[repost] Support DW_AT_count inside DW_TAG_subrange_type

[Vladimir Prus <ghost@cs.msu.su>]

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Hello,
I've got not reply to the following message, which was posted on 31/05/2005.
Any change this patch will go in?

Original message below:

Hi,
the DWARF standard says that the DW_TAG_subrage_type tag can contain either
DW_AT_upper_bound or use DW_AT_count to specify upper bound relatively to 
lower bound. The version 6.3 of gdb, and the current CVS, support only 
DW_TAG_upper_bound.

The attached patch adds support for DW_AT_count.

The changelog entry could be:
2005-05-31  Vladimur Prus <ghost@cs.msu.su>

     dwarf2read.c (read_subrange_type): If no DW_AT_upper_bound attribute
         is present, try using DW_AT_count



Comments?

- Volodya


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--- dwarf2read.c.orig	2004-10-16 04:41:00.000000000 +0400
+++ dwarf2read.c	2005-05-31 17:38:57.000000000 +0400
@@ -4794,6 +4794,17 @@
       else
         high = dwarf2_get_attr_constant_value (attr, 1);
     }
+  else
+    {
+       /* Alternatively, the high boundary can be specified with the
+          DW_AT_count attribute, which must be added to the low value.
+       */
+       attr = dwarf2_attr (die, DW_AT_count, cu);        
+       if (attr)
+         {
+             high = dwarf2_get_attr_constant_value(attr, 0) + low - 1;
+         }
+    }  
 
   range_type = create_range_type (NULL, base_type, low, high);