[RFC gdb 9] Revert basenames_may_differ patch

[Tom Tromey]

Commit a0c1ffedc regressed certain cases coming from Eclipse.
See PR breakpoints/24915.

This patch reverts the commit for the gdb 9 release.

gdb/ChangeLog
2020-02-05  Tom Tromey  <tromey@adacore.com>

	PR breakpoints/24915:
	* source.c (find_and_open_source): Do not check basenames_may_differ.

gdb/testsuite/ChangeLog
2020-02-05  Tom Tromey  <tromey@adacore.com>

	PR breakpoints/24915:
	* gdb.base/annotate-symlink.exp: Use setup_xfail.

Change-Id: Iadbf42f35eb40c95ad32b2108ae25d8f199998bd
---
 gdb/ChangeLog                               |  5 +++++
 gdb/source.c                                | 19 +++++++------------
 gdb/testsuite/ChangeLog                     |  5 +++++
 gdb/testsuite/gdb.base/annotate-symlink.exp |  3 +++
 4 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/gdb/source.c b/gdb/source.c
index 2497e7f750e..a737c95e7a4 100644
--- a/gdb/source.c
+++ b/gdb/source.c
@@ -1025,10 +1025,7 @@ find_and_open_source (const char *filename,
       result = gdb_open_cloexec (fullname->get (), OPEN_MODE, 0);
       if (result >= 0)
 	{
-	  if (basenames_may_differ)
-	    *fullname = gdb_realpath (fullname->get ());
-	  else
-	    *fullname = gdb_abspath (fullname->get ());
+	  *fullname = gdb_realpath (fullname->get ());
 	  return scoped_fd (result);
 	}
 
@@ -1072,12 +1069,9 @@ find_and_open_source (const char *filename,
   if (rewritten_filename != NULL)
     filename = rewritten_filename.get ();
 
-  openp_flags flags = OPF_SEARCH_IN_PATH;
-  if (basenames_may_differ)
-    flags |= OPF_RETURN_REALPATH;
-
   /* Try to locate file using filename.  */
-  result = openp (path, flags, filename, OPEN_MODE, fullname);
+  result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, filename,
+		  OPEN_MODE, fullname);
   if (result < 0 && dirname != NULL)
     {
       /* Remove characters from the start of PATH that we don't need when
@@ -1098,15 +1092,16 @@ find_and_open_source (const char *filename,
       cdir_filename.append (SLASH_STRING);
       cdir_filename.append (filename_start);
 
-      result = openp (path, flags, cdir_filename.c_str (), OPEN_MODE,
-		      fullname);
+      result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH,
+		      cdir_filename.c_str (), OPEN_MODE, fullname);
     }
   if (result < 0)
     {
       /* Didn't work.  Try using just the basename.  */
       p = lbasename (filename);
       if (p != filename)
-	result = openp (path, flags, p, OPEN_MODE, fullname);
+	result = openp (path, OPF_SEARCH_IN_PATH | OPF_RETURN_REALPATH, p,
+			OPEN_MODE, fullname);
     }
 
   return scoped_fd (result);
diff --git a/gdb/testsuite/gdb.base/annotate-symlink.exp b/gdb/testsuite/gdb.base/annotate-symlink.exp
index d22593ca364..830949daa42 100644
--- a/gdb/testsuite/gdb.base/annotate-symlink.exp
+++ b/gdb/testsuite/gdb.base/annotate-symlink.exp
@@ -47,5 +47,8 @@ gdb_breakpoint func message
 
 gdb_test_no_output "set annotate 1"
 
+# The patch to cause this output was reverted.
+# See PR breakpoints/24915.
+setup_xfail *-*-* 24915
 gdb_test "continue" \
     "Breakpoint .* func .*realname-expand-link.c:$decimal\r\n\032\032.*realname-expand-link.c:.*"
-- 
2.21.1