@@ -220,7 +220,7 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \
tst-dlopenfail-2 \
tst-filterobj tst-filterobj-dlopen tst-auxobj tst-auxobj-dlopen \
tst-audit14 tst-audit15 tst-audit16 tst-audit17 tst-audit18 \
- tst-audit19 tst-audit20 \
+ tst-audit19 tst-audit20 tst-audit21 \
tst-single_threaded tst-single_threaded-pthread \
tst-tls-ie tst-tls-ie-dlmopen argv0test \
tst-glibc-hwcaps tst-glibc-hwcaps-prepend tst-glibc-hwcaps-mask \
@@ -304,6 +304,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
tst-auditmod9a tst-auditmod9b \
tst-auditmod18 tst-auditmod19 \
tst-auditmod20 tst-audit20mod \
+ tst-auditmod21 \
$(if $(CXX),tst-unique3lib tst-unique3lib2 tst-unique4lib \
tst-nodelete-uniquemod tst-nodelete-rtldmod \
tst-nodelete-zmod \
@@ -1516,6 +1517,9 @@ $(objpfx)tst-audit20.out: $(objpfx)tst-auditmod20.so \
$(objpfx)tst-audit20mod.so
tst-audit20-ARGS = -- $(host-test-program-cmd)
+$(objpfx)tst-audit21.out: $(objpfx)tst-auditmod21.so
+tst-audit21-ENV = LD_AUDIT=$(objpfx)tst-auditmod21.so
+
# tst-sonamemove links against an older implementation of the library.
LDFLAGS-tst-sonamemove-linkmod1.so = \
-Wl,--version-script=tst-sonamemove-linkmod1.map \
@@ -175,6 +175,9 @@ _dl_new_object (char *realname, const char *libname, int type,
new->l_local_scope[0] = &new->l_searchlist;
+ if (mode & __RTLD_AUDIT)
+ new->l_dont_set_tls_static = 1;
+
/* Determine the origin. If allocating the link map for the main
executable, the realname is not known and "". In this case, the
origin needs to be determined by other means. However, in case
@@ -593,10 +593,18 @@ _dl_allocate_tls_init (void *result)
some platforms use in static programs requires it. */
dtv[map->l_tls_modid].pointer.val = dest;
- /* Copy the initialization image and clear the BSS part. */
- memset (__mempcpy (dest, map->l_tls_initimage,
- map->l_tls_initimage_size), '\0',
- map->l_tls_blocksize - map->l_tls_initimage_size);
+ /* Copy the initialization image and clear the BSS part. For
+ ldaudit modules or depedencies with initial-exec TLS, we can not
+ set the initial TLS image on default loader initialization
+ because it would already be set by the ldaudit setup. However,
+ subsequent thread creation would need to follow the default
+ behaviour. */
+ if (__glibc_unlikely (!map->l_dont_set_tls_static))
+ memset (__mempcpy (dest, map->l_tls_initimage,
+ map->l_tls_initimage_size), '\0',
+ map->l_tls_blocksize - map->l_tls_initimage_size);
+ else
+ map->l_dont_set_tls_static = 0;
}
total += cnt;
@@ -1053,6 +1053,8 @@ ERROR: audit interface '%s' requires version %d (maximum supported version %d);
/* Mark the DSO as being used for auditing. */
dlmargs.map->l_auditing = 1;
+ /* Mark the DSO to not clear the TLS bss in tls initialization. */
+ dlmargs.map->l_dont_set_tls_static = 1;
}
/* Notify the the audit modules that the object MAP has already been
new file mode 100644
@@ -0,0 +1,42 @@
+/* Check DT_AUDIT with static TLS.
+ Copyright (C) 2021 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <ctype.h>
+#include <support/xthread.h>
+#include <support/check.h>
+
+static volatile __thread int out __attribute__ ((tls_model ("initial-exec")));
+
+static void *
+tf (void *)
+{
+ TEST_COMPARE (out, 0);
+ out = isspace (' ');
+ return NULL;
+}
+
+int main (int argc, char *argv[])
+{
+ TEST_COMPARE (out, 0);
+ out = isspace (' ');
+
+ pthread_t t = xpthread_create (NULL, tf, NULL);
+ xpthread_join (t);
+
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,69 @@
+/* Check DT_AUDIT with static TLS.
+ Copyright (C) 2021 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <link.h>
+
+#define tls_ie __attribute__ ((tls_model ("initial-exec")))
+
+__thread int tls_var0 tls_ie;
+__thread int tls_var1 tls_ie = 0x10;
+
+static volatile int out;
+
+static void
+call_libc (void)
+{
+ /* isspace() access the initial-exec glibc TLS variables, which are
+ setup in glibc initialization. */
+ out = isspace (' ');
+}
+
+unsigned int
+la_version (unsigned int v)
+{
+ tls_var0 = 0x1;
+ if (tls_var1 != 0x10)
+ abort ();
+ tls_var1 = 0x20;
+ call_libc ();
+ return LAV_CURRENT;
+}
+
+unsigned int
+la_objopen (struct link_map* map, Lmid_t lmid, uintptr_t* cookie)
+{
+ call_libc ();
+ *cookie = (uintptr_t) map;
+ return 0;
+}
+
+void
+la_activity (uintptr_t* cookie, unsigned int flag)
+{
+ if (tls_var0 != 0x1 || tls_var1 != 0x20)
+ abort ();
+ call_libc ();
+}
+
+void
+la_preinit (uintptr_t* cookie)
+{
+ call_libc ();
+}
@@ -190,6 +190,8 @@ struct link_map
unsigned int l_need_tls_init:1; /* Nonzero if GL(dl_init_static_tls)
should be called on this link map
when relocation finishes. */
+ unsigned int l_dont_set_tls_static:1; /* Non zero if static TLS setup should
+ not be initialized. */
unsigned int l_auditing:1; /* Nonzero if the DSO is used in auditing. */
unsigned int l_audit_any_plt:1; /* Nonzero if at least one audit module
is interested in the PLT interception.*/