gdb: resume ongoing step after handling fork or vfork

[deliverable/binutils-gdb.git] / gdb / testsuite / gdb.threads / next-fork-other-thread.c

diff --git a/gdb/testsuite/gdb.threads/next-fork-other-thread.c b/gdb/testsuite/gdb.threads/next-fork-other-thread.c
new file mode 100644 (file)
index 0000000..6679f92
--- /dev/null
+++ b/gdb/testsuite/gdb.threads/next-fork-other-thread.c
@@ -0,0 +1,86 @@
+/* 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 <pthread.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <assert.h>
+#include <limits.h>
+
+/* Number of threads doing forks.  */
+#define N_FORKERS 4
+
+static void *
+forker (void *arg)
+{
+  for (;;)
+    {
+      pid_t pid = FORK_FUNC ();
+
+      if (pid == 0)
+       _exit(11);
+
+      assert (pid > 0);
+
+      /* Wait for children to exit.  */
+      int ret;
+      int stat;
+      do {
+        ret = waitpid (pid, &stat, 0);
+      } while (ret == EINTR);
+
+      assert (ret == pid);
+      assert (WIFEXITED (stat));
+      assert (WEXITSTATUS (stat) == 11);
+
+      usleep (40 * 1000);
+    }
+
+  return NULL;
+}
+
+static void
+sleep_a_bit (void)
+{
+  usleep (1000 * 50);
+}
+
+int
+main (void)
+{
+  alarm (60);
+
+  pthread_t thread[N_FORKERS];
+  for (int i = 0; i < N_FORKERS; ++i)
+    {
+      int ret = pthread_create (&thread[i], NULL, forker, NULL);
+      assert (ret == 0);
+    }
+
+  for (int i = 0; i < INT_MAX; ++i) /* for loop */
+    {
+      sleep_a_bit ();  /* break here */
+      sleep_a_bit ();  /* other line */
+    }
+
+  for (int i = 0; i < N_FORKERS; ++i)
+    pthread_join (thread[i], NULL);
+
+  return 0;
+}