[binutils-gdb] [gdb/testsuite] Fix gdb.ada/literals.exp with aarch64

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

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=61b9faef51ddd40f9e6de0e41b66c41cd943d868

commit 61b9faef51ddd40f9e6de0e41b66c41cd943d868
Author: Tom de Vries <tdevries@suse.de>
Date:   Sat Jul 30 08:02:20 2022 +0200

    [gdb/testsuite] Fix gdb.ada/literals.exp with aarch64
    
    On aarch64-linux, I run into:
    ...
    (gdb) print 16#ffffffffffffffff#^M
    $7 = 18446744073709551615^M
    (gdb) FAIL: gdb.ada/literals.exp: print 16#ffffffffffffffff#
    ...
    while on x86_64-linux instead, I get:
    ...
    (gdb) print 16#ffffffffffffffff#^M
    $7 = -1^M
    (gdb) PASS: gdb.ada/literals.exp: print 16#ffffffffffffffff#
    ...
    
    We can easily reproduce this on x86_64-linux using:
    ...
    $ gdb -q -batch -ex "set lang ada" -ex "set arch i386" \
      -ex "print 16#ffffffffffffffff#"
    $1 = -1
    $ gdb -q -batch -ex "set lang ada" -ex "set arch aarch64" \
      -ex "print 16#ffffffffffffffff#"
    $1 = 18446744073709551615
    ...
    
    With i386, we have:
    ...
    (gdb) p int_bits
    $3 = 32
    (gdb) p long_bits
    $4 = 32
    (gdb) p long_long_bits
    $5 = 64
    ...
    and so in processInt we hit the fits-in-unsigned-long-long case where we use
    as type long long:
    ...
          /* Note: Interprets ULLONG_MAX as -1.  */
          yylval.typed_val.type = type_long_long (par_state);
    ...
    
    With aarch64, we have instead:
    ...
    (gdb) p int_bits
    $1 = 32
    (gdb) p long_bits
    $2 = 64
    (gdb) p long_long_bits
    $3 = 64
    ...
    and so in processInt we hit the fits-in-unsigned-long case where we use
    as type unsigned long:
    ...
          yylval.typed_val.type
            = builtin_type (par_state->gdbarch ())->builtin_unsigned_long;
    ...
    
    It's not clear why for ada we're using long long for the
    fits-in-unsigned-long-long case.
    
    Fix this by using unsigned long long for the fits-in-unsigned-long-long case,
    meaning the new reference output is 18446744073709551615 instead of -1.
    
    Tested on x86_64-linux.
    
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29416

Diff:
---
 gdb/ada-lex.l                      | 4 ++--
 gdb/testsuite/gdb.ada/literals.exp | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/gdb/ada-lex.l b/gdb/ada-lex.l
index 002eb811e41..ed88d502e9f 100644
--- a/gdb/ada-lex.l
+++ b/gdb/ada-lex.l
@@ -498,8 +498,8 @@ processInt (struct parser_state *par_state, const char *base0,
     yylval.typed_val.type = type_long_long (par_state);
   else if (fits_in_type (1, value, long_long_bits, false))
     {
-      /* Note: Interprets ULLONG_MAX as -1.  */
-      yylval.typed_val.type = type_long_long (par_state);
+      yylval.typed_val.type
+	= builtin_type (par_state->gdbarch ())->builtin_unsigned_long_long;
       /* See unsigned long case above.  */
       if (value & LONGEST_SIGN)
 	yylval.typed_val.val =
diff --git a/gdb/testsuite/gdb.ada/literals.exp b/gdb/testsuite/gdb.ada/literals.exp
index a6ac89b540f..6badc857292 100644
--- a/gdb/testsuite/gdb.ada/literals.exp
+++ b/gdb/testsuite/gdb.ada/literals.exp
@@ -36,4 +36,4 @@ gdb_test "print 16#f#e1" " = 240"
 gdb_test "print 16#1#e10" " = 1099511627776"
 
 gdb_test "print/x 16#7fffffffffffffff#" " = 0x7fffffffffffffff"
-gdb_test "print 16#ffffffffffffffff#" " = -1"
+gdb_test "print 16#ffffffffffffffff#" " = 18446744073709551615"