* Expose a canary symbol of the previous ABI to ensure we catch uses of a
* liblttng-ust.so.0 dlopen'd after .so.1 has been loaded. Use a different
* symbol than the detection code to ensure we don't detect ourself.
+ *
+ * This scheme will only work on systems where the global symbol table has
+ * priority when resolving the symbols of a dlopened shared object, which is
+ * the case on Linux but not on FreeBSD.
*/
void init_usterr(void);
void init_usterr(void)
* this library so it never becomes zero, thus never gets unloaded from the
* address space of the process. Since we are already running in the
* constructor of the LTTNG_UST_LIB_SONAME library, calling dlopen will
- * simply increment the refcount and no additionnal work is needed by the
+ * simply increment the refcount and no additional work is needed by the
* dynamic loader as the shared library is already loaded in the address
* space. As a safe guard, we use the RTLD_NODELETE flag to prevent
* unloading of the UST library if its refcount becomes zero (which should
return;
DBG("process %d", getpid());
lttng_ust_urcu_after_fork_parent();
- /* Release mutexes and reenable signals */
+ /* Release mutexes and re-enable signals */
ust_after_fork_common(restore_sigset);
}
/* Release urcu mutexes */
lttng_ust_urcu_after_fork_child();
lttng_ust_cleanup(0);
- /* Release mutexes and reenable signals */
+ /* Release mutexes and re-enable signals */
ust_after_fork_common(restore_sigset);
lttng_ust_ctor();
}