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authorSiddhesh Poyarekar <siddhesh@redhat.com>2013-02-18 19:08:21 +0530
committerSiddhesh Poyarekar <siddhesh@redhat.com>2013-02-18 19:08:21 +0530
commitba384f6ed9275f3966505f2375b56d169e3dc588 (patch)
treed832a5a24bab934c946089b8d2a9a16f1766470d /include/link.h
parentffaa74cf68a370e232279a9a9b0a02ade287cc99 (diff)
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C++11 thread_local destructors support
This feature is specifically for the C++ compiler to offload calling
thread_local object destructors on thread program exit, to glibc.
This is to overcome the possible complication of destructors of
thread_local objects getting called after the DSO in which they're
defined is unloaded by the dynamic linker.  The DSO is marked as
'unloadable' if it has a constructed thread_local object and marked as
'unloadable' again when all the constructed thread_local objects
defined in it are destroyed.
Diffstat (limited to 'include/link.h')
-rw-r--r--include/link.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/link.h b/include/link.h
index 230e95d6c8..7dc3cd1e32 100644
--- a/include/link.h
+++ b/include/link.h
@@ -302,6 +302,9 @@ struct link_map
     /* Index of the module in the dtv array.  */
     size_t l_tls_modid;
 
+    /* Number of thread_local objects constructed by this DSO.  */
+    size_t l_tls_dtor_count;
+
     /* Information used to change permission after the relocations are
        done.  */
     ElfW(Addr) l_relro_addr;