From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
From: Fedora GDB patches <invalid@email.com>
Date: Fri, 27 Oct 2017 21:07:50 +0200
Subject: gdb-6.5-bz218379-solib-trampoline-lookup-lock-fix.patch

;; Fix lockup on trampoline vs. its function lookup; unreproducible (BZ 218379).
;;=fedora

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=218379

diff --git a/gdb/symtab.c b/gdb/symtab.c
--- a/gdb/symtab.c
+++ b/gdb/symtab.c
@@ -3167,6 +3167,13 @@ find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent)
 	     SYMBOL_LINKAGE_NAME (msymbol)); */
 	  ;
 	/* fall through */
+	/* `msymbol' trampoline may be located before its .text symbol
+	   but this text symbol may be the address we were looking for.
+	   Avoid `find_pc_sect_line'<->`find_pc_line' infinite loop.
+	   Red Hat Bug 218379.  */
+	else if (BMSYMBOL_VALUE_ADDRESS (mfunsym) == pc)
+	  warning ("In stub for %s (0x%s); interlocked, please submit the binary to http://bugzilla.redhat.com", MSYMBOL_LINKAGE_NAME (msymbol.minsym), paddress (target_gdbarch (), pc));
+	/* fall through */
 	else
 	  return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym), 0);
       }