[Python-bugs-list] [ python-Bugs-727241 ] Core Dumps : Python2.2.2
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Fri, 25 Apr 2003 12:03:48 -0700
Bugs item #727241, was opened at 2003-04-25 00:16
Message generated for change (Comment added) made by loewis
You can respond by visiting:
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Category: None
Group: Python 2.2.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Eli Rosenberg (elirosenberg)
Assigned to: Nobody/Anonymous (nobody)
Summary: Core Dumps : Python2.2.2
Initial Comment:
Hello,
I am able to cause python to core dump on IRIX
6.5.18 and above with the code listed below. I have
compiled with 3 versions of gcc as well as MIPSpro.
Running this code with a valid host and a port
that will cause a connection refused socket error
produces a core dump with the the stack trace below.
>>> import socket
>>> x=socket.socket()
>>> x.connect(('www.google.com', 1234))
> 0 realfree(0x10162e98, 0x0, 0x200000, 0x65637469,
0x17dd4, 0x1, 0x1, 0x8)
["/xlv47/6.5.18f/work/irix/lib/libc/libc_n32_M4/gen/malloc.c":527,
0xfb245fc]
1 cleanfree(0x0, 0x0, 0x200000, 0x65637469, 0x17dd4,
0x1, 0x1, 0x8)
["/xlv47/6.5.18f/work/irix/lib/libc/libc_n32_M4/gen/malloc.c":945,
0xfb24e44]
2 __malloc(0x28, 0x0, 0x200000, 0x65637469, 0x17dd4,
0x1, 0x1, 0x8)
["/xlv47/6.5.18f/work/irix/lib/libc/libc_n32_M4/gen/malloc.c":230,
0xfb24078]
3 _malloc(0x28, 0x0, 0x200000, 0x65637469, 0x17dd4,
0x1, 0x1, 0x8)
["/xlv47/6.5.18f/work/irix/lib/libc/libc_n32_M4/gen/malloc.c":186,
0xfb23ee4]
4 _PyObject_GC_Malloc(tp = 0x1013fbe0, nitems = 0)
["/usr/people/eli/Python-2.2.2/Modules/gcmodule.c":868,
0x10092244]
5 _PyObject_GC_New(tp = 0x1013fbe0)
["/usr/people/eli/Python-2.2.2/Modules/gcmodule.c":895,
0x10092368]
6 newtracebackobject(next = (nil), frame =
0x1016b670, lasti = 21, lineno = 1)
["/usr/people/eli/Python-2.2.2/Python/traceback.c":115,
0x100c6684]
7 PyTraceBack_Here(frame = 0x1016b670)
["/usr/people/eli/Python-2.2.2/Python/traceback.c":133,
0x100c67f4]
8 eval_frame(f = 0x1016b670)
["/usr/people/eli/Python-2.2.2/Python/ceval.c":2238,
0x1004e894]
9 PyEval_EvalCodeEx(co = 0x1016e990, globals =
0x1016a5d0, locals = 0x1016a5d0, args = (nil), argcount
= 0, kws = (nil), kwcount = 0, defs = (nil), defcount =
0, closure = (nil))
["/usr/people/eli/Python-2.2.2/Python/ceval.c":2595,
0x1004ffe0
10 PyEval_EvalCode(co = 0x1016e990, globals =
0x1016a5d0, locals = 0x1016a5d0)
["/usr/people/eli/Python-2.2.2/Python/ceval.c":481,
0x10047ea0]
11 run_node(n = 0x101a5b28, filename = 0x1014e978 =
"<stdin>", globals = 0x1016a5d0, locals = 0x1016a5d0,
flags = 0x7fff2e2c)
["/usr/people/eli/Python-2.2.2/Python/pythonrun.c":1079,
0x1006f380]
12 PyRun_InteractiveOneFlags(fp = 0xfb53680,
filename = 0x1014e978 = "<stdin>", flags = 0x7fff2e2c)
["/usr/people/eli/Python-2.2.2/Python/pythonrun.c":590,
0x1006d57c]
13 PyRun_InteractiveLoopFlags(fp = 0xfb53680,
filename = 0x1014e978 = "<stdin>", flags = 0x7fff2e2c)
["/usr/people/eli/Python-2.2.2/Python/pythonrun.c":526,
0x1006d198]
14 PyRun_AnyFileExFlags(fp = 0xfb53680, filename =
0x1014e978 = "<stdin>", closeit = 0, flags =
0x7fff2e2c)
["/usr/people/eli/Python-2.2.2/Python/pythonrun.c":489,
0x1006cf48]
15 Py_Main(argc = 1, argv = 0x7fff2f24)
["/usr/people/eli/Python-2.2.2/Modules/main.c":364,
0x1000fa44]
16 main(argc = 1, argv = 0x7fff2f24)
["/usr/people/eli/Python-2.2.2/Modules/python.c":10,
0x1000ecdc]
17 __start()
["/xlv55/kudzu-apr12/work/irix/lib/libc/libc_n32_M4/csu/crt1text.s":177,
0x1000ec78]
I compiled Python 64-bit and the code above appears
not to cause a segfault but the code below will
bus error after a few iterations.
import socket
import time
def doit():
s = socket.socket()
start = time.time()
try:
s.connect(('www.cnn.com', 80))
except socket.error,e:
print repr(e),str(e)
finish = time.time()
time.sleep(.5)
print str(finish-start),"\n"
s.close()
for x in xrange(10):
doit()
Here is the stack trace:
> 0 realfree(0x10162e98, 0x0, 0x200000, 0x65637469,
0x17dd4, 0x1, 0x1, 0x8)
["/xlv47/6.5.18f/work/irix/lib/libc/libc_n32_M4/gen/malloc.c":527,
0xfb245fc]
1 cleanfree(0x0, 0x0, 0x200000, 0x65637469, 0x17dd4,
0x1, 0x1, 0x8)
["/xlv47/6.5.18f/work/irix/lib/libc/libc_n32_M4/gen/malloc.c":945,
0xfb24e44]
2 __malloc(0x28, 0x0, 0x200000, 0x65637469, 0x17dd4,
0x1, 0x1, 0x8)
["/xlv47/6.5.18f/work/irix/lib/libc/libc_n32_M4/gen/malloc.c":230,
0xfb24078]
3 _malloc(0x28, 0x0, 0x200000, 0x65637469, 0x17dd4,
0x1, 0x1, 0x8)
["/xlv47/6.5.18f/work/irix/lib/libc/libc_n32_M4/gen/malloc.c":186,
0xfb23ee4]
4 _PyObject_GC_Malloc(tp = 0x1013fbe0, nitems = 0)
["/usr/people/eli/Python-2.2.2/Modules/gcmodule.c":868,
0x10092244]
5 _PyObject_GC_New(tp = 0x1013fbe0)
["/usr/people/eli/Python-2.2.2/Modules/gcmodule.c":895,
0x10092368]
6 newtracebackobject(next = (nil), frame =
0x1016b670, lasti = 21, lineno = 1)
["/usr/people/eli/Python-2.2.2/Python/traceback.c":115,
0x100c6684]
7 PyTraceBack_Here(frame = 0x1016b670)
["/usr/people/eli/Python-2.2.2/Python/traceback.c":133,
0x100c67f4]
8 eval_frame(f = 0x1016b670)
["/usr/people/eli/Python-2.2.2/Python/ceval.c":2238,
0x1004e894]
9 PyEval_EvalCodeEx(co = 0x1016e990, globals =
0x1016a5d0, locals = 0x1016a5d0, args = (nil), argcount
= 0, kws = (nil), kwcount = 0, defs = (nil), defcount =
0, closure = (nil))
["/usr/people/eli/Python-2.2.2/Python/ceval.c":2595,
0x1004ffe0
10 PyEval_EvalCode(co = 0x1016e990, globals =
0x1016a5d0, locals = 0x1016a5d0)
["/usr/people/eli/Python-2.2.2/Python/ceval.c":481,
0x10047ea0]
11 run_node(n = 0x101a5b28, filename = 0x1014e978 =
"<stdin>", globals = 0x1016a5d0, locals = 0x1016a5d0,
flags = 0x7fff2e2c)
["/usr/people/eli/Python-2.2.2/Python/pythonrun.c":1079,
0x1006f380]
12 PyRun_InteractiveOneFlags(fp = 0xfb53680,
filename = 0x1014e978 = "<stdin>", flags = 0x7fff2e2c)
["/usr/people/eli/Python-2.2.2/Python/pythonrun.c":590,
0x1006d57c]
13 PyRun_InteractiveLoopFlags(fp = 0xfb53680,
filename = 0x1014e978 = "<stdin>", flags = 0x7fff2e2c)
["/usr/people/eli/Python-2.2.2/Python/pythonrun.c":526,
0x1006d198]
14 PyRun_AnyFileExFlags(fp = 0xfb53680, filename =
0x1014e978 = "<stdin>", closeit = 0, flags =
0x7fff2e2c)
["/usr/people/eli/Python-2.2.2/Python/pythonrun.c":489,
0x1006cf48]
15 Py_Main(argc = 1, argv = 0x7fff2f24)
["/usr/people/eli/Python-2.2.2/Modules/main.c":364,
0x1000fa44]
16 main(argc = 1, argv = 0x7fff2f24)
["/usr/people/eli/Python-2.2.2/Modules/python.c":10,
0x1000ecdc]
17 __start()
["/xlv55/kudzu-apr12/work/irix/lib/libc/libc_n32_M4/csu/crt1text.s":177,
0x1000ec78]
Any help would be appreciated. thanks.
-Eli
----------------------------------------------------------------------
>Comment By: Martin v. Löwis (loewis)
Date: 2003-04-25 21:03
Message:
Logged In: YES
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No. Except for MacOS, there is are no port maintainers.
There are experts for some of the Unices, but only for Linux
and Solaris. For things as strange as Irix, we have to have
actual users of the systems to fully understand the problem
and provide patches.
In general, we accept work-arounds only if it can be shown
that a work-around is necessary around a true platform bug
(see how the getaddrinfo emulation is used on OSX, even
though the platform provides a native implementation).
I'm pretty certain that Python's usage of the getaddrinfo API
is correct. If this is still causing crashes, it may be that the
implementation in the Irix library is buggy. Have you applied
all vendor patches?
----------------------------------------------------------------------
Comment By: Eli Rosenberg (elirosenberg)
Date: 2003-04-25 20:28
Message:
Logged In: YES
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Hmm, I don't know for sure, but closing might not be
the best idea because anyone else building on a
really recent IRIX will have problems with socketmodule.
Is there an IRIX maintainer or somebody like that?
----------------------------------------------------------------------
Comment By: Michael Hudson (mwh)
Date: 2003-04-25 20:06
Message:
Logged In: YES
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so... do you think the fault is with Python or IRIX?
if you're happy enough with the situation as it stands, we may as well close
this...
----------------------------------------------------------------------
Comment By: Eli Rosenberg (elirosenberg)
Date: 2003-04-25 19:41
Message:
Logged In: YES
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Hi, I think I have fixed things...for now. Here is what I see:
IRIX now includes POSIX 1003.1g draft implementations
of getaddrinfo/getnameinfo in accordance with
http://www.ietf.org/proceedings/01mar/I-D/ipngwg-rfc2553bis-03.txt
Previously, netdb.h on IRIX did not have these definitions and
Python compiled in its own implementations and things seemed
to work.
I changed pyconfig.h to have socketmodule use its own
implementations, but I did have to make a few changes
because the IRIX prototypes for these functions are
for the 2001 version of the standards, whereas socketmodule
seemed to have 1999 versions from RFC2553.
Not knowing much about the Python C API, I did not
look closely enough to see why socketmodule
seems to cause memory faults when compiled with
the IRIX libc versions of these functions.
Hopefully this is the source of the problem.
-eli
----------------------------------------------------------------------
Comment By: Michael Hudson (mwh)
Date: 2003-04-25 12:53
Message:
Logged In: YES
user_id=6656
This looks nasty...
Could you try making a debug build of Python (pass
--with-pydebug to ./configure) and/or try with current CVS?
----------------------------------------------------------------------
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=727241&group_id=5470