[Python-Dev] Mixing memory management APIs

[Neal Norwitz]

Because of Michael Hudson's request, I tried running Purify 
--with-pymalloc enabled.  The results were a bit surprising: 13664 errors!

All the errors were in unicodeobject.c.  There were 3 types of errors:
Free Memory Reads, Array Bounds Reads, and Unitialized Memory Reads.
The line #s were in strange places (e.g., in a function declaration
and accessing self->length in an if clause, after it was accessed w/o error).
The line #s are primarily:  unicodeobject.c:2875, and unicodeobject.c:2214.

Has anyone run else used Purify and/or Insure --with-pymalloc?

BTW, I test_curses fails:  
	test test_curses crashed -- _curses.error: curs_set() returned ERR

Solaris 2.8, Purify 2002.

Neal
--
Problems (error lines begin with =>)

            PyUnicode_TranslateCharmap [unicodeobject.c:2214]
               
               PyObject *PyUnicode_EncodeASCII(const Py_UNICODE *p,
                                               int size,
            =>                                 const char *errors)
               {
                   PyObject *repr;
                   char *s, *start;

            split_char     [unicodeobject.c:2875]
                   if (end > self->length)
                       end = self->length;
                   if (end < 0)
            =>         end += self->length;
                   if (end < 0)
                       end = 0;