elf: Add _dl_audit_activity_map and _dl_audit_activity_nsid

It consolidates the code required to call la_activity audit
callback.

Also for a new Lmid_t the namespace link_map list are empty, so it
requires to check if before using it.  This can happen for when audit
module is used along with dlmopen.

Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu.

Reviewed-by: Florian Weimer <fweimer@redhat.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/elf/dl-audit.c b/elf/dl-audit.c
index 4066dfe851..74b87f4b39 100644
--- a/elf/dl-audit.c
+++ b/elf/dl-audit.c
@@ -19,6 +19,32 @@
 #include <ldsodefs.h>
 
 void
+_dl_audit_activity_map (struct link_map *l, int action)
+{
+  struct audit_ifaces *afct = GLRO(dl_audit);
+  for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
+    {
+      if (afct->activity != NULL)
+	afct->activity (&link_map_audit_state (l, cnt)->cookie, action);
+      afct = afct->next;
+    }
+}
+
+void
+_dl_audit_activity_nsid (Lmid_t nsid, int action)
+{
+  /* If head is NULL, the namespace has become empty, and the audit interface
+     does not give us a way to signal LA_ACT_CONSISTENT for it because the
+     first loaded module is used to identify the namespace.  */
+  struct link_map *head = GL(dl_ns)[nsid]._ns_loaded;
+  if (__glibc_likely (GLRO(dl_naudit) == 0)
+      || head == NULL || head->l_auditing)
+    return;
+
+  _dl_audit_activity_map (head, action);
+}
+
+void
 _dl_audit_objopen (struct link_map *l, Lmid_t nsid)
 {
   if (__glibc_likely (GLRO(dl_naudit) == 0))