SoW-2019-0007-2: Dynamic Snapshot: Triggers send partial event payload with notifications

[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..9a77a82
--- /dev/null
+++ b/src/common/event-rule/kretprobe.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <assert.h>
+#include <common/error.h>
+#include <common/macros.h>
+#include <common/runas.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/kretprobe-internal.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_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);
+}