89 lines
3.7 KiB
Diff
89 lines
3.7 KiB
Diff
commit fe06fb313bddf7e4530056897d4a706606e49377
|
|
Author: Florian Weimer <fweimer@redhat.com>
|
|
Date: Thu Aug 1 23:31:23 2024 +0200
|
|
|
|
elf: Clarify and invert second argument of _dl_allocate_tls_init
|
|
|
|
Also remove an outdated comment: _dl_allocate_tls_init is
|
|
called as part of pthread_create.
|
|
|
|
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
|
|
|
|
diff -Nrup a/elf/dl-tls.c b/elf/dl-tls.c
|
|
--- a/elf/dl-tls.c 2024-08-09 20:22:18.516110414 -0400
|
|
+++ b/elf/dl-tls.c 2024-08-09 20:23:26.182493188 -0400
|
|
@@ -553,9 +553,14 @@ _dl_resize_dtv (dtv_t *dtv, size_t max_m
|
|
/* Allocate initial TLS. RESULT should be a non-NULL pointer to storage
|
|
for the TLS space. The DTV may be resized, and so this function may
|
|
call malloc to allocate that space. The loader's GL(dl_load_tls_lock)
|
|
- is taken when manipulating global TLS-related data in the loader. */
|
|
+ is taken when manipulating global TLS-related data in the loader.
|
|
+
|
|
+ If MAIN_THREAD, this is the first call during process
|
|
+ initialization. In this case, TLS initialization for secondary
|
|
+ (audit) namespaces is skipped because that has already been handled
|
|
+ by dlopen. */
|
|
void *
|
|
-_dl_allocate_tls_init (void *result, bool init_tls)
|
|
+_dl_allocate_tls_init (void *result, bool main_thread)
|
|
{
|
|
if (result == NULL)
|
|
/* The memory allocation failed. */
|
|
@@ -634,7 +639,7 @@ _dl_allocate_tls_init (void *result, boo
|
|
because it would already be set by the audit setup. However,
|
|
subsequent thread creation would need to follow the default
|
|
behaviour. */
|
|
- if (map->l_ns != LM_ID_BASE && !init_tls)
|
|
+ if (map->l_ns != LM_ID_BASE && main_thread)
|
|
continue;
|
|
memset (__mempcpy (dest, map->l_tls_initimage,
|
|
map->l_tls_initimage_size), '\0',
|
|
@@ -662,7 +667,7 @@ _dl_allocate_tls (void *mem)
|
|
{
|
|
return _dl_allocate_tls_init (mem == NULL
|
|
? _dl_allocate_tls_storage ()
|
|
- : allocate_dtv (mem), true);
|
|
+ : allocate_dtv (mem), false);
|
|
}
|
|
rtld_hidden_def (_dl_allocate_tls)
|
|
|
|
diff -Nrup a/elf/rtld.c b/elf/rtld.c
|
|
--- a/elf/rtld.c 2024-08-09 20:22:18.516110414 -0400
|
|
+++ b/elf/rtld.c 2024-08-09 20:24:17.584783701 -0400
|
|
@@ -2478,7 +2478,7 @@ ERROR: '%s': cannot process note segment
|
|
into the main thread's TLS area, which we allocated above.
|
|
Note: thread-local variables must only be accessed after completing
|
|
the next step. */
|
|
- _dl_allocate_tls_init (tcbp, false);
|
|
+ _dl_allocate_tls_init (tcbp, true);
|
|
|
|
/* And finally install it for the main thread. */
|
|
if (! tls_init_tp_called)
|
|
diff -Nrup a/nptl/allocatestack.c b/nptl/allocatestack.c
|
|
--- a/nptl/allocatestack.c 2024-08-09 20:22:17.808106408 -0400
|
|
+++ b/nptl/allocatestack.c 2024-08-09 20:25:49.436302396 -0400
|
|
@@ -244,7 +244,7 @@ get_cached_stack (size_t *sizep, void **
|
|
memset (dtv, '\0', (dtv[-1].counter + 1) * sizeof (dtv_t));
|
|
|
|
/* Re-initialize the TLS. */
|
|
- _dl_allocate_tls_init (TLS_TPADJ (result), true);
|
|
+ _dl_allocate_tls_init (TLS_TPADJ (result), false);
|
|
|
|
return result;
|
|
}
|
|
diff -Nrup a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
|
|
--- a/sysdeps/generic/ldsodefs.h 2024-08-09 20:22:18.517110419 -0400
|
|
+++ b/sysdeps/generic/ldsodefs.h 2024-08-09 20:34:20.093186159 -0400
|
|
@@ -1185,10 +1185,8 @@ extern void _dl_get_tls_static_info (siz
|
|
|
|
extern void _dl_allocate_static_tls (struct link_map *map) attribute_hidden;
|
|
|
|
-/* These are internal entry points to the two halves of _dl_allocate_tls,
|
|
- only used within rtld.c itself at startup time. */
|
|
extern void *_dl_allocate_tls_storage (void) attribute_hidden;
|
|
-extern void *_dl_allocate_tls_init (void *, bool);
|
|
+extern void *_dl_allocate_tls_init (void *result, bool main_thread);
|
|
rtld_hidden_proto (_dl_allocate_tls_init)
|
|
|
|
/* Deallocate memory allocated with _dl_allocate_tls. */
|