commit 3528f84037833a799538a2fc48ed30dd09c77b5e

Author: Mark Wielaard <mark@klomp.org>

Date:   Fri Jan 11 21:52:26 2019 +0100

    readdwarf3.c (parse_type_DIE): Accept DW_TAG_subrange_type with DW_AT_count

    GCC9 generates a subrange_type with a lower_bound and count, but no

    upper_bound attribute. This simply means the upper bound is lower

    plus count.

diff --git a/coregrind/m_debuginfo/readdwarf3.c b/coregrind/m_debuginfo/readdwarf3.c

index e9a3816..1b49ba4 100644

--- a/coregrind/m_debuginfo/readdwarf3.c

+++ b/coregrind/m_debuginfo/readdwarf3.c

@@ -3610,6 +3610,7 @@ static void parse_type_DIE ( /*MOD*/XArray* /* of TyEnt */ tyents,

       Bool have_count = False;

       Long lower = 0;

       Long upper = 0;

+      Long count = 0;

       switch (parser->language) {

          case 'C': have_lower = True;  lower = 0; break;

@@ -3641,7 +3642,7 @@ static void parse_type_DIE ( /*MOD*/XArray* /* of TyEnt */ tyents,

             have_upper = True;

          }

          if (attr == DW_AT_count && cts.szB > 0) {

-            /*count    = (Long)cts.u.val;*/

+            count    = (Long)cts.u.val;

             have_count = True;

          }

       }

@@ -3680,6 +3681,11 @@ static void parse_type_DIE ( /*MOD*/XArray* /* of TyEnt */ tyents,

          boundE.Te.Bound.knownU = False;

          boundE.Te.Bound.boundL = 0;

          boundE.Te.Bound.boundU = 0;

+      } else if (have_lower && (!have_upper) && (have_count)) {

+         boundE.Te.Bound.knownL = True;

+         boundE.Te.Bound.knownU = True;

+         boundE.Te.Bound.boundL = lower;

+         boundE.Te.Bound.boundU = lower + count;

       } else {

          /* FIXME: handle more cases */

          goto_bad_DIE;