[binutils-gdb] [gdb/testsuite] Fix gdb.python/py-value-cc.exp for big endian

[Tom de Vries <vries@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=a0d5ef869da20e023e4b75860012c56273f26d92

commit a0d5ef869da20e023e4b75860012c56273f26d92
Author: Tom de Vries <tdevries@suse.de>
Date:   Thu Jan 19 13:44:13 2023 +0100

    [gdb/testsuite] Fix gdb.python/py-value-cc.exp for big endian
    
    On s390x-linux, I run into:
    ...
    (gdb) python print(u[u_fields[0]])^M
    99^M
    (gdb) PASS: gdb.python/py-value-cc.exp: u's first field via field
    python print(u[u_fields[1]])^M
    0 '\000'^M
    (gdb) FAIL: gdb.python/py-value-cc.exp: u's second field via field
    ...
    
    There's a var u of this type:
    ...
    union U {
      int a;
      char c;
    };
    ...
    and after assigning 99 to u.a, the test-case expects u.c to contain 99 (which
    it does on x86_64), but instead it contains 0.
    
    Fix this by instead assigning 0x63636363, to ensure that u.c == 99 for both
    little and big endian.
    
    Tested on x86_64-linux and s390x-linux.

Diff:
---
 gdb/testsuite/gdb.python/py-value-cc.cc  | 2 +-
 gdb/testsuite/gdb.python/py-value-cc.exp | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/gdb/testsuite/gdb.python/py-value-cc.cc b/gdb/testsuite/gdb.python/py-value-cc.cc
index 817b089c35f..d82e385d6c5 100644
--- a/gdb/testsuite/gdb.python/py-value-cc.cc
+++ b/gdb/testsuite/gdb.python/py-value-cc.cc
@@ -77,7 +77,7 @@ func (const A &a)
   Btd &b_td = b1;
 
   U u;
-  u.a = 99;
+  u.a = 0x63636363;
 
   X x;
   x.x = 101;
diff --git a/gdb/testsuite/gdb.python/py-value-cc.exp b/gdb/testsuite/gdb.python/py-value-cc.exp
index 1ea10ad0058..b6571cd8297 100644
--- a/gdb/testsuite/gdb.python/py-value-cc.exp
+++ b/gdb/testsuite/gdb.python/py-value-cc.exp
@@ -80,7 +80,8 @@ gdb_test "python print(b_td\[b_fields\[0\]\].type.target())" "A" \
 gdb_test "python print(b_td\[b_fields\[0\]\]\['a'\])" "100" \
   "b_td.A::a via field"
 
-gdb_test "python print(u\[u_fields\[0\]\])" "99.*" "u's first field via field"
+gdb_test "python print(hex(u\[u_fields\[0\]\]))" "0x63636363.*" \
+    "u's first field via field"
 gdb_test "python print(u\[u_fields\[1\]\])" "99.*" "u's second field via field"
 
 gdb_test "python print(len(x_fields))" "2" "number for fields in u"