[gdb/record] Support recording of getrandom

Add missing support for recording of linux syscall getrandom.

Tested on x86_64-linux with native and target board unix/-m32.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=22081

1 files changed, 41 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.reverse/getrandom.c b/gdb/testsuite/gdb.reverse/getrandom.c
new file mode 100644
index 0000000..162de6e
--- /dev/null
+++ b/gdb/testsuite/gdb.reverse/getrandom.c
@@ -0,0 +1,41 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2022 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/>.  */
+
+#include <sys/random.h>
+
+void
+marker1 (void)
+{
+}
+
+void
+marker2 (void)
+{
+}
+
+unsigned char buf[6];
+
+int
+main (void)
+{
+  buf[0] = 0xff;
+  buf[5] = 0xff;
+  marker1 ();
+  volatile ssize_t r = getrandom (&buf[1], 4, 0);
+  marker2 ();
+  return 0;
+}