tests: add integ test for SIGBUS/SIGSEGV handling

The test checks that Firecracker logs the appropriate mesage
when intercepting the signal.
Exit code is not checked because, as the jailer clones into a
new pid namespace, it's no longer in the test process' tree
and its pid cannot be waited on.

Signed-off-by: Alexandra Iordache <[email protected]>

Author: Alexandra Iordache

tests/integration_tests/functional/test_signals.py

@@ -0,0 +1,51 @@
+# Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+"""Tests scenarios for Firecracker signal handling."""
+
+import os
+from signal import SIGBUS, SIGSEGV
+from time import sleep
+
+import pytest
+
+import host_tools.logging as log_tools
+
+
+@pytest.mark.parametrize(
+    "signum",
+    [SIGBUS, SIGSEGV]
+)
+def test_sigbus(test_microvm_with_api, signum):
+    """Test reboot from guest kernel."""
+    test_microvm = test_microvm_with_api
+    test_microvm.spawn()
+
+    # We don't need to monitor the memory for this test.
+    test_microvm.memory_events_queue = None
+
+    test_microvm.basic_config()
+
+    # Configure logging.
+    log_fifo_path = os.path.join(test_microvm.path, 'log_fifo')
+    metrics_fifo_path = os.path.join(test_microvm.path, 'metrics_fifo')
+    log_fifo = log_tools.Fifo(log_fifo_path)
+    metrics_fifo = log_tools.Fifo(metrics_fifo_path)
+
+    response = test_microvm.logger.put(
+        log_fifo=test_microvm.create_jailed_resource(log_fifo.path),
+        metrics_fifo=test_microvm.create_jailed_resource(metrics_fifo.path),
+        level='Error',
+        show_level=False,
+        show_log_origin=False
+    )
+    assert test_microvm.api_session.is_status_no_content(response.status_code)
+
+    test_microvm.start()
+    firecracker_pid = int(test_microvm.jailer_clone_pid)
+
+    sleep(0.5)
+    os.kill(firecracker_pid, signum)
+
+    msg = 'Shutting down VM after intercepting signal {}'.format(signum)
+    lines = log_fifo.sequential_reader(3)
+    assert msg in lines[1]