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authorFlorian Weimer <fweimer@redhat.com>2017-06-30 21:10:23 +0200
committerFlorian Weimer <fweimer@redhat.com>2017-07-03 20:52:59 +0200
commit352f4ff9a268b81ef5d4b2413f582565806e4790 (patch)
treefb27056dfdeafe43c021f6127c9544c016e78019 /resolv/res-close.c
parent4e45d83c92dbb5b8dc20654f32395108d18cf739 (diff)
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resolv: Introduce struct resolv_context [BZ #21668]
struct resolv_context objects provide a temporary resolver context
which does not change during a name lookup operation.  Only when the
outmost context is created, the stub resolver configuration is
verified to be current (at present, only against previous res_init
calls).  Subsequent attempts to obtain the context will reuse the
result of the initial verification operation.

struct resolv_context can also be extended in the future to store
data which needs to be deallocated during thread cancellation.
Diffstat (limited to 'resolv/res-close.c')
-rw-r--r--resolv/res-close.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/resolv/res-close.c b/resolv/res-close.c
index 73f18d1525..97da73c99c 100644
--- a/resolv/res-close.c
+++ b/resolv/res-close.c
@@ -83,6 +83,7 @@
  */
 
 #include <resolv-internal.h>
+#include <resolv_context.h>
 #include <not-cancel.h>
 
 /* Close all open sockets.  If FREE_ADDR is true, deallocate any
@@ -124,6 +125,8 @@ libc_hidden_def (__res_nclose)
 static void __attribute__ ((section ("__libc_thread_freeres_fn")))
 res_thread_freeres (void)
 {
+  __resolv_context_freeres ();
+
   if (_res.nscount == 0)
     /* Never called res_ninit.  */
     return;