gprof: Copy a simple test from glibc

Copy a simple gprof test from glibc to test the basic gprof functionality.

1. Tested natively on Linux/x86-64 and Linux/i686.
2. Tested for the x86_64-solaris cross target without cross-compiler.
3. Tested for the aarch64-linux-gnu cross target with cross-compiler.

	PR gprof/32764
	* Makefile.am (SUBDIRS): Add testsuite
	* configure.ac (AC_CONFIG_FILES): Removed.
	(AC_OUTPUT): Add Makefile testsuite/Makefile
	po/Makefile.in:po/Make-in.
	(AM_CONDITIONAL): Add NATIVE.
	* Makefile.in: Regenerated.
	* configure: Likewise.
	* testsuite/Makefile.am: New file.
	* testsuite/tst-gmon-gprof.sh: Likewise.
	* testsuite/tst-gmon.c: Likewise.
	* testsuite/Makefile.in: Generated.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/gprof/testsuite/tst-gmon.c b/gprof/testsuite/tst-gmon.c
new file mode 100644
index 0000000..add2d92
--- /dev/null
+++ b/gprof/testsuite/tst-gmon.c
@@ -0,0 +1,55 @@
+/* Test program for profiling information collection (_mcount/gprof).
+   Copyright (C) 2017-2025 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <sys/cdefs.h>
+
+/* This program does not use the test harness because we want tight
+   control over the call graph.  */
+
+__attribute__ ((weak))
+void
+f1 (void)
+{
+}
+
+__attribute__ ((weak))
+void
+f2 (void)
+{
+  f1 ();
+  /* Prevent tail call.  */
+  asm volatile ("");
+}
+
+__attribute__ ((weak))
+void
+f3 (int count)
+{
+  for (int i = 0; i < count; ++i)
+    {
+      f1 ();
+      f2 ();
+    }
+}
+
+int
+main (void)
+{
+  f3 (1000);
+  return 0;
+}