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| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | elf/dl-open.c | 12 |
2 files changed, 19 insertions, 0 deletions
@@ -1,3 +1,10 @@ +2009-04-19 Ulrich Drepper <drepper@redhat.com> + + [BZ #10069] + * elf/dl-open.c (dl_open_worker): We cannot guarantee that we can load + an object that uses static TLS if the TLS modid is higher than the + reserve we always allocate. At least for multi-threaded code. + 2009-04-18 Ulrich Drepper <drepper@redhat.com> * stdlib/strfmon_l.c (__vstrfmon_l): Don't wrap when computing width. diff --git a/elf/dl-open.c b/elf/dl-open.c index 458cf0c..c3f0e42 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -490,6 +490,18 @@ dl_open_worker (void *a) 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 |