include/lttng/event-rule/kernel-kprobe.h

   1 /*
   2  * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #ifndef LTTNG_EVENT_RULE_KERNEL_KPROBE_H
   9 #define LTTNG_EVENT_RULE_KERNEL_KPROBE_H
  10
  11 #include <lttng/event-rule/event-rule.h>
  12 #include <lttng/lttng-export.h>
  13
  14 #ifdef __cplusplus
  15 extern "C" {
  16 #endif
  17
  18 struct lttng_kernel_probe_location;
  19
  20 /*
  21  * Create a newly allocated kernel kprobe event rule.
  22  *
  23  * The location is copied internally.
  24  *
  25  * Returns a new event rule on success, NULL on failure. The returned event rule
  26  * must be destroyed using lttng_event_rule_destroy().
  27  */
  28 LTTNG_EXPORT extern struct lttng_event_rule *lttng_event_rule_kernel_kprobe_create(
  29                 const struct lttng_kernel_probe_location *location);
  30
  31 /*
  32  * Get the kernel probe location of a kernel kprobe event rule.
  33  *
  34  * The caller does not assume the ownership of the returned location.
  35  * The location shall only be used for the duration of the event
  36  * rule's lifetime, or before a different location is set.
  37  *
  38  * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's location
  39  * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
  40  * passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a location was not set prior to
  41  * this call.
  42  */
  43 LTTNG_EXPORT extern enum lttng_event_rule_status lttng_event_rule_kernel_kprobe_get_location(
  44                 const struct lttng_event_rule *rule,
  45                 const struct lttng_kernel_probe_location **location);
  46
  47 /*
  48  * Set the name of a kernel kprobe event rule.
  49  *
  50  * The name is copied internally.
  51  *
  52  * Returns LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
  53  * if invalid parameters are passed.
  54  */
  55 LTTNG_EXPORT extern enum lttng_event_rule_status lttng_event_rule_kernel_kprobe_set_event_name(
  56                 struct lttng_event_rule *rule, const char *name);
  57
  58 /*
  59  * Get the name of a kernel kprobe event rule.
  60  *
  61  * The caller does not assume the ownership of the returned name.
  62  * The name shall only only be used for the duration of the event
  63  * rule's lifetime, or before a different name is set.
  64  *
  65  * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's name on
  66  * success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is passed,
  67  * or LTTNG_EVENT_RULE_STATUS_UNSET if a name was not set prior to this call.
  68  */
  69 LTTNG_EXPORT extern enum lttng_event_rule_status lttng_event_rule_kernel_kprobe_get_event_name(
  70                 const struct lttng_event_rule *rule, const char **name);
  71
  72 #ifdef __cplusplus
  73 }
  74 #endif
  75
  76 #endif /* LTTNG_EVENT_RULE_KERNEL_KPROBE_H */