Fix dir command for duplicated paths and add a new testcase.

gdb/ChangeLog:
2014-01-07  Edjunior Barbosa Machado  <emachado@linux.vnet.ibm.com>

	* source.c (add_path): Fix check for duplicated paths in the previously
	included paths.

gdb/testsuite/ChangeLog:
2014-01-07  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gdb.base/source-dir.exp: New file.

4 files changed, 58 insertions, 10 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b16f344..b976827 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2014-01-07  Edjunior Barbosa Machado  <emachado@linux.vnet.ibm.com>
+
+	* source.c (add_path): Fix check for duplicated paths in the previously
+	included paths.
+
 2014-01-07  Honggyu Kim  <hong.gyu.kim@lge.com>
 
 	* ada-lang.c: Remove duplicated include statements.
diff --git a/gdb/source.c b/gdb/source.c
index b75a7b4..c112765 100644
--- a/gdb/source.c
+++ b/gdb/source.c
@@ -574,17 +574,33 @@ add_path (char *dirname, char **which_path, int parse_separators)
 	char tinybuf[2];
 
 	p = *which_path;
-	/* FIXME: we should use realpath() or its work-alike
-	   before comparing.  Then all the code above which
-	   removes excess slashes and dots could simply go away.  */
-	if (!filename_cmp (p, name))
+	while (1)
 	  {
-	    /* Found it in the search path, remove old copy.  */
-	    if (p > *which_path)
-	      p--;		/* Back over leading separator.  */
-	    if (prefix > p - *which_path)
-	      goto skip_dup;	/* Same dir twice in one cmd.  */
-	    memmove (p, &p[len + 1], strlen (&p[len + 1]) + 1);	/* Copy from next \0 or  : */
+	    /* FIXME: we should use realpath() or its work-alike
+	       before comparing.  Then all the code above which
+	       removes excess slashes and dots could simply go away.  */
+	    if (!filename_ncmp (p, name, len)
+		&& (p[len] == '\0' || p[len] == DIRNAME_SEPARATOR))
+	      {
+		/* Found it in the search path, remove old copy.  */
+		if (p > *which_path)
+		  {
+		    /* Back over leading separator.  */
+		    p--;
+		  }
+		if (prefix > p - *which_path)
+		  {
+		    /* Same dir twice in one cmd.  */
+		    goto skip_dup;
+		  }
+		/* Copy from next '\0' or ':'.  */
+		memmove (p, &p[len + 1], strlen (&p[len + 1]) + 1);
+	      }
+	    p = strchr (p, DIRNAME_SEPARATOR);
+	    if (p != 0)
+	      ++p;
+	    else
+	      break;
 	  }
 
 	tinybuf[0] = DIRNAME_SEPARATOR;
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 8b00435..c3a40de 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2014-01-07  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* gdb.base/source-dir.exp: New file.
+
 2014-01-07  Joel Brobecker  <brobecker@adacore.com>
 
 	* gdb.ada/pp-rec-component.exp, gdb.ada/pp-rec-component.py,
diff --git a/gdb/testsuite/gdb.base/source-dir.exp b/gdb/testsuite/gdb.base/source-dir.exp
new file mode 100644
index 0000000..43b56b7
--- /dev/null
+++ b/gdb/testsuite/gdb.base/source-dir.exp
@@ -0,0 +1,23 @@
+# Copyright 2014 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/>.
+
+standard_testfile
+
+gdb_start
+
+set foo "/nOtExStInG"
+
+gdb_test "directory $foo/a $foo/b $foo/c" "\r\nSource directories searched: $foo/a:$foo/b:$foo/c:\\\$cdir:\\\$cwd"
+gdb_test "directory $foo/b $foo/d $foo/c" "\r\nSource directories searched: $foo/b:$foo/d:$foo/c:$foo/a:\\\$cdir:\\\$cwd"