[C++-sig] boost::python embedding error - runtime - Mac OS X - 1.38
Hi,
I am trying to run the following program:
#include
#include
#include
using namespace boost::python;
using namespace std;
int main(int argc, char** argv) {
{ // Using Python/C
Py_Initialize();
PyObject* main_module = PyImport_ImportModule("__main__");
PyObject* globals = PyEval_GetGlobals();
PyObject* locals = PyEval_GetLocals();
PyRun_SimpleString("print 'Hello World, from Python/C!'\n");
Py_Finalize();
}
{ // Using boost::python
Py_Initialize();
object main_module = import("__main__");
object main_namespace = main_module.attr("__dict__");
try {
object ignored = exec("print 'Hello World, from boost::python!'\n",
main_namespace);
Py_Finalize();
} catch (error_already_set const& e) {
PyErr_Print();
return 1;
}
}
return 0;
}
on Linux (both x86 and x86_64), with Ubuntu's default version of Boost
(1.34.1) installed, I am able to do so as expected:
$ ./embed
Hello World, from Python/C!
Hello World, from boost::python!
on Mac OS X, I get a runtime error:
$ ./embed
Hello World, from Python/C!
Bus Error
Running with gdb, this is the stack trace:
Hello World, from Python/C!
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x
0x in ?? ()
(gdb) where
#0 0x in ?? ()
#1 0x00bb618f in PyEval_GetGlobals ()
#2 0x00bce0dd in PyImport_Import ()
#3 0x00bce2b0 in PyImport_ImportModule ()
#4 0x008127d4 in boost::python::import (na...@0xb4a8) at
libs/python/src/import.cpp:20
#5 0x4446 in main (argc=1, argv=0xb510) at embed.cc:22
For this Mac, boost version is latest (1.38) and python version is:
Python 2.5.4 (r254:67917, Dec 23 2008, 14:57:27)
[GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin
Is this a bug? I attached the source and the cmake file I am using to
build, for convenience.
Thanks,
--Igor.
# require at least cmake 2.6
IF(COMMAND cmake_minimum_required)
CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
ENDIF(COMMAND cmake_minimum_required)
# the project is called OpenNERO
PROJECT(embed)
# find the Boost C++ libraries
SET(Boost_ADDITIONAL_VERSIONS 1.37 1.37.0 1.38 1.38.0)
FIND_PACKAGE (Boost COMPONENTS python filesystem serialization system date_time)
IF (${Boost_MINOR_VERSION} LESS 35)
FIND_PACKAGE (Boost COMPONENTS python filesystem serialization date_time)
ENDIF (${Boost_MINOR_VERSION} LESS 35)
IF (Boost_FOUND)
MESSAGE(STATUS "Found boost libraries in ${Boost_INCLUDE_DIR} as
${Boost_LIBRARIES}")
ELSE (Boost_FOUND)
MESSAGE(FATAL_ERROR "Boost libraries were not found")
ENDIF (Boost_FOUND)
# Find the Python libraries
FIND_PACKAGE ( PythonLibs )
IF (NOT PYTHON_FOUND AND PYTHON_LIBRARIES)
SET(PYTHON_FOUND "YES")
ELSE (NOT PYTHON_FOUND AND PYTHON_LIBRARIES)
SET(PYTHON_FOUND "NO")
ENDIF(NOT PYTHON_FOUND AND PYTHON_LIBRARIES)
IF (PYTHON_FOUND)
MESSAGE(STATUS "Found Python libraries in ${PYTHON_INCLUDE_PATH} as
${PYTHON_LIBRARIES}")
ELSE (PYTHON_FOUND)
MESSAGE(FATAL_ERROR "Python libraries not found")
ENDIF (PYTHON_FOUND)
INCLUDE_DIRECTORIES ( ${Boost_INCLUDE_DIR} )
INCLUDE_DIRECTORIES ( ${PYTHON_INCLUDE_PATH} )
ADD_EXECUTABLE(embed embed.cc)
TARGET_LINK_LIBRARIES (embed ${PYTHON_LIBRARIES})
TARGET_LINK_LIBRARIES (embed ${Boost_LIBRARIES})
embed.cc
Description: Binary data
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Re: [C++-sig] boost::python embedding error - runtime - Mac OS X - 1.38
BTW, this seems specific to 1.38.0 version of Boost - I just
downgraded to 1.34.1 on the same mac, and got the expected "Hello
World from boost::python!".
--Igor.
On Thu, Mar 5, 2009 at 12:47 PM, Igor Karpov wrote:
> Hi,
>
> I am trying to run the following program:
>
> #include
> #include
>
> #include
> using namespace boost::python;
>
> using namespace std;
>
> int main(int argc, char** argv) {
>
> { // Using Python/C
> Py_Initialize();
> PyObject* main_module = PyImport_ImportModule("__main__");
> PyObject* globals = PyEval_GetGlobals();
> PyObject* locals = PyEval_GetLocals();
> PyRun_SimpleString("print 'Hello World, from Python/C!'\n");
> Py_Finalize();
> }
>
> { // Using boost::python
> Py_Initialize();
> object main_module = import("__main__");
> object main_namespace = main_module.attr("__dict__");
> try {
> object ignored = exec("print 'Hello World, from boost::python!'\n",
> main_namespace);
> Py_Finalize();
> } catch (error_already_set const& e) {
> PyErr_Print();
> return 1;
> }
> }
>
> return 0;
> }
>
> on Linux (both x86 and x86_64), with Ubuntu's default version of Boost
> (1.34.1) installed, I am able to do so as expected:
>
> $ ./embed
> Hello World, from Python/C!
> Hello World, from boost::python!
>
> on Mac OS X, I get a runtime error:
> $ ./embed
> Hello World, from Python/C!
> Bus Error
>
> Running with gdb, this is the stack trace:
>
> Hello World, from Python/C!
>
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_PROTECTION_FAILURE at address: 0x
> 0x in ?? ()
> (gdb) where
> #0 0x in ?? ()
> #1 0x00bb618f in PyEval_GetGlobals ()
> #2 0x00bce0dd in PyImport_Import ()
> #3 0x00bce2b0 in PyImport_ImportModule ()
> #4 0x008127d4 in boost::python::import (na...@0xb4a8) at
> libs/python/src/import.cpp:20
> #5 0x4446 in main (argc=1, argv=0xb510) at embed.cc:22
>
> For this Mac, boost version is latest (1.38) and python version is:
>
> Python 2.5.4 (r254:67917, Dec 23 2008, 14:57:27)
> [GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin
>
> Is this a bug? I attached the source and the cmake file I am using to
> build, for convenience.
>
> Thanks,
>
> --Igor.
>
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Re: [C++-sig] boost::python embedding error - runtime - Mac OS X - 1.38
>Py_Finalize(); Boost.Python doesn't support Py_Finalize(). Could you try again without? It is a long-standing known issue, e.g. http://mail.python.org/pipermail/cplusplus-sig/2005-November/009543.html ___ Cplusplus-sig mailing list Cplusplus-sig@python.org http://mail.python.org/mailman/listinfo/cplusplus-sig
Re: [C++-sig] boost::python embedding error - runtime - Mac OS X - 1.38
Well, the version with Py_Finalize() runs on the same machine with
1.34.1, so I don't think that's the problem. However, paring down the
code to:
#include
#include
using namespace boost::python;
int main(int argc, char** argv) {
{ // Using boost::python
Py_Initialize();
object main_module = import("__main__");
object main_namespace = main_module.attr("__dict__");
try {
object ignored = exec("print 'Hello World, from boost::python!'\n",
main_namespace);
} catch (error_already_set const& e) {
PyErr_Print();
return 1;
}
}
return 0;
}
Will re-create the same Bus error at runtime...
--Igor.
On Thu, Mar 5, 2009 at 3:26 PM, Ralf W. Grosse-Kunstleve wrote:
>
>> Py_Finalize();
>
>
> Boost.Python doesn't support Py_Finalize(). Could you try again without?
> It is a long-standing known issue, e.g.
> http://mail.python.org/pipermail/cplusplus-sig/2005-November/009543.html
>
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Re: [C++-sig] boost::python embedding error - runtime - Mac OS X - 1.38
Sorry I cannot help any further; I've never used embedding myself. I hope
someone
else will step in.
For the archives:
http://www.boost.org/doc/libs/1_38_0/libs/python/todo.html#pyfinalize-safety
I believe you're just getting lucky if Py_Finalize() doesn't crash the process.
- Original Message
From: Igor Karpov
To: Ralf W. Grosse-Kunstleve
Cc: Development of Python/C++ integration
Sent: Thursday, March 5, 2009 1:46:26 PM
Subject: Re: [C++-sig] boost::python embedding error - runtime - Mac OS X -
1.38
Well, the version with Py_Finalize() runs on the same machine with
1.34.1, so I don't think that's the problem. However, paring down the
code to:
#include
#include
using namespace boost::python;
int main(int argc, char** argv) {
{ // Using boost::python
Py_Initialize();
object main_module = import("__main__");
object main_namespace = main_module.attr("__dict__");
try {
object ignored = exec("print 'Hello World, from boost::python!'\n",
main_namespace);
} catch (error_already_set const& e) {
PyErr_Print();
return 1;
}
}
return 0;
}
Will re-create the same Bus error at runtime...
--Igor.
On Thu, Mar 5, 2009 at 3:26 PM, Ralf W. Grosse-Kunstleve wrote:
>
>>Py_Finalize();
>
>
> Boost.Python doesn't support Py_Finalize(). Could you try again without?
> It is a long-standing known issue, e.g.
> http://mail.python.org/pipermail/cplusplus-sig/2005-November/009543.html
>
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