Added checks for integer overflows, contributed by Google. Some are
only available if asserts are left in the code, in cases where they
can't be triggered from Python code.
- Bug #875692: Improve signal handling, especially when using threads, by
forcing an early re-execution of PyEval_EvalFrame() "periodic" code when
things_to_do is not cleared by Py_MakePendingCalls().
* using malloc() and free() directly, as explained in the new comment
* coding style in the PyGILState_*() functions
* the recent destroy-tstate-without-holding-the-GIL bug
* lock fixes and many more comments in thread.c
table' of the dll, to make sure that the dll really was build for the
correct Python version. It does this by looking for an entry
'pythonXY.dll' (X.Y is the Python version number).
The code now checks the size of the dll's import table before reading
entries from it. Before this patch, the code crashed trying to read
the import table when the size was zero (as in Win2k's wmi.dll, for
example).
Look for imports of 'pythonXY_d.dll' in a debug build instead of
'pythonXY.dll'.
Fixes SF 951851: Crash when reading "import table" of certain windows dlls.
comments about why both calls to cyclic gc here can cause problems.
Already fixed on the trunk. Since the calls were introduced in 2.3,
that's the end of it.
