Narrowing the problem: it isn't any of the Mir code, or the generated
code, or explicit calls into libprotobuf-lite.
The following program loads and unloads libprotobuf-lite.so from 2.6.1
successfully. With 3.0.0 it fails to unload.
#include <stdio.h>
#include <dlfcn.h>
int main(int argc, char** argv)
{
char const* libname = argc <= 1 ? "libprotobuf-lite.so" : argv[1];
void* dl = NULL;
dl = dlopen(libname, RTLD_NOW);
if (!dl)
{
printf("dlopen() error: (%s)\n", dlerror());
return 1;
}
printf("library loaded\n");
dlclose(dl);
dl = dlopen(libname, RTLD_NOW|RTLD_NOLOAD);
if (dl)
{
printf("library didn't unload: (%s)\n", libname);
dlclose(dl);
return 1;
}
printf("library unloaded\n");
return 0;
}
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https://bugs.launchpad.net/bugs/1619616
Title:
Mir test fails with protobuf3: Protobuf-can-be-reloaded (SEGFAULT)
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