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/*-
* Copyright (c) 2014-2020 MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
#include "wt_internal.h"
/*
* __wt_dlopen --
* Open a dynamic library.
*/
int
__wt_dlopen(WT_SESSION_IMPL *session, const char *path, WT_DLH **dlhp)
{
WT_DECL_RET;
WT_DLH *dlh;
WT_RET(__wt_calloc_one(session, &dlh));
WT_ERR(__wt_strdup(session, path == NULL ? "local" : path, &dlh->name));
if ((dlh->handle = dlopen(path, RTLD_LAZY)) == NULL)
WT_ERR_MSG(session, __wt_errno(), "dlopen(%s): %s", path, dlerror());
*dlhp = dlh;
if (0) {
err:
__wt_free(session, dlh->name);
__wt_free(session, dlh);
}
return (ret);
}
/*
* __wt_dlsym --
* Lookup a symbol in a dynamic library.
*/
int
__wt_dlsym(WT_SESSION_IMPL *session, WT_DLH *dlh, const char *name, bool fail, void *sym_ret)
{
void *sym;
*(void **)sym_ret = NULL;
if ((sym = dlsym(dlh->handle, name)) == NULL) {
if (fail)
WT_RET_MSG(session, __wt_errno(), "dlsym(%s in %s): %s", name, dlh->name, dlerror());
return (0);
}
*(void **)sym_ret = sym;
return (0);
}
/*
* __wt_dlclose --
* Close a dynamic library
*/
int
__wt_dlclose(WT_SESSION_IMPL *session, WT_DLH *dlh)
{
WT_DECL_RET;
/*
* FreeBSD dies inside __cxa_finalize when closing handles.
*
* For now, just skip the dlclose: this may leak some resources until the process exits, but that is
* preferable to hard-to-debug crashes during exit.
*/
#ifndef __FreeBSD__
if (dlclose(dlh->handle) != 0) {
ret = __wt_errno();
__wt_err(session, ret, "dlclose: %s", dlerror());
}
#endif
__wt_free(session, dlh->name);
__wt_free(session, dlh);
return (ret);
}
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