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+/* Copyright (c) 2018, The Tor Project, Inc. */
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+/* See LICENSE for licensing information */
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+
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+/**
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+ * \file test_mainloop.c
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+ * \brief Tests for functions closely related to the Tor main loop
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+ */
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+
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+#include "test.h"
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+#include "log_test_helpers.h"
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+
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+#include "or.h"
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+#include "main.h"
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+
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+static void
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+test_mainloop_update_time_normal(void *arg)
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+{
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+ (void)arg;
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+
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+ /* This time is in the past as of when this test was written. */
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+ time_t now = 1525272090;
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+ reset_uptime();
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+ update_current_time(now);
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+ tt_int_op(approx_time(), OP_EQ, now);
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+ tt_int_op(get_uptime(), OP_EQ, 0);
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+
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+ update_current_time(now); // Same time as before is a no-op.
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+ tt_int_op(get_uptime(), OP_EQ, 0);
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+
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+ now += 1;
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+ update_current_time(now);
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+ tt_int_op(approx_time(), OP_EQ, now);
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+ tt_int_op(get_uptime(), OP_EQ, 1);
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+
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+ now += 2; // two-second jump is unremarkable.
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+ update_current_time(now);
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+ tt_int_op(approx_time(), OP_EQ, now);
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+ tt_int_op(get_uptime(), OP_EQ, 3);
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+
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+ now -= 1; // a one-second hop backwards is also unremarkable.
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+ update_current_time(now);
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+ tt_int_op(approx_time(), OP_EQ, now); // it changes the approx time...
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+ tt_int_op(get_uptime(), OP_EQ, 3); // but it doesn't roll back our uptime
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+
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+ done:
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+ ;
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+}
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+
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+static void
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+test_mainloop_update_time_jumps(void *arg)
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+{
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+ (void)arg;
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+
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+ /* This time is in the past as of when this test was written. */
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+ time_t now = 220897152;
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+ reset_uptime();
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+ update_current_time(now);
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+ tt_int_op(approx_time(), OP_EQ, now);
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+ tt_int_op(get_uptime(), OP_EQ, 0);
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+
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+ /* Put some uptime on the clock.. */
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+ now += 3;
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+ update_current_time(now);
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+ tt_int_op(approx_time(), OP_EQ, now);
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+ tt_int_op(get_uptime(), OP_EQ, 3);
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+
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+ /* Now try jumping forward. */
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+ setup_capture_of_logs(LOG_NOTICE);
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+ now += 3600;
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+ update_current_time(now);
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+ expect_single_log_msg_containing(
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+ "Your system clock just jumped 3600 seconds forward");
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+ tt_int_op(approx_time(), OP_EQ, now);
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+ tt_int_op(get_uptime(), OP_EQ, 3); // no uptime change.
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+ mock_clean_saved_logs();
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+
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+ now -= 600;
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+ update_current_time(now);
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+ expect_single_log_msg_containing(
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+ "Your system clock just jumped 600 seconds backward");
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+ tt_int_op(approx_time(), OP_EQ, now);
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+ tt_int_op(get_uptime(), OP_EQ, 3); // no uptime change.
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+
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+ /* uptime tracking should go normally now if the clock moves sensibly. */
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+ now += 2;
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+ update_current_time(now);
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+ tt_int_op(approx_time(), OP_EQ, now);
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+ tt_int_op(get_uptime(), OP_EQ, 5);
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+
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+ done:
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+ teardown_capture_of_logs();
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+}
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+
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+#define MAINLOOP_TEST(name) \
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+ { #name, test_mainloop_## name , TT_FORK, NULL, NULL }
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+
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+struct testcase_t mainloop_tests[] = {
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+ MAINLOOP_TEST(update_time_normal),
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+ MAINLOOP_TEST(update_time_jumps),
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+ END_OF_TESTCASES
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+};
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+
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