SoW-2019-0002: Dynamic Snapshot

[lttng-tools.git] / src / common / event-rule-kretprobe.c

diff --git a/src/common/event-rule-kretprobe.c b/src/common/event-rule-kretprobe.c
new file mode 100644 (file)
index 0000000..56916d9
--- /dev/null
+++ b/src/common/event-rule-kretprobe.c
@@ -0,0 +1,164 @@
+/*
+ * 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
+ */
+
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/kretprobe-internal.h>
+#include <common/macros.h>
+#include <common/error.h>
+#include <common/runas.h>
+#include <assert.h>
+
+#define IS_KRETPROBE_EVENT_RULE(rule) ( \
+       lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_KRETPROBE \
+       )
+
+static
+void lttng_event_rule_kretprobe_destroy(struct lttng_event_rule *rule)
+{
+       struct lttng_event_rule_kretprobe *kretprobe;
+
+       kretprobe = container_of(rule, struct lttng_event_rule_kretprobe,
+                       parent);
+
+       /*
+        * TODO
+        */
+       free(kretprobe);
+}
+
+static
+bool lttng_event_rule_kretprobe_validate(
+               const struct lttng_event_rule *rule)
+{
+       /* TODO */
+       return false;
+}
+
+static
+int lttng_event_rule_kretprobe_serialize(
+               const struct lttng_event_rule *rule,
+               struct lttng_dynamic_buffer *buf, int *fd_to_send)
+{
+       /* TODO */
+       return -1;
+}
+
+static
+bool lttng_event_rule_kretprobe_is_equal(const struct lttng_event_rule *_a,
+               const struct lttng_event_rule *_b)
+{
+       /* TODO */
+       return false;
+}
+
+static
+enum lttng_error_code lttng_event_rule_kretprobe_populate(struct lttng_event_rule *rule, uid_t uid, gid_t gid)
+{
+       /* Nothing to do */
+       return LTTNG_OK;
+}
+
+static const char *lttng_event_rule_kretprobe_get_filter(
+               const struct lttng_event_rule *rule)
+{
+       /* Not supported */
+       return NULL;
+}
+
+static const struct lttng_filter_bytecode *
+lttng_event_rule_kretprobe_get_filter_bytecode(
+               const struct lttng_event_rule *rule)
+{
+       /* Not supported */
+       return NULL;
+}
+
+static struct lttng_event_exclusion *
+lttng_event_rule_kretprobe_generate_exclusions(struct lttng_event_rule *rule)
+{
+       /* Not supported */
+       return NULL;
+}
+
+struct lttng_event_rule *lttng_event_rule_kretprobe_create()
+{
+       struct lttng_event_rule_kretprobe *rule;
+
+       rule = zmalloc(sizeof(struct lttng_event_rule_kretprobe));
+       if (!rule) {
+               return NULL;
+       }
+
+       lttng_event_rule_init(&rule->parent, LTTNG_EVENT_RULE_TYPE_KRETPROBE);
+       rule->parent.validate = lttng_event_rule_kretprobe_validate;
+       rule->parent.serialize = lttng_event_rule_kretprobe_serialize;
+       rule->parent.equal = lttng_event_rule_kretprobe_is_equal;
+       rule->parent.destroy = lttng_event_rule_kretprobe_destroy;
+       rule->parent.populate = lttng_event_rule_kretprobe_populate;
+       rule->parent.get_filter = lttng_event_rule_kretprobe_get_filter;
+       rule->parent.get_filter_bytecode = lttng_event_rule_kretprobe_get_filter_bytecode;
+       rule->parent.generate_exclusions = lttng_event_rule_kretprobe_generate_exclusions;
+       return &rule->parent;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_event_rule_kretprobe_create_from_buffer(
+               const struct lttng_buffer_view *view,
+               struct lttng_event_rule **_event_rule)
+{
+       /* TODO */
+       return -1;
+}
+
+enum lttng_event_rule_status lttng_event_rule_kretprobe_set_source(
+               struct lttng_event_rule *rule, const char *source)
+{
+       return LTTNG_EVENT_RULE_STATUS_UNSUPPORTED;
+}
+
+enum lttng_event_rule_status lttng_event_rule_kretprobe_set_name(
+               struct lttng_event_rule *rule, const char *name)
+{
+       return LTTNG_EVENT_RULE_STATUS_UNSUPPORTED;
+}
+
+enum lttng_event_rule_status lttng_event_rule_kretprobe_get_name(
+               const struct lttng_event_rule *rule, const char **name)
+{
+       return LTTNG_EVENT_RULE_STATUS_UNSUPPORTED;
+}
+
+LTTNG_HIDDEN
+uint64_t lttng_event_rule_kretprobe_get_address(
+               const struct lttng_event_rule *rule)
+{
+       assert("Not implemented" && 0);
+}
+
+LTTNG_HIDDEN
+uint64_t lttng_event_rule_kretprobe_get_offset(
+               const struct lttng_event_rule *rule)
+{
+       assert("Not implemented" && 0);
+}
+
+LTTNG_HIDDEN
+const char *lttng_event_rule_kretprobe_get_symbol_name(
+               const struct lttng_event_rule *rule)
+{
+       assert("Not implemented" && 0);
+}