diff options
Diffstat (limited to 'elf/dl-open.c')
| -rw-r--r-- | elf/dl-open.c | 64 |
1 files changed, 39 insertions, 25 deletions
diff --git a/elf/dl-open.c b/elf/dl-open.c index cf8e8cc..8d90b56 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -1,5 +1,5 @@ /* Load a shared object at runtime, relocate it, and run its initializer. - Copyright (C) 1996-2007, 2009, 2010 Free Software Foundation, Inc. + Copyright (C) 1996-2007, 2009, 2010, 2011 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -347,6 +347,7 @@ dl_open_worker (void *a) /* If the file is not loaded now as a dependency, add the search list of the newly loaded object to the scope. */ bool any_tls = false; + unsigned int first_static_tls = new->l_searchlist.r_nlist; for (unsigned int i = 0; i < new->l_searchlist.r_nlist; ++i) { struct link_map *imap = new->l_searchlist.r_list[i]; @@ -425,30 +426,9 @@ dl_open_worker (void *a) might have to increase its size. */ _dl_add_to_slotinfo (imap); - if (imap->l_need_tls_init) - { - /* For static TLS we have to allocate the memory here - and now. This includes allocating memory in the DTV. - But we cannot change any DTV other than our own. So, - if we cannot guarantee that there is room in the DTV - we don't even try it and fail the load. - - XXX We could track the minimum DTV slots allocated in - all threads. */ - if (! RTLD_SINGLE_THREAD_P && imap->l_tls_modid > DTV_SURPLUS) - _dl_signal_error (0, "dlopen", NULL, N_("\ -cannot load any more object with static TLS")); - - imap->l_need_tls_init = 0; -#ifdef SHARED - /* Update the slot information data for at least the - generation of the DSO we are allocating data for. */ - _dl_update_slotinfo (imap->l_tls_modid); -#endif - - GL(dl_init_static_tls) (imap); - assert (imap->l_need_tls_init == 0); - } + if (imap->l_need_tls_init + && first_static_tls == new->l_searchlist.r_nlist) + first_static_tls = i; /* We have to bump the generation counter. */ any_tls = true; @@ -460,6 +440,40 @@ cannot load any more object with static TLS")); _dl_fatal_printf (N_("\ TLS generation counter wrapped! Please report this.")); + /* We need a second pass for static tls data, because _dl_update_slotinfo + must not be run while calls to _dl_add_to_slotinfo are still pending. */ + for (unsigned int i = first_static_tls; i < new->l_searchlist.r_nlist; ++i) + { + struct link_map *imap = new->l_searchlist.r_list[i]; + + if (imap->l_need_tls_init + && ! imap->l_init_called + && imap->l_tls_blocksize > 0) + { + /* For static TLS we have to allocate the memory here and + now. This includes allocating memory in the DTV. But we + cannot change any DTV other than our own. So, if we + cannot guarantee that there is room in the DTV we don't + even try it and fail the load. + + XXX We could track the minimum DTV slots allocated in + all threads. */ + if (! RTLD_SINGLE_THREAD_P && imap->l_tls_modid > DTV_SURPLUS) + _dl_signal_error (0, "dlopen", NULL, N_("\ +cannot load any more object with static TLS")); + + imap->l_need_tls_init = 0; +#ifdef SHARED + /* Update the slot information data for at least the + generation of the DSO we are allocating data for. */ + _dl_update_slotinfo (imap->l_tls_modid); +#endif + + GL(dl_init_static_tls) (imap); + assert (imap->l_need_tls_init == 0); + } + } + /* Run the initializer functions of new objects. */ _dl_init (new, args->argc, args->argv, args->env); |