| 1 | /* |
| 2 | * Copyright (C) 2019 - Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com> |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This library is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License |
| 11 | * for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU Lesser General Public License |
| 14 | * along with this library; if not, write to the Free Software Foundation, |
| 15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 16 | */ |
| 17 | |
| 18 | #include <lttng/event-rule/event-rule-internal.h> |
| 19 | #include <lttng/event-rule/kretprobe-internal.h> |
| 20 | #include <common/macros.h> |
| 21 | #include <common/error.h> |
| 22 | #include <common/runas.h> |
| 23 | #include <assert.h> |
| 24 | |
| 25 | #define IS_KRETPROBE_EVENT_RULE(rule) ( \ |
| 26 | lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_KRETPROBE \ |
| 27 | ) |
| 28 | |
| 29 | static |
| 30 | void lttng_event_rule_kretprobe_destroy(struct lttng_event_rule *rule) |
| 31 | { |
| 32 | struct lttng_event_rule_kretprobe *kretprobe; |
| 33 | |
| 34 | kretprobe = container_of(rule, struct lttng_event_rule_kretprobe, |
| 35 | parent); |
| 36 | |
| 37 | /* |
| 38 | * TODO |
| 39 | */ |
| 40 | free(kretprobe); |
| 41 | } |
| 42 | |
| 43 | static |
| 44 | bool lttng_event_rule_kretprobe_validate( |
| 45 | const struct lttng_event_rule *rule) |
| 46 | { |
| 47 | /* TODO */ |
| 48 | return false; |
| 49 | } |
| 50 | |
| 51 | static |
| 52 | int lttng_event_rule_kretprobe_serialize( |
| 53 | const struct lttng_event_rule *rule, |
| 54 | struct lttng_dynamic_buffer *buf, int *fd_to_send) |
| 55 | { |
| 56 | /* TODO */ |
| 57 | return -1; |
| 58 | } |
| 59 | |
| 60 | static |
| 61 | bool lttng_event_rule_kretprobe_is_equal(const struct lttng_event_rule *_a, |
| 62 | const struct lttng_event_rule *_b) |
| 63 | { |
| 64 | /* TODO */ |
| 65 | return false; |
| 66 | } |
| 67 | |
| 68 | static |
| 69 | enum lttng_error_code lttng_event_rule_kretprobe_populate(struct lttng_event_rule *rule, uid_t uid, gid_t gid) |
| 70 | { |
| 71 | /* Nothing to do */ |
| 72 | return LTTNG_OK; |
| 73 | } |
| 74 | |
| 75 | static const char *lttng_event_rule_kretprobe_get_filter( |
| 76 | const struct lttng_event_rule *rule) |
| 77 | { |
| 78 | /* Not supported */ |
| 79 | return NULL; |
| 80 | } |
| 81 | |
| 82 | static const struct lttng_filter_bytecode * |
| 83 | lttng_event_rule_kretprobe_get_filter_bytecode( |
| 84 | const struct lttng_event_rule *rule) |
| 85 | { |
| 86 | /* Not supported */ |
| 87 | return NULL; |
| 88 | } |
| 89 | |
| 90 | static struct lttng_event_exclusion * |
| 91 | lttng_event_rule_kretprobe_generate_exclusions(struct lttng_event_rule *rule) |
| 92 | { |
| 93 | /* Not supported */ |
| 94 | return NULL; |
| 95 | } |
| 96 | |
| 97 | struct lttng_event_rule *lttng_event_rule_kretprobe_create() |
| 98 | { |
| 99 | struct lttng_event_rule_kretprobe *rule; |
| 100 | |
| 101 | rule = zmalloc(sizeof(struct lttng_event_rule_kretprobe)); |
| 102 | if (!rule) { |
| 103 | return NULL; |
| 104 | } |
| 105 | |
| 106 | lttng_event_rule_init(&rule->parent, LTTNG_EVENT_RULE_TYPE_KRETPROBE); |
| 107 | rule->parent.validate = lttng_event_rule_kretprobe_validate; |
| 108 | rule->parent.serialize = lttng_event_rule_kretprobe_serialize; |
| 109 | rule->parent.equal = lttng_event_rule_kretprobe_is_equal; |
| 110 | rule->parent.destroy = lttng_event_rule_kretprobe_destroy; |
| 111 | rule->parent.populate = lttng_event_rule_kretprobe_populate; |
| 112 | rule->parent.get_filter = lttng_event_rule_kretprobe_get_filter; |
| 113 | rule->parent.get_filter_bytecode = lttng_event_rule_kretprobe_get_filter_bytecode; |
| 114 | rule->parent.generate_exclusions = lttng_event_rule_kretprobe_generate_exclusions; |
| 115 | return &rule->parent; |
| 116 | } |
| 117 | |
| 118 | LTTNG_HIDDEN |
| 119 | ssize_t lttng_event_rule_kretprobe_create_from_buffer( |
| 120 | const struct lttng_buffer_view *view, |
| 121 | struct lttng_event_rule **_event_rule) |
| 122 | { |
| 123 | /* TODO */ |
| 124 | return -1; |
| 125 | } |
| 126 | |
| 127 | enum lttng_event_rule_status lttng_event_rule_kretprobe_set_source( |
| 128 | struct lttng_event_rule *rule, const char *source) |
| 129 | { |
| 130 | return LTTNG_EVENT_RULE_STATUS_UNSUPPORTED; |
| 131 | } |
| 132 | |
| 133 | enum lttng_event_rule_status lttng_event_rule_kretprobe_set_name( |
| 134 | struct lttng_event_rule *rule, const char *name) |
| 135 | { |
| 136 | return LTTNG_EVENT_RULE_STATUS_UNSUPPORTED; |
| 137 | } |
| 138 | |
| 139 | enum lttng_event_rule_status lttng_event_rule_kretprobe_get_name( |
| 140 | const struct lttng_event_rule *rule, const char **name) |
| 141 | { |
| 142 | return LTTNG_EVENT_RULE_STATUS_UNSUPPORTED; |
| 143 | } |
| 144 | |
| 145 | LTTNG_HIDDEN |
| 146 | uint64_t lttng_event_rule_kretprobe_get_address( |
| 147 | const struct lttng_event_rule *rule) |
| 148 | { |
| 149 | assert("Not implemented" && 0); |
| 150 | } |
| 151 | |
| 152 | LTTNG_HIDDEN |
| 153 | uint64_t lttng_event_rule_kretprobe_get_offset( |
| 154 | const struct lttng_event_rule *rule) |
| 155 | { |
| 156 | assert("Not implemented" && 0); |
| 157 | } |
| 158 | |
| 159 | LTTNG_HIDDEN |
| 160 | const char *lttng_event_rule_kretprobe_get_symbol_name( |
| 161 | const struct lttng_event_rule *rule) |
| 162 | { |
| 163 | assert("Not implemented" && 0); |
| 164 | } |