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[RFA] Only try to load libthread_db when we load libpthread.
- From: dje at google dot com (Doug Evans)
- To: gdb-patches at sourceware dot org
- Date: Wed, 5 Oct 2011 11:27:05 -0700 (PDT)
- Subject: [RFA] Only try to load libthread_db when we load libpthread.
System libraries are typically last in the list of libraries to load,
and in a program with lots of shared libraries this results
in lots of pointless attempts to load libthread_db.
No regressions in amd64-linux,
but I can imagine it misses some cases.
2011-10-05 Doug Evans <email@example.com>
* linux-thread-db.c (thread_db_new_objfile): Only try to load
libthread_db when we load libpthread.
RCS file: /cvs/src/src/gdb/linux-thread-db.c,v
retrieving revision 1.91
diff -u -p -r1.91 linux-thread-db.c
--- linux-thread-db.c 13 Sep 2011 19:27:01 -0000 1.91
+++ linux-thread-db.c 5 Oct 2011 18:16:17 -0000
@@ -1083,7 +1083,12 @@ thread_db_new_objfile (struct objfile *o
/* This observer must always be called with inferior_ptid set
- if (objfile != NULL)
+ if (objfile != NULL
+ /* Only check for thread_db if we loaded libpthread.
+ Libpthread can be near the end of the list of shared libraries to
+ load, and in an app of several thousand shared libraries, this can
+ otherwise be painful. */
+ && libpthread_name_p (objfile->name))