prevents other threads
from having that lock while the fork happens, and is the recommended way of
dealing with such issues. There are two other locks we care about, the GIL
and the Thread Local Storage lock. The GIL is obviously held when calling
Python functions like os.fork(), and the TLS lock is explicitly reallocated
instead, while also deleting now-orphaned TLS data.
This only fixes calls to os.fork(), not extension modules or embedding
programs calling C's fork() directly. Solving that requires a new set of API
functions, and possibly a rewrite of the Python/thread_*.c mess. Add a
warning explaining the problem to the documentation in the mean time.
This also changes behaviour a little on AIX. Before, AIX (but only AIX) was
getting the import lock reallocated, seemingly to avoid this very same
problem. This is not the right approach, because the import lock is a
re-entrant one, and reallocating would do the wrong thing when forking while
holding the import lock.
Will backport to 2.6, minus the tiny AIX behaviour change.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r74841 | thomas.wouters | 2009-09-16 14:55:54 -0500 (Wed, 16 Sep 2009) | 23 lines
Fix issue #1590864, multiple threads and fork() can cause deadlocks, by
acquiring the import lock around fork() calls. This prevents other threads
from having that lock while the fork happens, and is the recommended way of
dealing with such issues. There are two other locks we care about, the GIL
and the Thread Local Storage lock. The GIL is obviously held when calling
Python functions like os.fork(), and the TLS lock is explicitly reallocated
instead, while also deleting now-orphaned TLS data.
This only fixes calls to os.fork(), not extension modules or embedding
programs calling C's fork() directly. Solving that requires a new set of API
functions, and possibly a rewrite of the Python/thread_*.c mess. Add a
warning explaining the problem to the documentation in the mean time.
This also changes behaviour a little on AIX. Before, AIX (but only AIX) was
getting the import lock reallocated, seemingly to avoid this very same
problem. This is not the right approach, because the import lock is a
re-entrant one, and reallocating would do the wrong thing when forking while
holding the import lock.
Will backport to 2.6, minus the tiny AIX behaviour change.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r72487 | jeffrey.yasskin | 2009-05-08 17:51:06 -0400 (Fri, 08 May 2009) | 7 lines
PyCode_NewEmpty:
Most uses of PyCode_New found by http://www.google.com/codesearch?q=PyCode_New
are trying to build an empty code object, usually to put it in a dummy frame
object. This patch adds a PyCode_NewEmpty wrapper which lets the user specify
just the filename, function name, and first line number, instead of also
requiring lots of code internals.
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r72488 | jeffrey.yasskin | 2009-05-08 18:23:21 -0400 (Fri, 08 May 2009) | 13 lines
Issue 5954, PyFrame_GetLineNumber:
Most uses of PyCode_Addr2Line
(http://www.google.com/codesearch?q=PyCode_Addr2Line) are just trying to get
the line number of a specified frame, but there's no way to do that directly.
Forcing people to go through the code object makes them know more about the
guts of the interpreter than they should need.
The remaining uses of PyCode_Addr2Line seem to be getting the line from a
traceback (for example,
http://www.google.com/codesearch/p?hl=en#u_9_nDrchrw/pygame-1.7.1release/src/base.c&q=PyCode_Addr2Line),
which is replaced by the tb_lineno field. So we may be able to deprecate
PyCode_Addr2Line entirely for external use.
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r72879 | jeffrey.yasskin | 2009-05-23 19:23:01 -0400 (Sat, 23 May 2009) | 14 lines
Issue #6042:
lnotab-based tracing is very complicated and isn't documented very well. There
were at least 3 comment blocks purporting to document co_lnotab, and none did a
very good job. This patch unifies them into Objects/lnotab_notes.txt which
tries to completely capture the current state of affairs.
I also discovered that we've attached 2 layers of patches to the basic tracing
scheme. The first layer avoids jumping to instructions that don't start a line,
to avoid problems in if statements and while loops. The second layer
discovered that jumps backward do need to trace at instructions that don't
start a line, so it added extra lnotab entries for 'while' and 'for' loops, and
added a special case for backward jumps within the same line. I replaced these
patches by just treating forward and backward jumps differently.
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svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r73782 | benjamin.peterson | 2009-07-02 16:44:01 -0500 (Thu, 02 Jul 2009) | 1 line
the old CO_FUTURE flags can't be commented out
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r73783 | benjamin.peterson | 2009-07-02 16:54:36 -0500 (Thu, 02 Jul 2009) | 1 line
a little more fiddling to make flags like 2.x
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r73784 | benjamin.peterson | 2009-07-02 16:55:39 -0500 (Thu, 02 Jul 2009) | 9 lines
Merged revisions 73781 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r73781 | benjamin.peterson | 2009-07-02 16:38:36 -0500 (Thu, 02 Jul 2009) | 1 line
test that compile() accepts the future flag
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svn+ssh://pythondev@svn.python.org/python/trunk
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r73376 | benjamin.peterson | 2009-06-11 17:29:23 -0500 (Thu, 11 Jun 2009) | 1 line
remove check for case handled in sub-function
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r73393 | alexandre.vassalotti | 2009-06-12 13:56:57 -0500 (Fri, 12 Jun 2009) | 2 lines
Clear reference to the static PyExc_RecursionErrorInst in _PyExc_Fini.
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r73398 | alexandre.vassalotti | 2009-06-12 15:57:12 -0500 (Fri, 12 Jun 2009) | 3 lines
Add const qualifier to PyErr_SetFromErrnoWithFilename and to
PyErr_SetFromErrnoWithUnicodeFilename.
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r73400 | alexandre.vassalotti | 2009-06-12 16:43:47 -0500 (Fri, 12 Jun 2009) | 2 lines
Delete outdated make file for building the parser with MSVC 6.
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r73404 | benjamin.peterson | 2009-06-12 20:40:00 -0500 (Fri, 12 Jun 2009) | 1 line
keep the slice.step field as NULL if no step expression is given
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r73405 | benjamin.peterson | 2009-06-12 22:46:30 -0500 (Fri, 12 Jun 2009) | 1 line
prevent import statements from assigning to None
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r73409 | benjamin.peterson | 2009-06-13 08:06:21 -0500 (Sat, 13 Jun 2009) | 1 line
allow importing from a module named None if it has an 'as' clause
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r73419 | benjamin.peterson | 2009-06-13 11:19:19 -0500 (Sat, 13 Jun 2009) | 1 line
set Print.values to NULL if there are no values
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r73420 | benjamin.peterson | 2009-06-13 12:08:53 -0500 (Sat, 13 Jun 2009) | 1 line
give a better error message when deleting ()
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r73421 | benjamin.peterson | 2009-06-13 15:23:33 -0500 (Sat, 13 Jun 2009) | 1 line
when no module is given in a 'from' relative import, make ImportFrom.module NULL
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r73432 | amaury.forgeotdarc | 2009-06-14 16:20:40 -0500 (Sun, 14 Jun 2009) | 3 lines
#6227: Because of a wrong indentation, the test was not testing what it should.
Ensure that the snippet in doctest_aliases actually contains aliases.
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r73457 | benjamin.peterson | 2009-06-16 18:13:09 -0500 (Tue, 16 Jun 2009) | 1 line
add underscores
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r73460 | benjamin.peterson | 2009-06-16 22:23:04 -0500 (Tue, 16 Jun 2009) | 1 line
remove unused 'encoding' member from the compiler struct
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r73485 | benjamin.peterson | 2009-06-19 17:07:47 -0500 (Fri, 19 Jun 2009) | 1 line
remove duplicate test
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r73486 | benjamin.peterson | 2009-06-19 17:09:17 -0500 (Fri, 19 Jun 2009) | 1 line
add missing assertion #6313
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r73488 | benjamin.peterson | 2009-06-19 17:16:28 -0500 (Fri, 19 Jun 2009) | 1 line
show that this one isn't used
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r73489 | benjamin.peterson | 2009-06-19 17:21:12 -0500 (Fri, 19 Jun 2009) | 1 line
use closures
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r73501 | benjamin.peterson | 2009-06-21 18:01:07 -0500 (Sun, 21 Jun 2009) | 1 line
don't need to add the name 'lambda' as assigned
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r73502 | benjamin.peterson | 2009-06-21 18:03:36 -0500 (Sun, 21 Jun 2009) | 1 line
remove tmpname support since it's no longer used
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r73513 | benjamin.peterson | 2009-06-22 20:18:57 -0500 (Mon, 22 Jun 2009) | 1 line
fix grammar
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r73514 | benjamin.peterson | 2009-06-22 22:01:56 -0500 (Mon, 22 Jun 2009) | 1 line
remove some unused symtable constants
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svn+ssh://pythondev@svn.python.org/python/trunk
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r72912 | benjamin.peterson | 2009-05-25 08:13:44 -0500 (Mon, 25 May 2009) | 5 lines
add a SETUP_WITH opcode
It speeds up the with statement and correctly looks up the special
methods involved.
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r72920 | benjamin.peterson | 2009-05-25 15:12:57 -0500 (Mon, 25 May 2009) | 1 line
take into account the fact that SETUP_WITH pushes a finally block
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r72940 | benjamin.peterson | 2009-05-26 07:49:59 -0500 (Tue, 26 May 2009) | 1 line
teach the peepholer about SETUP_WITH
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svn+ssh://pythondev@svn.python.org/python/trunk
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r72924 | georg.brandl | 2009-05-25 23:02:56 +0200 (Mo, 25 Mai 2009) | 6 lines
Allow multiple context managers in one with statement, as proposed
in http://codereview.appspot.com/53094 and accepted by Guido.
The construct is transformed into multiple With AST nodes so that
there should be no problems with the semantics.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r72698 | hirokazu.yamamoto | 2009-05-17 11:52:09 +0900 | 1 line
Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.
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r72699 | hirokazu.yamamoto | 2009-05-17 11:58:36 +0900 | 1 line
Added NEWS for r72698.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r72283 | antoine.pitrou | 2009-05-04 20:32:32 +0200 (lun., 04 mai 2009) | 4 lines
Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal sequences.
Patch by Nick Barnes and Victor Stinner.
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r72284 | antoine.pitrou | 2009-05-04 20:32:50 +0200 (lun., 04 mai 2009) | 3 lines
Add Nick Barnes to ACKS.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r72040 | eric.smith | 2009-04-27 15:04:37 -0400 (Mon, 27 Apr 2009) | 1 line
Issue #5793: rationalize isdigit / isalpha / tolower, etc. Will port to py3k. Should fix Windows buildbot errors.
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problems for binary distributions of Python in situations
where the build machine has SSE2 but the target machine
does not.
Therefore, don't enable SSE2 instructions automatically on x86.
Addresses the float -> string conversion, using David Gay's code which
was added in Mark Dickinson's checkin r71663.
Also addresses these, which are intertwined with the short repr
changes:
- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'
- Issue #5515: 'n' formatting with commas no longer works poorly
with leading zeros.
- PEP 378 Format Specifier for Thousands Separator: implemented
for floats.
- incorporate and adapt David Gay's dtoa and strtod
into the Python core
- on platforms where we can use Gay's code (almost
all!), repr(float) is based on the shortest
sequence of decimal digits that rounds correctly.
- add sys.float_repr_style attribute to indicate
whether we're using Gay's code or not
- add autoconf magic to detect and enable SSE2
instructions on x86/gcc
- slight change to repr and str: repr switches
to exponential notation at 1e16 instead of
1e17, str switches at 1e11 instead of 1e12
This is incomplete, but I want to get some version into the next alpha. I am still working on:
Documentation.
More tests.
Implement for floats.
In addition, there's an existing bug with 'n' formatting that carries forward to thousands grouping (issue 5515).
svn+ssh://pythondev@svn.python.org/python/trunk
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r71031 | brett.cannon | 2009-04-01 20:17:39 -0700 (Wed, 01 Apr 2009) | 6 lines
PyImport_AppendInittab() took a char * as a first argument even though that
string was stored beyond the life of the call. Changed the signature to be
const char * to help make this point.
Closes issue #1419652.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r70546 | antoine.pitrou | 2009-03-23 19:41:45 +0100 (lun., 23 mars 2009) | 9 lines
Issue #4688: Add a heuristic so that tuples and dicts containing only
untrackable objects are not tracked by the garbage collector. This can
reduce the size of collections and therefore the garbage collection overhead
on long-running programs, depending on their particular use of datatypes.
(trivia: this makes the "binary_trees" benchmark from the Computer Language
Shootout 40% faster)
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svn+ssh://pythondev@svn.python.org/python/trunk
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r70489 | mark.dickinson | 2009-03-20 23:16:14 +0000 (Fri, 20 Mar 2009) | 4 lines
Rewrite Py_ARITHMETIC_RIGHT_SHIFT so that it's valid for all signed
integer types T, not just those for which "unsigned T" is legal.
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- new configure option --enable-big-digits
- new structseq sys.int_info giving information about the internal format
By default, 30-bit digits are enabled on 64-bit machines but
disabled on 32-bit machines.
This patch by Antoine Pitrou optimizes the bytecode for conditional branches by
merging the following "POP_TOP" instruction into the conditional jump. For
example, the list comprehension "[x for x in l if not x]" produced the
following bytecode:
1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 23 (to 32)
9 STORE_FAST 1 (x)
12 LOAD_FAST 1 (x)
15 JUMP_IF_TRUE 10 (to 28)
18 POP_TOP
19 LOAD_FAST 1 (x)
22 LIST_APPEND 2
25 JUMP_ABSOLUTE 6
>> 28 POP_TOP
29 JUMP_ABSOLUTE 6
>> 32 RETURN_VALUE
but after the patch it produces the following bytecode:
1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 18 (to 27)
9 STORE_FAST 1 (x)
12 LOAD_FAST 1 (x)
15 POP_JUMP_IF_TRUE 6
18 LOAD_FAST 1 (x)
21 LIST_APPEND 2
24 JUMP_ABSOLUTE 6
>> 27 RETURN_VALUE
Notice that not only the code is shorter, but the conditional jump
(POP_JUMP_IF_TRUE) jumps right to the start of the loop instead of going through
the JUMP_ABSOLUTE at the end. "continue" statements are helped
similarly.
Furthermore, the old jump opcodes (JUMP_IF_FALSE, JUMP_IF_TRUE) have been
replaced by two new opcodes:
- JUMP_IF_TRUE_OR_POP, which jumps if true and pops otherwise
- JUMP_IF_FALSE_OR_POP, which jumps if false and pops otherwise
svn+ssh://pythondev@svn.python.org/python/trunk
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r69634 | mark.dickinson | 2009-02-15 10:13:41 +0000 (Sun, 15 Feb 2009) | 6 lines
Issue #5260: Various portability and standards compliance fixes, optimizations
and cleanups in Objects/longobject.c. The most significant change is that
longs now use less memory: average savings are 2 bytes per long on 32-bit
systems and 6 bytes per long on 64-bit systems. (This memory saving already
exists in py3k.)
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svn+ssh://pythondev@svn.python.org/python/trunk
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r69364 | kristjan.jonsson | 2009-02-06 04:17:34 -0600 (Fri, 06 Feb 2009) | 1 line
Fix a number of Win32ErrorTests error cases. chmod wasn't being tested. 'access' never raises an error.
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r69365 | armin.rigo | 2009-02-06 05:46:26 -0600 (Fri, 06 Feb 2009) | 2 lines
Ivan on IRC in #twisted reported this crasher.
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r69409 | georg.brandl | 2009-02-07 06:21:17 -0600 (Sat, 07 Feb 2009) | 1 line
#5174: fix wrong file closing in example.
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r69410 | neil.schemenauer | 2009-02-07 08:53:31 -0600 (Sat, 07 Feb 2009) | 4 lines
Fix broken test in test_hotshot. Treating the current directory as an
empty file is sloppy and non-portable. Use NamedTemporaryFile to make
an empty file.
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r69413 | neil.schemenauer | 2009-02-07 12:35:16 -0600 (Sat, 07 Feb 2009) | 2 lines
Add test for issue #999042, explict global statement works.
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r69417 | benjamin.peterson | 2009-02-07 17:01:19 -0600 (Sat, 07 Feb 2009) | 1 line
document individual 2to3 fixers
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r69435 | benjamin.peterson | 2009-02-08 08:38:13 -0600 (Sun, 08 Feb 2009) | 1 line
document numliterals fixer
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r69442 | benjamin.peterson | 2009-02-08 09:14:57 -0600 (Sun, 08 Feb 2009) | 1 line
a few edits and typos
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r69447 | vinay.sajip | 2009-02-08 13:06:08 -0600 (Sun, 08 Feb 2009) | 2 lines
Issue #5170: Fixed Unicode output bug in logging and added test case. This is a regression which did not occur in 2.5.
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r69495 | kristjan.jonsson | 2009-02-10 07:32:24 -0600 (Tue, 10 Feb 2009) | 1 line
Issue 4804. Add a function to test the validity of file descriptors on Windows, and stop using global runtime settings to silence the warnings / assertions.
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r69519 | gregory.p.smith | 2009-02-11 17:45:25 -0600 (Wed, 11 Feb 2009) | 3 lines
Issue #1008086: Fixes socket.inet_aton() to always return 4 bytes even
on LP64 platforms (most 64-bit Linux, bsd, unix systems).
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r69520 | benjamin.peterson | 2009-02-11 21:50:00 -0600 (Wed, 11 Feb 2009) | 1 line
os.fsync() should be used to ensure that data is written to disk
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r69521 | benjamin.peterson | 2009-02-11 22:17:04 -0600 (Wed, 11 Feb 2009) | 1 line
no need for this __bases__ trick anymore
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svn+ssh://pythondev@svn.python.org/python/trunk
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r69459 | mark.dickinson | 2009-02-09 14:18:43 +0000 (Mon, 09 Feb 2009) | 3 lines
Issue #4575: fix Py_IS_INFINITY macro to work correctly on x87 FPUs.
It now forces its argument to double before testing for infinity.
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from object.h; don't inherit tp_compare slot on subclasses; and raise TypeError
when initializing a type that has a nonzero tp_compare slot. Fix up
comparison-related comments in object.c and code.h.
svn+ssh://pythondev@svn.python.org/python/trunk
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r68450 | jeffrey.yasskin | 2009-01-09 10:47:07 -0600 (Fri, 09 Jan 2009) | 3 lines
Fix issue 4884, preventing a crash in the socket code when python is compiled
with llvm-gcc and run with a glibc <2.10.
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r68480 | vinay.sajip | 2009-01-10 07:38:04 -0600 (Sat, 10 Jan 2009) | 1 line
Minor documentation changes cross-referencing NullHandler to the documentation on configuring logging in a library.
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r68481 | vinay.sajip | 2009-01-10 07:42:04 -0600 (Sat, 10 Jan 2009) | 1 line
Corrected an incorrect self-reference.
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r68493 | benjamin.peterson | 2009-01-10 11:18:55 -0600 (Sat, 10 Jan 2009) | 1 line
rewrite verbose conditionals
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r68495 | benjamin.peterson | 2009-01-10 11:36:44 -0600 (Sat, 10 Jan 2009) | 1 line
tp_iter only exists with Py_TPFLAGS_HAVE_ITER #4901
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r68501 | vinay.sajip | 2009-01-10 13:22:57 -0600 (Sat, 10 Jan 2009) | 1 line
Corrected minor typo and added .currentmodule directives to fix missing cross-references.
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r68512 | benjamin.peterson | 2009-01-10 16:42:10 -0600 (Sat, 10 Jan 2009) | 1 line
make tests fail if they can't be imported
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r68514 | benjamin.peterson | 2009-01-10 17:41:59 -0600 (Sat, 10 Jan 2009) | 1 line
move seealso to a more appropiate place
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r68515 | benjamin.peterson | 2009-01-10 17:49:08 -0600 (Sat, 10 Jan 2009) | 1 line
macos 9 isn't supported
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r68534 | gregory.p.smith | 2009-01-11 11:53:33 -0600 (Sun, 11 Jan 2009) | 2 lines
correct email address
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r68535 | gregory.p.smith | 2009-01-11 11:57:54 -0600 (Sun, 11 Jan 2009) | 9 lines
Update the documentation for binascii and zlib crc32/adler32 functions
to better describe the signed vs unsigned return value behavior on
different platforms and versions of python. Mention the workaround to
make them all return the same thing by using & 0xffffffff.
Fixes issue4903.
Also needs to be merged into release26-maint, release30-maint, & py3k.
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r68536 | benjamin.peterson | 2009-01-11 13:48:15 -0600 (Sun, 11 Jan 2009) | 1 line
add email addresses
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r68552 | vinay.sajip | 2009-01-12 14:36:18 -0600 (Mon, 12 Jan 2009) | 1 line
Minor changes/corrections in markup.
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r68563 | benjamin.peterson | 2009-01-12 19:49:10 -0600 (Mon, 12 Jan 2009) | 1 line
small logic correction
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r68570 | raymond.hettinger | 2009-01-13 03:08:32 -0600 (Tue, 13 Jan 2009) | 5 lines
Issue 4922: Incorrect comments for MutableSet.add() and MutableSet.discard().
Needs to be backported to 2.6 and forward ported to 3.0 and 3.1.
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r68571 | armin.ronacher | 2009-01-13 05:52:23 -0600 (Tue, 13 Jan 2009) | 3 lines
ast.literal_eval can properly evaluate complex numbers now. This fixes issue4907.
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r68572 | andrew.kuchling | 2009-01-13 07:40:54 -0600 (Tue, 13 Jan 2009) | 1 line
Note that first coord. is left alone
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r68575 | thomas.heller | 2009-01-13 11:32:28 -0600 (Tue, 13 Jan 2009) | 1 line
Fix refcount leak in error cases. Bug found by coverity.
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r68582 | georg.brandl | 2009-01-13 16:14:01 -0600 (Tue, 13 Jan 2009) | 2 lines
Use assertRaises.
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r68596 | amaury.forgeotdarc | 2009-01-13 17:39:22 -0600 (Tue, 13 Jan 2009) | 3 lines
#1162154: inspect.getmembers() now skips attributes that raise AttributeError,
e.g. a __slots__ attribute which has not been set.
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r68623 | vinay.sajip | 2009-01-15 16:48:13 -0600 (Thu, 15 Jan 2009) | 1 line
Made minor changes/corrections in markup. Added a couple of section headings.
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r68624 | vinay.sajip | 2009-01-15 17:04:47 -0600 (Thu, 15 Jan 2009) | 1 line
Minor changes/corrections in markup.
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r68628 | benjamin.peterson | 2009-01-15 20:55:24 -0600 (Thu, 15 Jan 2009) | 1 line
compare with == not is #4946
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svn+ssh://pythondev@svn.python.org/python/trunk
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r68560 | amaury.forgeotdarc | 2009-01-13 00:36:55 +0100 (mar., 13 janv. 2009) | 6 lines
#3720: Interpreter crashes when an evil iterator removes its own next function.
Now the slot is filled with a function that always raises.
Will not backport: extensions compiled with 2.6.x would not run on 2.6.0.
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flag to work properly. Furthermore, when specifying -u, the text stdout
and stderr streams have line-by-line buffering enabled (the default being
to buffer arbitrary chunks of data). Patch by Victor Stinner, test by me.
svn+ssh://pythondev@svn.python.org/python/trunk
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r68167 | vinay.sajip | 2009-01-02 12:53:04 -0600 (Fri, 02 Jan 2009) | 1 line
Minor documentation changes relating to NullHandler, the module used for handlers and references to ConfigParser.
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r68276 | tarek.ziade | 2009-01-03 18:04:49 -0600 (Sat, 03 Jan 2009) | 1 line
fixed#1702551: distutils sdist was not pruning VCS directories under win32
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r68292 | skip.montanaro | 2009-01-04 04:36:58 -0600 (Sun, 04 Jan 2009) | 3 lines
If user configures --without-gcc give preference to $CC instead of blindly
assuming the compiler will be "cc".
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r68293 | tarek.ziade | 2009-01-04 04:37:52 -0600 (Sun, 04 Jan 2009) | 1 line
using clearer syntax
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r68344 | marc-andre.lemburg | 2009-01-05 13:43:35 -0600 (Mon, 05 Jan 2009) | 7 lines
Fix#4846 (Py_UNICODE_ISSPACE causes linker error) by moving the declaration
into the extern "C" section.
Add a few more comments and apply some minor edits to make the file contents
fit the original structure again.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r68302 | mark.dickinson | 2009-01-04 16:06:40 +0000 (Sun, 04 Jan 2009) | 4 lines
Oops. Need to check not only that HAVE_DECL_ISINF is defined, but also
that it's equal to 1. (If isinf isn't defined, HAVE_DECL_ISINF is
defined to be 0, rather than being undefined.)
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svn+ssh://pythondev@svn.python.org/python/trunk
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r68296 | mark.dickinson | 2009-01-04 12:29:36 +0000 (Sun, 04 Jan 2009) | 6 lines
Add autoconf test to detect x87-style double rounding, as described in
issue #2937. This information can be helpful for diagnosing platform-
specific problems in math and cmath. The result of the test also
serves as a fairly reliable indicator of whether the x87 floating-point
instructions (as opposed to SSE2) are in use on Intel x86/x86_64 systems.
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r68299 | mark.dickinson | 2009-01-04 13:57:26 +0000 (Sun, 04 Jan 2009) | 4 lines
isinf and isnan are macros, not functions; fix configure script
to use AC_CHECK_DECLS instead of AC_CHECK_FUNCS for these.
(See discussion in issue #4506)
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Also fix len() to return number of items rather than length in bytes.
I'm sorry it was not possible for me to work on this without reindenting
a bit some stuff around. The indentation in memoryobject.c is a mess,
I'll open a separate bug for it.
svn+ssh://pythondev@svn.python.org/python/trunk
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r67982 | benjamin.peterson | 2008-12-28 09:37:31 -0600 (Sun, 28 Dec 2008) | 1 line
fix WORD_BIGEDIAN declaration in Universal builds; fixes#4060 and #4728
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r67988 | ronald.oussoren | 2008-12-28 13:40:56 -0600 (Sun, 28 Dec 2008) | 1 line
Issue4064: architecture string for universal builds on OSX
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r67990 | ronald.oussoren | 2008-12-28 13:50:40 -0600 (Sun, 28 Dec 2008) | 3 lines
Update the fix for issue4064 to deal correctly with all three variants of
universal builds that are presented by the configure script.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r67028 | benjamin.peterson | 2008-10-25 18:27:07 -0500 (Sat, 25 Oct 2008) | 1 line
don't use a catch-all
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r67040 | armin.rigo | 2008-10-28 12:01:21 -0500 (Tue, 28 Oct 2008) | 5 lines
Fix one of the tests: it relied on being present in an "output test" in
order to actually test what it was supposed to test, i.e. that the code
in the __del__ method did not crash. Use instead the new helper
test_support.captured_output().
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r67044 | amaury.forgeotdarc | 2008-10-29 18:15:57 -0500 (Wed, 29 Oct 2008) | 3 lines
Correct error message in io.open():
closefd=True is the only accepted value with a file name.
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r67046 | thomas.heller | 2008-10-30 15:18:13 -0500 (Thu, 30 Oct 2008) | 2 lines
Fixed a modulefinder crash on certain relative imports.
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r67052 | christian.heimes | 2008-10-30 16:26:15 -0500 (Thu, 30 Oct 2008) | 1 line
Issue #4237: io.FileIO() was raising invalid warnings caused by insufficient initialization of PyFileIOObject struct members.
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r67065 | benjamin.peterson | 2008-10-30 18:59:18 -0500 (Thu, 30 Oct 2008) | 1 line
move unprefixed error into .c file
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r67070 | benjamin.peterson | 2008-10-31 15:41:44 -0500 (Fri, 31 Oct 2008) | 1 line
rephrase has_key doc
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r67077 | benjamin.peterson | 2008-11-03 09:14:51 -0600 (Mon, 03 Nov 2008) | 1 line
#4048 make the parser module accept relative imports as valid
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r67082 | hirokazu.yamamoto | 2008-11-03 12:03:06 -0600 (Mon, 03 Nov 2008) | 2 lines
Issue #3774: Fixed an error when create a Tkinter menu item without command
and then remove it. Written by Guilherme Polo (gpolo).
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The patch fixes several issues with Py_NewInterpreter as well as the demo for multiple subinterpreters.
Most of the patch was written by MvL with help from Benjamin, Amaury and me. Graham Dumpleton has verified that this patch fixes an issue with mod_wsgi.
could be easily encountered under Windows in debug mode when exercising
the recursion limit checking code, due to bogus handling of recursion
limit when USE_STACKCHEK was enabled.
Reviewed by Amaury Forgeot d'Arc on IRC.
exception afterwards (for a subsequent parameter), the user code will
not call PyBuffer_Release() and memory will leak.
Reviewed by Amaury Forgeot d'Arc.
Victor Stinner
Antoine Pitrou
Alexander Belopolsky
Benjamin Peterson
Mark Dickinson
Georg Brandl
Stefan Krah
Jeffrey Yasskin
Ronald Oussoren
Collin Winter
Barry Warsaw
Philip Jenvey
Gregory P. Smith
Amaury Forgeot d'Arc
Eric Smith
Skip Montanaro
Kristján Valur Jónsson
Alexandre Vassalotti
Martin v. Löwis
Hirokazu Yamamoto
Matthias Klose
Brett Cannon
Raymond Hettinger
Christian Heimes