void *dlopen(const char *filename, int flag)
{
bool lockAcquired = dmtcp::ThreadSync::libdlLockLock();
void *ret = _real_dlopen(filename, flag);
if (lockAcquired) {
dmtcp::ThreadSync::libdlLockUnlock();
}
return ret;
}
/*
* WARNING: By using this method to initialize libpthread wrappers (direct
* dlopen()/dlsym()) we are are overriding any user wrappers for these
* functions. If this is a problem in the future we need to think of a new way
* to do this.
*/
LIB_PRIVATE
void initialize_libpthread_wrappers()
{
if (!_libpthread_wrappers_initialized) {
dmtcp_setThreadPerformingDlopenDlsym();
void *pthread_handle = _real_dlopen(LIBPTHREAD_FILENAME, RTLD_NOW);
dmtcp_unsetThreadPerformingDlopenDlsym();
if (pthread_handle == NULL) {
fprintf(stderr, "*** DMTCP: Error: could not open libpthread shared "
"library. Aborting.\n");
abort();
}
FOREACH_LIBPTHREAD_WRAPPERS(GET_LIBPTHREAD_FUNC_ADDR);
_real_dlclose(pthread_handle);
_libpthread_wrappers_initialized = 1;
}
}
