[Python-bugs-list] [ python-Bugs-606495 ] malloc called directly

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Bugs item #606495, was opened at 2002-09-08 17:55
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Category: None
Group: Python 2.2.1
Status: Open
Resolution: None
Priority: 5
Submitted By: Steven Ellmore (stevenellmore)
Assigned to: Nobody/Anonymous (nobody)
Summary: malloc called directly

Initial Comment:
At least the following files use malloc directly instead of 
PyCore_MALLOC_FUNC (defined in pymem.h):

_sre.c
classobject.c
compile.c

There are many others too, but I'm working from a 
stripped down codebase.

The Mac version is the worst offender.


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>Comment By: Steven Ellmore (stevenellmore)
Date: 2002-09-08 19:00

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It's a bug because it should be possible to embed Python in 
an application that does its own memory management and 
have Python play nice with it.

In this scenario, the ONLY thing that should be calling malloc 
directly is the memory manager.  Everything else should 
route through the memory manager so that application 
specific heap management can take place.

At the embedded system scale (think: no virtual memory), 
the typical operation of a custom memory manager is to 
malloc all of memory, which means that any subsequent 
rogue calls to malloc will fail.


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Comment By: Tim Peters (tim_one)
Date: 2002-09-08 18:55

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Why do you think this is a bug?  There's no rule against 
calling malloc(), other than if you do, you must call free() 
instead of one of the PyMem or PyObject free functions.

Note that PyCore_MALLOC_FUNC doesn't exist in the 
current CVS source -- we purged a lot of unused complexity 
in those macro layers for 2.3.

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Comment By: Steven Ellmore (stevenellmore)
Date: 2002-09-08 18:27

Message:
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Followup:
Oops...I think the correct solution is to have them use 
PyMem_MALLOC and NOT PyCore_MALLOC_FUNC.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=606495&group_id=5470