Hi,
We're trying to use OSG within a dynamically loaded plugin in our code.
Whenever we call dlclose() on our plugin, however, shortly after
main() returns we segfault. I was wondering if anyone who's worked with
OSG has heard of this kind of problem before?
I've attached an example of what we're doing which reproduces our
problem. We're running OSG 1.2.
--
Philip Lowman
Simulation Development Engineer, Modeling and Simulation Technology
General Dynamics Land Systems
http://www.gdls.com
#include <dlfcn.h>
#include <cassert>
#include <iostream>
typedef void (*cfunc)();
using namespace std;
int main(int argc, char *argv[])
{
char *error = 0;
void *handle = 0;
handle = dlopen("osgtest.so", RTLD_GLOBAL | RTLD_NOW);
error = dlerror();
if(error)
{
cout << "error calling dlopen()" << endl;
cout << error << endl;
return 1;
}
assert(handle);
dlerror();
cfunc entry = (cfunc) dlsym(handle, "initialize");
error = dlerror();
if(error)
{
cout << error << endl;
return 1;
}
assert(entry);
entry();
assert( dlclose(handle) == 0);
return 0;
}
default: main osgtest.so
main: main.cc
g++ -o $@ main.cc -ldl
osgtest.so : osgtest.o
g++ -shared -Wl,-soname,osgtest -o $@ osgtest.o -losg -losgDB
clean:
rm -f main
rm -f *.o
rm -f osgtest.so
#include <osg/Group>
#include <osg/Node>
#include <osgDB/ReadFile>
#include <cassert>
#include <iostream>
using namespace std;
extern "C" void initialize()
{
cout << "in initialize()" << endl;
osg::ref_ptr<osg::Group> group;
osg::ref_ptr<osg::Node> node;
node = osgDB::readNodeFile("cow.osg");
if(node.get())
{
group = node->asGroup();
assert(group.get());
cout << "Loaded the cow" << endl;
}
else
{
cout << "Unable to load cow.osg" << endl;
return;
}
}
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