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当把CPython植入 Java时,为什么会hang?
原标题：When embedding CPython in Java, why does this hang?

I m embe CPython into a JVM using Jepp,但当我跑时,

import numpy; numpy.finfo(float)

这一进程停滞不前。 gdb 说有些东西阻挡了ema光/锁的获取,而 st痕则表明与点有关的部分:

$ LD_PRELOAD=/usr/lib/libpython2.6.so gdb --args java -jar jepp.jar -i /tmp/go.py
GNU gdb (GDB) 7.1-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/java...(no debugging symbols found)...done.
(gdb) r
Starting program: /usr/bin/java -jar jepp.jar -i /tmp/go.py
[Thread debugging using libthread_db enabled]
process 20736 is executing new program: /usr/lib/jvm/java-6-sun-1.6.0.26/jre/bin/java
[Thread debugging using libthread_db enabled]
[New Thread 0x7ffff58fd700 (LWP 20739)]
[New Thread 0x7ffff16ca700 (LWP 20740)]
[New Thread 0x7ffff15c9700 (LWP 20741)]
[New Thread 0x7ffff14c8700 (LWP 20742)]
[New Thread 0x7ffff13c7700 (LWP 20743)]
[New Thread 0x7ffff0bf5700 (LWP 20744)]
[New Thread 0x7ffff0af4700 (LWP 20745)]
[New Thread 0x7ffff09f3700 (LWP 20746)]
[New Thread 0x7ffff08b3700 (LWP 20747)]
[New Thread 0x7ffff07b2700 (LWP 20748)]
[New Thread 0x7ffff06b1700 (LWP 20749)]
[New Thread 0x7ffff05b0700 (LWP 20750)]
[New Thread 0x7ffff04af700 (LWP 20751)]
>>> import numpy; numpy.finfo(float)
^C
Program received signal SIGINT, Interrupt.
0x00007ffff771703d in pthread_join () from /lib/libpthread.so.0
(gdb) bt
#0  0x00007ffff771703d in pthread_join () from /lib/libpthread.so.0
#1  0x000000004000591c in ContinueInNewThread ()
#2  0x0000000040001ef4 in main ()
(gdb) i threads
  14 Thread 0x7ffff04af700 (LWP 20751)  0x00007ffff771abc9 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  13 Thread 0x7ffff05b0700 (LWP 20750)  0x00007ffff771a85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  12 Thread 0x7ffff06b1700 (LWP 20749)  0x00007ffff771a85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  11 Thread 0x7ffff07b2700 (LWP 20748)  0x00007ffff771a85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  10 Thread 0x7ffff08b3700 (LWP 20747)  0x00007ffff771cb50 in sem_wait ()
   from /lib/libpthread.so.0
  9 Thread 0x7ffff09f3700 (LWP 20746)  0x00007ffff771a85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  8 Thread 0x7ffff0af4700 (LWP 20745)  0x00007ffff771a85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  7 Thread 0x7ffff0bf5700 (LWP 20744)  0x00007ffff771abc9 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  6 Thread 0x7ffff13c7700 (LWP 20743)  0x00007ffff771a85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  5 Thread 0x7ffff14c8700 (LWP 20742)  0x00007ffff771a85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  4 Thread 0x7ffff15c9700 (LWP 20741)  0x00007ffff771a85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  3 Thread 0x7ffff16ca700 (LWP 20740)  0x00007ffff771a85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  2 Thread 0x7ffff58fd700 (LWP 20739)  0x00007ffff771cb50 in sem_wait ()
   from /lib/libpthread.so.0
* 1 Thread 0x7ffff7ed8700 (LWP 20736)  0x00007ffff771703d in pthread_join ()
   from /lib/libpthread.so.0
(gdb) thread 2
[Switching to thread 2 (Thread 0x7ffff58fd700 (LWP 20739))]#0  0x00007ffff771cb50 in sem_wait () from /lib/libpthread.so.0
(gdb) bt
#0  0x00007ffff771cb50 in sem_wait () from /lib/libpthread.so.0
#1  0x00007ffff7a4db28 in PyThread_acquire_lock ()
   from /usr/lib/libpython2.6.so
#2  0x00007ffff7a1cbb4 in PyEval_RestoreThread () from /usr/lib/libpython2.6.so
#3  0x00007ffff7a41008 in PyGILState_Ensure () from /usr/lib/libpython2.6.so
#4  0x00007fffeb1e1ff6 in _error_handler (method=-334489136, errobj=0x80,
    errtype=0x0, retstatus=-1, first=0x0)
    at numpy/core/src/umath/ufunc_object.c:95
#5  0x00007fffeb1e2379 in PyUFunc_handlefperr (errmask=521,
    errobj=0x7fffec502950, retstatus=4, first=0x7ffff58fa5fc)
    at numpy/core/src/umath/ufunc_object.c:189
#6  0x00007fffeb1e7cd1 in PyUFunc_GenericFunction (self=<value optimized out>,
    args=<value optimized out>, kwds=<value optimized out>, op=0x7ffff58faaa0)
    at numpy/core/src/umath/ufunc_object.c:2734
#7  0x00007fffeb1e7ff0 in ufunc_generic_call (self=0x7fffec1df790,
    args=<value optimized out>, kwds=<value optimized out>)
    at numpy/core/src/umath/ufunc_object.c:4180
#8  0x00007ffff797c2e3 in PyObject_Call () from /usr/lib/libpython2.6.so
#9  0x00007ffff797ed9f in _PyObject_CallFunction_SizeT ()
   from /usr/lib/libpython2.6.so
#10 0x00007ffff797c9aa in ?? () from /usr/lib/libpython2.6.so
#11 0x00007ffff797d698 in PyNumber_Multiply () from /usr/lib/libpython2.6.so
#12 0x00007ffff7a1f2bc in PyEval_EvalFrameEx () from /usr/lib/libpython2.6.so
#13 0x00007ffff7a22928 in PyEval_EvalFrameEx () from /usr/lib/libpython2.6.so
#14 0x00007ffff7a23d60 in PyEval_EvalCodeEx () from /usr/lib/libpython2.6.so
#15 0x00007ffff79a9d60 in ?? () from /usr/lib/libpython2.6.so
#16 0x00007ffff797c2e3 in PyObject_Call () from /usr/lib/libpython2.6.so
#17 0x00007ffff798dcef in ?? () from /usr/lib/libpython2.6.so
#18 0x00007ffff797c2e3 in PyObject_Call () from /usr/lib/libpython2.6.so
#19 0x00007ffff79e2cd0 in ?? () from /usr/lib/libpython2.6.so
#20 0x00007ffff79d8f98 in ?? () from /usr/lib/libpython2.6.so
#21 0x00007ffff797c2e3 in PyObject_Call () from /usr/lib/libpython2.6.so
#22 0x00007ffff7a21771 in PyEval_EvalFrameEx () from /usr/lib/libpython2.6.so
#23 0x00007ffff7a23d60 in PyEval_EvalCodeEx () from /usr/lib/libpython2.6.so
#24 0x00007ffff7a220ab in PyEval_EvalFrameEx () from /usr/lib/libpython2.6.so
#25 0x00007ffff7a23d60 in PyEval_EvalCodeEx () from /usr/lib/libpython2.6.so
#26 0x00007ffff79a9d60 in ?? () from /usr/lib/libpython2.6.so
#27 0x00007ffff797c2e3 in PyObject_Call () from /usr/lib/libpython2.6.so
#28 0x00007ffff79d928d in ?? () from /usr/lib/libpython2.6.so
#29 0x00007ffff79d8f53 in ?? () from /usr/lib/libpython2.6.so
#30 0x00007ffff797c2e3 in PyObject_Call () from /usr/lib/libpython2.6.so
#31 0x00007ffff7a21771 in PyEval_EvalFrameEx () from /usr/lib/libpython2.6.so
#32 0x00007ffff7a23d60 in PyEval_EvalCodeEx () from /usr/lib/libpython2.6.so
#33 0x00007ffff7a23e32 in PyEval_EvalCode () from /usr/lib/libpython2.6.so
#34 0x00007ffff7a41d1c in PyRun_StringFlags () from /usr/lib/libpython2.6.so
#35 0x00007ffff019d1e7 in pyembed_eval (env=0x401121d0,
    _jepThread=140737154335376,
    str=0x7fffec117390 "import numpy; numpy.finfo(float)") at pyembed.c:929
#36 0x00007ffff019c29a in Java_jep_Jep_eval (env=0x401121d0,
---Type <return> to continue, or q <return> to quit---
    obj=<value optimized out>, tstate=140737154335376, jstr=0x7ffff58fbdf8)
    at jep.c:137
#37 0x00007ffff1a67d6e in ?? ()
#38 0x0000000000000000 in ?? ()
(gdb) thr 10
[Switching to thread 10 (Thread 0x7ffff08b3700 (LWP 20747))]#0  0x00007ffff771cb50 in sem_wait () from /lib/libpthread.so.0
(gdb) bt
#0  0x00007ffff771cb50 in sem_wait () from /lib/libpthread.so.0
#1  0x00007ffff600eea5 in check_pending_signals(bool) ()
   from /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/amd64/server/libjvm.so
#2  0x00007ffff600745c in signal_thread_entry(JavaThread*, Thread*) ()
   from /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/amd64/server/libjvm.so
#3  0x00007ffff61170f1 in JavaThread::run() ()
   from /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/amd64/server/libjvm.so
#4  0x00007ffff600eadf in java_start(Thread*) ()
   from /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/amd64/server/libjvm.so
#5  0x00007ffff77159ca in start_thread () from /lib/libpthread.so.0
#6  0x00007ffff726e70d in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()

从三角洲到浮游,看上去9次(可操作max_iterN=10000倍),然后在temp = z*t线上停止:

   for _ in xrange(max_iterN):
       y = z
       z = y*y
       a = z*one # Check here for underflow
       temp = z*t
       if any(a+a == zero) or any(abs(z)>=y):
           break
       temp1 = temp * betain
       if any(temp1*beta == z):
           break
       i = i + 1
       k = k + k
   else:
       print  baz 
       raise RuntimeError, msg % (_, one.dtype)

任何想法? 全面转载:

mkdir /tmp/test/

cd /tmp/test/

wget  http://sourceforge.net/projects/numpy/files/NumPy/1.6.1/numpy-1.6.1.tar.gz 

tar xzf numpy-1.6.1.tar.gz

cd numpy-1.6.1/

python setup.py install --prefix=/tmp/test/env

cd

git clone https://github.com/mrj0/jepp.git

cd jepp/jep/

export JAVA_HOME=/usr/lib/jvm/java-6-sun/

./configure --prefix=/tmp/jepp && make && make install

touch /tmp/go.py

PYTHONPATH=/tmp/test/env/lib/python2.6/site-packages/
LD_PRELOAD=/usr/lib/libpython2.6.so java -jar jepp.jar -i /tmp/go.py

>>> import numpy
>>> numpy.finfo(float)

我已能够在我机器上转录,这些机器是Utu x86_64箱。 当时的情况是,但国际红十字与红新月联会没有在乌班图尼普一揽子计划中经历过这种情况,只有按照上文的指示,从源头建造。

提前感谢。 这在我上了墙。

最佳回答

See this post by John Wright who go into the same problem:

基本上,宁静正在使用沙尔 a皮,其方式不符合吉普。 口译组利用口译人员,允许多种口译环境。 可以改变Jep,以便利用GIL的国家职能,但这实际上将限制Jep的运行。

时间：2011-10-03 04:20:13
问题回答

是否有特别理由可以使用Jython? 我的理解是,这在很大程度上是对实事的真正替代。

时间：2011-09-29 05:19:14

如果你有一只透镜进入CPython,其中一只透镜是“燃烧”,那么全球锁很可能被锁定,而CPython除了在释放这一锁闭之前就别无选择。

你们打上了什么read子——另外还有——在那些read子里做了什么?

时间：2011-09-29 07:32:32


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