SoW-2019-0002: Dynamic Snapshot

[lttng-tools.git] / include / lttng / event-rule / syscall.h

diff --git a/include/lttng/event-rule/syscall.h b/include/lttng/event-rule/syscall.h
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+++ b/include/lttng/event-rule/syscall.h
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+/*
+ * Copyright (C) 2019 - Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License, version 2.1 only,
+ * as published by the Free Software Foundation.
+ *
+ * This library 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 Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef LTTNG_EVENT_RULE_SYSCALL_H
+#define LTTNG_EVENT_RULE_SYSCALL_H
+
+#include <lttng/event-rule/event-rule.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * TODO:
+ */
+extern struct lttng_event_rule *lttng_event_rule_syscall_create(void);
+
+/*
+ * Set the pattern of a syscall event rule.
+ *
+ * Pattern can contains wildcard '*'. See man lttng-enable-event.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_syscall_set_pattern(
+               struct lttng_event_rule *rule, const char *pattern);
+
+/*
+ * Get the pattern of a tracecpoint event rule.
+ *
+ * The caller does not assume the ownership of the returned pattern. The
+ * pattern shall only only be used for the duration of the event rule's
+ * lifetime, or before a different pattern is set.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's pattern
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid
+ * parameter is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a pattern
+ * was not set prior to this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_syscall_get_pattern(
+               const struct lttng_event_rule *rule, const char **pattern);
+
+/*
+ * Set the filter expression of a syscall event rule.
+ *
+ * The expression is copied.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_syscall_set_filter(
+               struct lttng_event_rule *rule, const char *expression);
+
+/*
+ * Get the filter expression of a syscall event rule.
+ *
+ * The caller does not assume the ownership of the returned filter expression.
+ * The filter expression shall only only be used for the duration of the event
+ * rule's lifetime, or before a different filter expression is set.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's filter
+ * expression on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid
+ * parameter is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a filter expression
+ * was not set prior to this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_syscall_get_filter(
+               const struct lttng_event_rule *rule, const char **expression);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LTTNG_EVENT_RULE_H */