[PATCH 5/5] gdb: add a selftest for elfnote-file.c

[Mihails Strasuns]

Verifies that the previous two commits work in sync by first generating
a dummy file mappings buffer and validating its contents using iteration
utility right after that.

gdb/ChangeLog:
2021-01-02  Mihails Strasuns  <mihails.strasuns@intel.com>

	* unittests/elfnote-file.c: New file.
---
 gdb/Makefile.in              |  1 +
 gdb/unittests/elfnote-file.c | 98 ++++++++++++++++++++++++++++++++++++
 2 files changed, 99 insertions(+)
 create mode 100644 gdb/unittests/elfnote-file.c

diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 25de9dd008..82b1e3ec1c 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -441,6 +441,7 @@ SELFTESTS_SRCS = \
 	unittests/command-def-selftests.c \
 	unittests/common-utils-selftests.c \
 	unittests/copy_bitwise-selftests.c \
+	unittests/elfnote-file.c \
 	unittests/enum-flags-selftests.c \
 	unittests/environ-selftests.c \
 	unittests/filtered_iterator-selftests.c \
diff --git a/gdb/unittests/elfnote-file.c b/gdb/unittests/elfnote-file.c
new file mode 100644
index 0000000000..5b600b8a47
--- /dev/null
+++ b/gdb/unittests/elfnote-file.c
@@ -0,0 +1,98 @@
+/* Self tests for ELF NT_FILE builder/iterator.
+
+   Copyright (C) 2021 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   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/>.  */
+
+#include "gdbsupport/common-defs.h"
+#include "gdbsupport/selftest.h"
+#include "selftest-arch.h"
+#include "elfnote-file.h"
+#include "arch-utils.h"
+
+namespace selftests {
+
+static void
+test_write_into_read ()
+{
+  // Create some long type
+  struct gdbarch_info info;
+  gdbarch_info_init (&info);
+  info.bfd_arch_info = bfd_scan_arch ("linux");
+  struct gdbarch *arch = gdbarch_find_by_info (info);
+  SELF_CHECK (arch != NULL);
+  type* long_type = arch_integer_type (arch, gdbarch_long_bit (arch),
+				       0, "long");
+
+  // Generate mappings
+  file_mappings_builder builder(long_type);
+  builder.add ({10, 20, 30, "first"})
+	 .add ({100, 200, 300, "second"})
+	 .add ({30, 20, 10, "third"});
+  auto mappings = builder.build ();
+  SELF_CHECK (mappings.size () > 0);
+
+  // Iterate and validate mappings
+  bool pre_cb_called = false;
+  int cb_called_count = 0;
+  iterate_file_mappings(&mappings, long_type,
+  			[&] (int count)
+			  {
+			    pre_cb_called = true;
+			    SELF_CHECK (count == 3);
+			  },
+			[&] (int i, const file_mapping& item)
+			  {
+			    ++cb_called_count;
+			    switch (i)
+			      {
+				case 0:
+				  SELF_CHECK (item.vaddr == 10);
+				  SELF_CHECK (item.size == 20);
+				  SELF_CHECK (item.offset == 30);
+				  SELF_CHECK (strcmp(item.filename, "first") == 0);
+				  break;
+				case 1:
+				  SELF_CHECK (item.vaddr == 100);
+				  SELF_CHECK (item.size == 200);
+				  SELF_CHECK (item.offset == 300);
+				  SELF_CHECK (strcmp(item.filename, "second") == 0);
+				  break;
+				case 2:
+				  SELF_CHECK (item.vaddr == 30);
+				  SELF_CHECK (item.size == 20);
+				  SELF_CHECK (item.offset == 10);
+				  SELF_CHECK (strcmp(item.filename, "third") == 0);
+				  break;
+				default:
+				  SELF_CHECK (false);
+			      }
+			  });
+
+  SELF_CHECK (pre_cb_called);
+  SELF_CHECK (cb_called_count == 3);
+}
+
+} /* namespace selftests */
+
+void _initialize_elfnote_file_selftests ();
+void
+_initialize_elfnote_file_selftests ()
+{
+  selftests::register_test
+    ("elfnote-file", selftests::test_write_into_read);
+
+}
-- 
2.17.1

Intel Deutschland GmbH
Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany
Tel: +49 89 99 8853-0, www.intel.de
Managing Directors: Christin Eisenschmid, Gary Kershaw
Chairperson of the Supervisory Board: Nicole Lau
Registered Office: Munich
Commercial Register: Amtsgericht Muenchen HRB 186928