The following patch attempt to fix a memory leak happening when a
random class attribute is set. The internal instance dictionary is
created but never freed.
This fixes the problem for me, although I am not sure the patch
is correct.
<code>
p = MySWIGClass()
p.random_attribute = 0
</code>
Valgrind report:
==18267== 280 bytes in 1 blocks are definitely lost in loss record 1,372 of 1,780
==18267== at 0x4A0645D: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==18267== by 0x3A90A885DC: PyObject_Malloc (in /usr/lib64/libpython2.7.so.1.0)
==18267== by 0x3A90B101A8: _PyObject_GC_Malloc (in /usr/lib64/libpython2.7.so.1.0)
==18267== by 0x3A90B102AC: _PyObject_GC_New (in /usr/lib64/libpython2.7.so.1.0)
==18267== by 0x3A90A80943: PyDict_New (in /usr/lib64/libpython2.7.so.1.0)
==18267== by 0x3A90A6E8FC: PyFrame_New (in /usr/lib64/libpython2.7.so.1.0)
==18267== by 0x3A90AE1A65: PyEval_EvalCodeEx (in /usr/lib64/libpython2.7.so.1.0)
==18267== by 0x3A90AE088E: PyEval_EvalFrameEx (in /usr/lib64/libpython2.7.so.1.0)
==18267== by 0x3A90AE21DC: PyEval_EvalCodeEx (in /usr/lib64/libpython2.7.so.1.0)
==18267== by 0x3A90AE22E1: PyEval_EvalCode (in /usr/lib64/libpython2.7.so.1.0)
==18267== by 0x3A90AFB71E: ??? (in /usr/lib64/libpython2.7.so.1.0)
==18267== by 0x3A90AFC8DD: PyRun_FileExFlags (in /usr/lib64/libpython2.7.so.1.0)
==18267==
Attribute set within instance of a SWIG Python wrapped class are
stored in SwigPyObject->dict, which tp_dictoffset slot is pointing to.
However, SWIG wrapped classes did not have a __dict__ attribute.
Inheriting subclasses did not get the attribute either because the
SWIG wrapped classes initialize the tp_dictoffset slot:
From http://bugs.python.org/issue16272:
"If a type defines a nonzero tp_dictoffset, that type is responsible for
defining a `__dict__` slot as part of the tp_getset structures. Failure to
do so will result in the dict being inaccessible from Python via
`obj.__dict__` from instances of the type or subtypes."
Provide a SwigPyObject_get___dict__() function to retrieve the dict
attribute or create it when it does not exist yet (it is normally
created when setting attribute set), and a PyGetSetDef entry pointing
to this function.
* wsfulton-appveyor2:
Appveyor: partialcheck test-suite
Remove appveyor debugging code
Add CI testing for Windows using Appveyor
Python 2 and 3 testing on Windows
Detect Java on 64 bit windows
Allow for spaces in path to java include directory and executables
gcc and mno-cygwin tweaks on cygwin/mingw
preinst-swig script support for native windows paths
Add CSHARPOPTIONS for users to customise C# compiler flags
Portability fixes for python example
PY3 fixes for import_package example
Update AX_PATH_GENERIC for spaces support
Add support for Windows in AX_BOOST_BASE
CSharp test-suite support on windows
Java and Python time out when running just the test-suite.
Compromise for now... run just partialcheck-test-suite, ie
test just invoking SWIG and not C/C++compile and run tests.
Fix when the _CFLAGS and _LIBS are provided and they contain a space
For example:
./configure PCRE_LIBS='-L/home/me/pcre/lib -lpcre'
Serial number 13 in autoconf macro archive
