[issue17970] Mutlithread XML parsing cause segfault

2021-09-07 Thread Irit Katriel 


Irit Katriel  added the comment:

I've reproduced the segfault on 3.11.

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nosy: +iritkatriel
versions: +Python 3.10, Python 3.11, Python 3.9 -Python 2.7, Python 3.3, Python 
3.4

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[issue17970] Mutlithread XML parsing cause segfault

2013-08-15 Thread Antoine Pitrou 

Changes by Antoine Pitrou :


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type:  -> crash

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[issue17970] Mutlithread XML parsing cause segfault

2013-05-18 Thread Antoine Pitrou 

Antoine Pitrou added the comment:

I agree with Amaury, multi-threaded parsing should definitely not crash. Adding 
a lock should be quite easy. I wonder what would be the effect on performance, 
if there are lots of backs and forths between expat and Python.

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nosy: +pitrou

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[issue17970] Mutlithread XML parsing cause segfault

2013-05-14 Thread Amaury Forgeot d'Arc 

Amaury Forgeot d'Arc added the comment:

In my opinion it's not fine to let Python crash.
The implementation could be similar to the one in bufferedio.c, it's quite 
lightweight.

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[issue17970] Mutlithread XML parsing cause segfault

2013-05-14 Thread Christian Heimes 

Christian Heimes added the comment:

In my opinion it's fine to document Python's XML parser as not thread-safe and 
leave locking to the user. Any fancy locking or tracking is going to make it 
slower for users. Any it takes a lot of effort to implement the feature, too. 
lxml offers a faster XML parser with multi-threading support.

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nosy: +christian.heimes

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[issue17970] Mutlithread XML parsing cause segfault

2013-05-13 Thread Antoine Pitrou 

Changes by Antoine Pitrou :


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versions: +Python 3.3, Python 3.4

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[issue17970] Mutlithread XML parsing cause segfault

2013-05-13 Thread Amaury Forgeot d'Arc 

Amaury Forgeot d'Arc added the comment:

But this would break working code which already uses locks correctly (or some 
kind of pool of cached parsers)

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[issue17970] Mutlithread XML parsing cause segfault

2013-05-13 Thread Alex Gaynor 

Alex Gaynor added the comment:

It could also track tids and raise an error if you attempt to use it from 
multiple threads.

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nosy: +alex

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[issue17970] Mutlithread XML parsing cause segfault

2013-05-13 Thread Amaury Forgeot d'Arc 

Amaury Forgeot d'Arc added the comment:

Expat is not thread-safe at the object level, a single Parser cannot be used 
from multiple threads.
Pyexpat could add locks to Parser objects.

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nosy: +amaury.forgeotdarc
stage:  -> needs patch

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[issue17970] Mutlithread XML parsing cause segfault

2013-05-13 Thread mrDoctorWho0 . 

New submission from mrDoctorWho0 .:

Linux i386, Python 2.7.4. Multithread xml parsing via pyexpat cause 
segmentation fault

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components: XML
files: pyexpat_crash_multithread.py
messages: 189131
nosy: mrDoctorWho0..
priority: normal
severity: normal
status: open
title: Mutlithread XML parsing cause segfault
versions: Python 2.7
Added file: http://bugs.python.org/file30250/pyexpat_crash_multithread.py

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