gdbserver: hide fork child threads from GDB

[deliverable/binutils-gdb.git] / gdb / testsuite / gdb.threads / pending-fork-event.c

diff --git a/gdb/testsuite/gdb.threads/pending-fork-event.c b/gdb/testsuite/gdb.threads/pending-fork-event.c
new file mode 100644 (file)
index 0000000..a39ca75
--- /dev/null
+++ b/gdb/testsuite/gdb.threads/pending-fork-event.c
@@ -0,0 +1,82 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2021 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 <pthread.h>
+#include <unistd.h>
+#include <assert.h>
+
+static volatile int release_forking_thread = 0;
+static int x;
+static pthread_barrier_t barrier;
+
+static void
+break_here (void)
+{
+  x++;
+}
+
+static void
+do_fork (void)
+{
+  pthread_barrier_wait (&barrier);
+
+  while (!release_forking_thread);
+
+  if (FORK_FUNCTION () == 0)
+    _exit (0);
+
+}
+
+static void *
+thread_func (void *p)
+{
+#if defined(MAIN_THREAD_FORKS)
+  break_here ();
+#elif defined(OTHER_THREAD_FORKS)
+  do_fork ();
+#else
+# error "MAIN_THREAD_FORKS or OTHER_THREAD_FORKS must be defined"
+#endif
+}
+
+
+int
+main (void)
+{
+  pthread_t thread;
+  int ret;
+
+  pthread_barrier_init (&barrier, NULL, 2);
+
+  alarm (30);
+  ret = pthread_create (&thread, NULL, thread_func, NULL);
+  assert (ret == 0);
+
+  pthread_barrier_wait (&barrier);
+
+#if defined(MAIN_THREAD_FORKS)
+  do_fork ();
+#elif defined(OTHER_THREAD_FORKS)
+  break_here ();
+#else
+# error "MAIN_THREAD_FORKS or OTHER_THREAD_FORKS must be defined"
+#endif
+
+  pthread_join (thread, NULL);
+
+  return 0;
+}