tests/thread: Add tests for running GC within a thread, and heap stress.

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/thread/thread_gc1.py b/tests/thread/thread_gc1.py
new file mode 100644
index 000000000..8dcbf7e07
--- /dev/null
+++ b/tests/thread/thread_gc1.py
@@ -0,0 +1,34 @@
+# test that we can run the garbage collector within threads
+#
+# MIT license; Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
+
+import gc
+import _thread
+
+def thread_entry(n):
+    # allocate a bytearray and fill it
+    data = bytearray(i for i in range(256))
+
+    # do some work and call gc.collect() a few times
+    for i in range(n):
+        for i in range(len(data)):
+            data[i] = data[i]
+        gc.collect()
+
+    # print whether the data remains intact and indicate we are finished
+    with lock:
+        print(list(data) == list(range(256)))
+        global n_finished
+        n_finished += 1
+
+lock = _thread.allocate_lock()
+n_thread = 4
+n_finished = 0
+
+# spawn threads
+for i in range(n_thread):
+    _thread.start_new_thread(thread_entry, (10,))
+
+# busy wait for threads to finish
+while n_finished < n_thread:
+    pass