[Bug gdb/15871] Unavailable entry value is not shown correctly

["qiyao at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15871

--- Comment #6 from Yao Qi <qiyao at gcc dot gnu.org> ---
(In reply to Jan Kratochvil from comment #4)
> With 7.6.50.20130821-cvs 33c592e735c7e79c7f4425a22df8389f129d7495 on Fedora
> 20pre x86_64 I get:
> 
> Running ./entry-values.exp ...
> ERROR: tcl error sourcing ./entry-values.exp.
> ERROR: Unimplemented: operands in location for DW_OP_deref_size
>     while executing
> "error "Unimplemented: operands in location for $opcode""
>     (procedure "_location" line 63)
>     invoked from within
> "_location $value"
>     (procedure "_handle_DW_FORM" line 82)
>     invoked from within
> "_handle_DW_FORM $attr_form $attr_value"
>     (procedure "_handle_DW_TAG" line 29)
>     invoked from within
> "_handle_DW_TAG DW_TAG_GNU_call_site_parameter $attrs $children"
>     (procedure "GNU_call_site_parameter" line 1)
>     invoked from within
> "GNU_call_site_parameter {
> 			{location {DW_OP_reg0} SPECIAL_expr}
> 			{GNU_call_site_value {
> 			    addr global1
> 			    deref_size 4
> 			} SPECIAL_expr}..."
>     ("uplevel" body line 5)
>     invoked from within
> [...]
> 
> Is it for some older GDB? I have not investigated it more.

Oh, this patch is also needed...

diff --git a/gdb/testsuite/lib/dwarf.exp b/gdb/testsuite/lib/dwarf.exp
index 5b19bb8..99f4b06 100644
--- a/gdb/testsuite/lib/dwarf.exp
+++ b/gdb/testsuite/lib/dwarf.exp
@@ -667,6 +667,14 @@ namespace eval Dwarf {
             _op .sleb128 [lindex $line 2]
         }

+        DW_OP_deref_size {
+            if {[llength $line] != 2} {
+            error "usage: DW_OP_deref_size SIZE"
+            }
+
+            _op .byte [lindex $line 1]
+        }
+
         default {
             if {[llength $line] > 1} {
             error "Unimplemented: operands in location for $opcode"
-- 
1.7.7.6

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