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ld.so: Export tls_init_tp_called as __rtld_tls_init_tp_called

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This allows the rest of dynamic loader to check whether the TCB
has been set up (and THREAD_GETMEM and THREAD_SETMEM will work).

Reviewed-by: Siddhesh Poyarekar <siddhesh@gotplt.org>
This commit is contained in:
Florian Weimer 2022-10-27 11:36:44 +02:00
parent 77db67c56b
commit a65ff76c9a
2 changed files with 8 additions and 5 deletions
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10
elf/rtld.c
View File

@ -730,7 +730,7 @@ match_version (const char *string, struct link_map *map)
return 0;
}
static bool tls_init_tp_called;
bool __rtld_tls_init_tp_called;
static void *
init_tls (size_t naudit)
@ -800,7 +800,7 @@ cannot allocate TLS data structures for initial thread\n");
if (__glibc_unlikely (lossage != NULL))
_dl_fatal_printf ("cannot set up thread-local storage: %s\n", lossage);
__tls_init_tp ();
tls_init_tp_called = true;
__rtld_tls_init_tp_called = true;
return tcbp;
}
@ -2050,7 +2050,7 @@ dl_main (const ElfW(Phdr) *phdr,
an old kernel that can't perform TLS_INIT_TP, even if no TLS is ever
used. Trying to do it lazily is too hairy to try when there could be
multiple threads (from a non-TLS-using libpthread). */
bool was_tls_init_tp_called = tls_init_tp_called;
bool was_tls_init_tp_called = __rtld_tls_init_tp_called;
if (tcbp == NULL)
tcbp = init_tls (0);
@ -2321,7 +2321,7 @@ dl_main (const ElfW(Phdr) *phdr,
consider_profiling);
/* Add object to slot information data if necessasy. */
if (l->l_tls_blocksize != 0 && tls_init_tp_called)
if (l->l_tls_blocksize != 0 && __rtld_tls_init_tp_called)
_dl_add_to_slotinfo (l, true);
}
}
@ -2347,7 +2347,7 @@ dl_main (const ElfW(Phdr) *phdr,
_dl_allocate_tls_init (tcbp, false);
/* And finally install it for the main thread. */
if (! tls_init_tp_called)
if (! __rtld_tls_init_tp_called)
{
const char *lossage = TLS_INIT_TP (tcbp);
if (__glibc_unlikely (lossage != NULL))

3
sysdeps/generic/ldsodefs.h
View File

@ -1219,6 +1219,9 @@ extern void *_dl_allocate_tls_storage (void) attribute_hidden;
extern void *_dl_allocate_tls_init (void *, bool);
rtld_hidden_proto (_dl_allocate_tls_init)
/* True if the TCB has been set up. */
extern bool __rtld_tls_init_tp_called attribute_hidden;
/* Deallocate memory allocated with _dl_allocate_tls. */
extern void _dl_deallocate_tls (void *tcb, bool dealloc_tcb);
rtld_hidden_proto (_dl_deallocate_tls)