2009-05-15 Paul Pluzhnikov <ppluzhnikov@google.com>

2009-05-15  Paul Pluzhnikov  <ppluzhnikov@google.com>

	* NEWS: Mention set/show libthread-db-search-path.
	* gdb_thread_db.h (LIBTHREAD_DB_SEARCH_PATH): New define.
	(LIBTHREAD_DB_SO): Moved from linux-thread-db.c
	* linux-thread-db.c (libthread_db_search_path): New setting.
	(thread_db_handle): New variable (replaces using_thread_db).
	(try_thread_db_load_1): New function.
	(try_thread_db_load, thread_db_load_search): Likewise.
	(dladdr_to_soname): Likewise.
	(thread_db_load): Iterate over possibly multiple libthread_db's.
	(check_for_thread_db): Attempt to load new libthread_db.
	(thread_db_detach, thread_db_wait): Unload libthread_db.
	(thread_db_mourn_inferior): Likewise.
	(_initialize_thread_db): Add new libthread-db-search-path option.
	Defer loading of libthread_db to check_for_thread_db.
	* solib.c (libpthread_name_p): New function.
	(libpthread_solib_p): Call it.
	* solib.h (libpthread_name_p): New prototype.