GNU C Library master sources branch master updated. glibc-2.18-375-g9182aa6

[jkratoch at sourceware dot org]

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=9182aa67994f4e8db378a949812176453e06cb34

commit 9182aa67994f4e8db378a949812176453e06cb34
Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Date:   Mon Nov 11 18:03:58 2013 +0100

    Fix vDSO l_name for GDB's: Can't read pathname for load map: Input/output error.

diff --git a/ChangeLog b/ChangeLog
index d330b58..2d9785b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2013-11-11  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	[BZ #387]
+	* elf/dl-object.c (_dl_new_object): Initialize L_NAME from NEWNAME if
+	it is empty.
+
 2013-11-11  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
 
         * benchtests/Makefile: Add bench-strtod.
diff --git a/elf/dl-object.c b/elf/dl-object.c
index 0f594d2..26d4f44 100644
--- a/elf/dl-object.c
+++ b/elf/dl-object.c
@@ -88,7 +88,13 @@ _dl_new_object (char *realname, const char *libname, int type,
   /* newname->next = NULL;	We use calloc therefore not necessary.  */
   newname->dont_free = 1;
 
-  new->l_name = realname;
+  /* When we create the executable link map, or a VDSO link map, we start
+     with "" for the l_name. In these cases "" points to ld.so rodata
+     and won't get dumped during core file generation. Therefore to assist
+     gdb and to create more self-contained core files we adjust l_name to
+     point at the newly allocated copy (which will get dumped) instead of
+     the ld.so rodata copy.  */
+  new->l_name = *realname ? realname : (char *) newname->name + libname_len - 1;
   new->l_type = type;
   /* If we set the bit now since we know it is never used we avoid
      dirtying the cache line later.  */

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog       |    6 ++++++
 elf/dl-object.c |    8 +++++++-
 2 files changed, 13 insertions(+), 1 deletions(-)


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