[v2,1/2] count number of loaded objects in each namespace only once

Message ID 1470382826-6022-2-git-send-email-gleb@scylladb.com
State New, archived
Headers

Commit Message

Gleb Natapov Aug. 5, 2016, 7:40 a.m. UTC
  _ns_nloaded already has count of all objects in a namespace, no need to
add it while iterating over all objects.
---
 elf/dl-iteratephdr.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)
  

Patch

diff --git a/elf/dl-iteratephdr.c b/elf/dl-iteratephdr.c
index 1cb6e26..e4e7205 100644
--- a/elf/dl-iteratephdr.c
+++ b/elf/dl-iteratephdr.c
@@ -48,17 +48,18 @@  __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
 #ifdef SHARED
   const void *caller = RETURN_ADDRESS (0);
   for (Lmid_t cnt = GL(dl_nns) - 1; cnt > 0; --cnt)
-    for (struct link_map *l = GL(dl_ns)[cnt]._ns_loaded; l; l = l->l_next)
-      {
-	/* We have to count the total number of loaded objects.  */
-	nloaded += GL(dl_ns)[cnt]._ns_nloaded;
-
-	if (caller >= (const void *) l->l_map_start
-	    && caller < (const void *) l->l_map_end
-	    && (l->l_contiguous
-		|| _dl_addr_inside_object (l, (ElfW(Addr)) caller)))
-	  ns = cnt;
-      }
+    {
+      /* We have to count the total number of loaded objects.  */
+      nloaded += GL(dl_ns)[cnt]._ns_nloaded;
+      for (struct link_map *l = GL(dl_ns)[cnt]._ns_loaded; l; l = l->l_next)
+        {
+          if (caller >= (const void *) l->l_map_start
+              && caller < (const void *) l->l_map_end
+              && (l->l_contiguous
+                  || _dl_addr_inside_object (l, (ElfW(Addr)) caller)))
+            ns = cnt;
+        }
+    }
 #endif
 
   for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next)