Re: [RFA] ax-gdb: Do not treat enums and bools as integers.

[Joel Brobecker <brobecker at adacore dot com>]

> FWIW you can see the bug from C, if you make an enum type and then
> compile with -fshort-enums (which IIRC is the default for some targets).

Genius! I did not know this switch for C...

Attached is the testcase I created for it. Tested on x86_64-linux,
with and without gdbserver. In the gdbserver case, I verified that
it fails without the fix.

> Joel>         * ax-gdb.c (gen_usual_unary): Remove special handling of
> Joel>         enum and bool types.
> 
> I think it is correct.

Thanks for review. Patch and testcase now both checked in.

-- 
Joel

>From 48e165d8e2f9f86ff8fc9271a4150793a6a17eae Mon Sep 17 00:00:00 2001
From: Joel Brobecker <brobecker@adacore.com>
Date: Tue, 13 Mar 2012 18:28:22 -0700
Subject: [PATCH] Testcase for: "ax-gdb: Do not treat enums and bools as integers".

gdb/testsuite/ChangeLog:

        * gdb.base/enum_cond.c, gdb.base/enum_cond.exp: New testcase.
---
 gdb/testsuite/ChangeLog              |    4 +++
 gdb/testsuite/gdb.base/enum_cond.c   |   48 ++++++++++++++++++++++++++++++++++
 gdb/testsuite/gdb.base/enum_cond.exp |   44 +++++++++++++++++++++++++++++++
 3 files changed, 96 insertions(+), 0 deletions(-)
 create mode 100644 gdb/testsuite/gdb.base/enum_cond.c
 create mode 100644 gdb/testsuite/gdb.base/enum_cond.exp

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index c05bcf4..f83a8ba 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,5 +1,9 @@
 2012-03-13  Joel Brobecker  <brobecker@adacore.com>
 
+	* gdb.base/enum_cond.c, gdb.base/enum_cond.exp: New testcase.
+
+2012-03-13  Joel Brobecker  <brobecker@adacore.com>
+
 	* gdb.ada/bp_range_type: New testcase.
 
 2012-03-13  Doug Evans  <dje@google.com>
diff --git a/gdb/testsuite/gdb.base/enum_cond.c b/gdb/testsuite/gdb.base/enum_cond.c
new file mode 100644
index 0000000..5c152a4
--- /dev/null
+++ b/gdb/testsuite/gdb.base/enum_cond.c
@@ -0,0 +1,48 @@
+/* This testcase is part of GDB, the GNU debugger.
+   Copyright 2012 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+enum EE
+{
+  VALUE = 1
+};
+
+struct x
+{
+  unsigned char before;
+  enum EE e;
+  unsigned char after;
+};
+
+
+int
+call_me (struct x param)
+{
+  return param.e;
+}
+
+int
+main (void)
+{
+  struct x val;
+
+  val.before = 0xff;
+  val.e = VALUE;
+  val.after = 0xff;
+
+  call_me (val);
+  return 0;
+}
+
diff --git a/gdb/testsuite/gdb.base/enum_cond.exp b/gdb/testsuite/gdb.base/enum_cond.exp
new file mode 100644
index 0000000..5c041d9
--- /dev/null
+++ b/gdb/testsuite/gdb.base/enum_cond.exp
@@ -0,0 +1,44 @@
+# Copyright 2012 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# This file is part of the gdb testsuite.  It is intended to test that
+# gdb can correctly print arrays with indexes for each element of the
+# array.
+
+set testfile "enum_cond"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+
+set opts [list debug additional_flags=-fshort-enums]
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable $opts] != "" } {
+    untested "Could not compile ${srcfile}"
+    return -1
+}
+
+clean_restart $testfile
+
+if ![runto_main] then {
+    perror "could not run to main"
+    continue
+}
+
+gdb_test "break call_me if param.e == 1" \
+         "Breakpoint $decimal at $hex: file .*$srcfile, line $decimal\\."
+
+# Continue.  We should hit our breakpoint...
+gdb_test "continue" \
+         "Breakpoint $decimal, call_me \\(param=\\.\\.\\.\\) at .*" \
+         "continue to conditional breakpoint in call_me"
+
-- 
1.7.1