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* [binutils-gdb] [gdb/testsuite] Fix gdb.ada/literals.exp with aarch64
@ 2022-07-30 6:02 Tom de Vries
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From: Tom de Vries @ 2022-07-30 6:02 UTC (permalink / raw)
To: gdb-cvs
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"
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2022-07-30 6:02 [binutils-gdb] [gdb/testsuite] Fix gdb.ada/literals.exp with aarch64 Tom de Vries
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