[RFA] frame.c (find_frame_sal): Check return value of get_frame_function.

[Michael Snyder <msnyder@vmware.com>]

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The return value for get_frame_function is usually checked for null.

OK?


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2011-03-04  Michael Snyder  <msnyder@vmware.com>

	* frame.c (find_frame_sal): Check return value of get_frame_function.

Index: frame.c
===================================================================
RCS file: /cvs/src/src/gdb/frame.c,v
retrieving revision 1.291
diff -u -p -r1.291 frame.c
--- frame.c	7 Jan 2011 19:36:17 -0000	1.291
+++ frame.c	5 Mar 2011 01:27:39 -0000
@@ -1892,15 +1892,16 @@ find_frame_sal (struct frame_info *frame
 	sym = inline_skipped_symbol (inferior_ptid);
 
       init_sal (sal);
-      if (SYMBOL_LINE (sym) != 0)
+      if (sym && SYMBOL_LINE (sym) != 0)
 	{
 	  sal->symtab = SYMBOL_SYMTAB (sym);
 	  sal->line = SYMBOL_LINE (sym);
 	}
       else
-	/* If the symbol does not have a location, we don't know where
-	   the call site is.  Do not pretend to.  This is jarring, but
-	   we can't do much better.  */
+	/* If the symbol does not have a location (or we didn't find a
+	   symbol), we don't know where the call site is.  Do not
+	   pretend to.  This is jarring, but we can't do much
+	   better.  */
 	sal->pc = get_frame_pc (frame);
 
       return;