[RFA] Add testcase for locals identified with FUNCTION::VAR syntax.

[Paul Hilfinger <Hilfinger@adacore.com>]

This test (from Joel Brobecker) stops inside a recursive function
after a few levels of recursion, goes up some frames, and then
accesses a local variable with 'print foo::val' rather than the usual
'print val' to see if the former pays attention to the selected frame.

2011-12-27  Paul Hilfinger  <hilfingr@adacore.com>
            Joel Brobecker <brobecker@adacore.com>

 * gdb.base/recpar.c, gdb.base/recpar.exp: New files.
---
 gdb/testsuite/ChangeLog           |    4 +++
 gdb/testsuite/gdb.base/recpar.c   |   42 +++++++++++++++++++++++++++++++++
 gdb/testsuite/gdb.base/recpar.exp |   46 +++++++++++++++++++++++++++++++++++++
 3 files changed, 92 insertions(+), 0 deletions(-)
 create mode 100644 gdb/testsuite/gdb.base/recpar.c
 create mode 100644 gdb/testsuite/gdb.base/recpar.exp

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index e07ac47..e669198 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2011-12-27  Paul Hilfinger  <hilfingr@adacore.com>
+
+	* gdb.base/recpar.c, gdb.base/recpar.exp: New files.
+
 2011-12-27  Joel Brobecker  <brobecker@adacore.com>
 
 	* gdb.base/dmsym.c, gdb.base/dmsym_main.c, gdb.base/dmsym.exp:
diff --git a/gdb/testsuite/gdb.base/recpar.c b/gdb/testsuite/gdb.base/recpar.c
new file mode 100644
index 0000000..bba5f5a
--- /dev/null
+++ b/gdb/testsuite/gdb.base/recpar.c
@@ -0,0 +1,42 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2011 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/>.  */
+
+int
+foo (int n)
+{
+  int val = n;
+
+  {
+    char val = n ? 'y' : 'n'; /* Hides upper-level `val'.  */
+
+    if (val == 'y') /* BREAK */
+      return n + foo (n - 1);
+  }
+
+  return 0;
+}
+
+int
+main (void)
+{
+  int res = foo (5);
+
+  if (res != 15) /* Dummy use of variable res.  */
+    return 1;
+
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.base/recpar.exp b/gdb/testsuite/gdb.base/recpar.exp
new file mode 100644
index 0000000..22771d2
--- /dev/null
+++ b/gdb/testsuite/gdb.base/recpar.exp
@@ -0,0 +1,46 @@
+# Copyright (C) 2011 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/>.
+
+set testfile recpar
+set srcfile ${testfile}.c
+if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile}] } {
+    return -1
+}
+
+if ![runto_main] {
+    untested ${testfile}.exp
+    return -1
+}
+
+# Some convenient regular expressions...
+set num "\[0-9\]+"
+set addr "0x\[0-9a-zA-Z\]+"
+
+gdb_test "break $srcfile:[gdb_get_line_number BREAK $srcfile] if n == 3" \
+         "Breakpoint $num at $addr: file .*recpar\\.c, line $num\\."
+
+gdb_test "continue" \
+         "Breakpoint .* foo \\(n=3\\) at .*$srcfile:$num.*"
+
+gdb_test "backtrace" \
+         "#0 +foo \\(n=3\\).*\r\n#1.* foo \\(n=4\\).*\r\n#2.* foo \\(n=5\\).*#3.* main \\(\\).*"
+
+gdb_test "frame 2" \
+         "#2 .* foo \\(n=5\\) .*"
+
+# In the currently selected frame, n=5, and thus foo::val should be 5
+# as well.
+gdb_test "print foo::val" \
+         " = 5"
-- 
1.7.0.4




-- 
Paul N. Hilfinger
(Hilfinger@adacore.com)