X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fevent-rule%2Fuprobe.c;fp=src%2Fcommon%2Fevent-rule%2Fuprobe.c;h=0000000000000000000000000000000000000000;hp=b8f8edee5f7171eb531d26b286f48b7d0a828d05;hb=e957bf98e634c79b13281d0a2fe144be0245d310;hpb=1f1567a534b09badcbe6f6c10a4693e9fddb62dc diff --git a/src/common/event-rule/uprobe.c b/src/common/event-rule/uprobe.c deleted file mode 100644 index b8f8edee5..000000000 --- a/src/common/event-rule/uprobe.c +++ /dev/null @@ -1,437 +0,0 @@ -/* - * Copyright (C) 2019 Jonathan Rajotte - * - * SPDX-License-Identifier: LGPL-2.1-only - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define IS_UPROBE_EVENT_RULE(rule) \ - (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_USERSPACE_PROBE) - -static void lttng_event_rule_userspace_probe_destroy(struct lttng_event_rule *rule) -{ - struct lttng_event_rule_userspace_probe *uprobe; - - uprobe = container_of(rule, struct lttng_event_rule_userspace_probe, parent); - - lttng_userspace_probe_location_destroy(uprobe->location); - free(uprobe->name); - free(uprobe); -} - -static bool lttng_event_rule_userspace_probe_validate( - const struct lttng_event_rule *rule) -{ - bool valid = false; - struct lttng_event_rule_userspace_probe *uprobe; - - if (!rule) { - goto end; - } - - uprobe = container_of(rule, struct lttng_event_rule_userspace_probe, parent); - - /* Required field. */ - if (!uprobe->name) { - ERR("Invalid uprobe event rule: a pattern must be set."); - goto end; - } - - if (!uprobe->location) { - ERR("Invalid uprobe event rule: a location must be set."); - goto end; - } - - valid = true; -end: - return valid; -} - -static int lttng_event_rule_userspace_probe_serialize( - const struct lttng_event_rule *rule, - struct lttng_payload *payload) -{ - int ret; - size_t name_len, header_offset, size_before_probe; - struct lttng_event_rule_userspace_probe *uprobe; - struct lttng_event_rule_userspace_probe_comm uprobe_comm = {}; - struct lttng_event_rule_userspace_probe_comm *header; - - if (!rule || !IS_UPROBE_EVENT_RULE(rule)) { - ret = -1; - goto end; - } - - header_offset = payload->buffer.size; - - DBG("Serializing uprobe event rule."); - uprobe = container_of(rule, struct lttng_event_rule_userspace_probe, parent); - - name_len = strlen(uprobe->name) + 1; - - uprobe_comm.name_len = name_len; - - ret = lttng_dynamic_buffer_append( - &payload->buffer, &uprobe_comm, sizeof(uprobe_comm)); - if (ret) { - goto end; - } - ret = lttng_dynamic_buffer_append( - &payload->buffer, uprobe->name, name_len); - if (ret) { - goto end; - } - - size_before_probe = payload->buffer.size; - - /* This serialize return the size taken in the buffer. */ - ret = lttng_userspace_probe_location_serialize( - uprobe->location, payload); - if (ret < 0) { - goto end; - } - - /* Update the header regarding the probe size. */ - header = (struct lttng_event_rule_userspace_probe_comm - *) ((char *) payload->buffer.data + - header_offset); - header->location_len = payload->buffer.size - size_before_probe; - - ret = 0; - -end: - return ret; -} - -static bool lttng_event_rule_userspace_probe_is_equal(const struct lttng_event_rule *_a, - const struct lttng_event_rule *_b) -{ - bool is_equal = false; - struct lttng_event_rule_userspace_probe *a, *b; - - a = container_of(_a, struct lttng_event_rule_userspace_probe, parent); - b = container_of(_b, struct lttng_event_rule_userspace_probe, parent); - - /* uprobe is invalid if this is not true. */ - assert(a->name); - assert(b->name); - if (strcmp(a->name, b->name)) { - goto end; - } - - assert(a->location); - assert(b->location); - is_equal = lttng_userspace_probe_location_is_equal( - a->location, b->location); -end: - return is_equal; -} - -static enum lttng_error_code lttng_event_rule_userspace_probe_generate_filter_bytecode( - struct lttng_event_rule *rule, - const struct lttng_credentials *creds) -{ - /* Nothing to do. */ - return LTTNG_OK; -} - -static const char *lttng_event_rule_userspace_probe_get_filter( - const struct lttng_event_rule *rule) -{ - /* Unsupported. */ - return NULL; -} - -static const struct lttng_bytecode * -lttng_event_rule_userspace_probe_get_filter_bytecode(const struct lttng_event_rule *rule) -{ - /* Unsupported. */ - return NULL; -} - -static enum lttng_event_rule_generate_exclusions_status -lttng_event_rule_userspace_probe_generate_exclusions(const struct lttng_event_rule *rule, - struct lttng_event_exclusion **exclusions) -{ - /* Unsupported. */ - *exclusions = NULL; - return LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; -} - -static unsigned long -lttng_event_rule_userspace_probe_hash( - const struct lttng_event_rule *rule) -{ - unsigned long hash; - struct lttng_event_rule_userspace_probe *urule = - container_of(rule, typeof(*urule), parent); - - hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_USERSPACE_PROBE, - lttng_ht_seed); - hash ^= hash_key_str(urule->name, lttng_ht_seed); - hash ^= lttng_userspace_probe_location_hash(urule->location); - - return hash; -} - -struct lttng_event_rule *lttng_event_rule_userspace_probe_create(void) -{ - struct lttng_event_rule *rule = NULL; - struct lttng_event_rule_userspace_probe *urule; - - urule = zmalloc(sizeof(struct lttng_event_rule_userspace_probe)); - if (!urule) { - goto end; - } - - rule = &urule->parent; - lttng_event_rule_init(&urule->parent, LTTNG_EVENT_RULE_TYPE_USERSPACE_PROBE); - urule->parent.validate = lttng_event_rule_userspace_probe_validate; - urule->parent.serialize = lttng_event_rule_userspace_probe_serialize; - urule->parent.equal = lttng_event_rule_userspace_probe_is_equal; - urule->parent.destroy = lttng_event_rule_userspace_probe_destroy; - urule->parent.generate_filter_bytecode = - lttng_event_rule_userspace_probe_generate_filter_bytecode; - urule->parent.get_filter = lttng_event_rule_userspace_probe_get_filter; - urule->parent.get_filter_bytecode = - lttng_event_rule_userspace_probe_get_filter_bytecode; - urule->parent.generate_exclusions = - lttng_event_rule_userspace_probe_generate_exclusions; - urule->parent.hash = lttng_event_rule_userspace_probe_hash; - -end: - return rule; -} - -LTTNG_HIDDEN -ssize_t lttng_event_rule_userspace_probe_create_from_payload( - struct lttng_payload_view *view, - struct lttng_event_rule **_event_rule) -{ - ssize_t ret, offset = 0; - const struct lttng_event_rule_userspace_probe_comm *uprobe_comm; - const char *name; - struct lttng_buffer_view current_buffer_view; - struct lttng_event_rule *rule = NULL; - struct lttng_userspace_probe_location *location; - struct lttng_event_rule_userspace_probe *uprobe; - enum lttng_event_rule_status status; - - if (!_event_rule) { - ret = -1; - goto end; - } - - current_buffer_view = lttng_buffer_view_from_view( - &view->buffer, offset, sizeof(*uprobe_comm)); - if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { - ERR("Failed to initialize from malformed event rule uprobe: buffer too short to contain header"); - ret = -1; - goto end; - } - - uprobe_comm = (typeof(uprobe_comm)) current_buffer_view.data; - rule = lttng_event_rule_userspace_probe_create(); - if (!rule) { - ERR("Failed to create event rule uprobe"); - ret = -1; - goto end; - } - - /* Skip to payload. */ - offset += current_buffer_view.size; - - /* Map the name. */ - current_buffer_view = lttng_buffer_view_from_view( - &view->buffer, offset, uprobe_comm->name_len); - if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { - ret = -1; - goto end; - } - - name = current_buffer_view.data; - if (!lttng_buffer_view_contains_string(¤t_buffer_view, name, - uprobe_comm->name_len)) { - ret = -1; - goto end; - } - - /* Skip after the name. */ - offset += uprobe_comm->name_len; - - /* Map the location. */ - { - struct lttng_payload_view current_payload_view = - lttng_payload_view_from_view(view, offset, - uprobe_comm->location_len); - - if (!lttng_payload_view_is_valid(¤t_payload_view)) { - ERR("Failed to initialize from malformed event rule uprobe: buffer too short to contain location"); - ret = -1; - goto end; - } - - ret = lttng_userspace_probe_location_create_from_payload( - ¤t_payload_view, &location); - if (ret < 0) { - ret = -1; - goto end; - } - } - - assert(ret == uprobe_comm->location_len); - - /* Skip after the location. */ - offset += uprobe_comm->location_len; - - uprobe = container_of(rule, struct lttng_event_rule_userspace_probe, parent); - uprobe->location = location; - - status = lttng_event_rule_userspace_probe_set_name(rule, name); - if (status != LTTNG_EVENT_RULE_STATUS_OK) { - ret = -1; - goto end; - } - - if (!lttng_event_rule_userspace_probe_validate(rule)) { - ret = -1; - goto end; - } - - *_event_rule = rule; - rule = NULL; - ret = offset; -end: - lttng_event_rule_destroy(rule); - return ret; -} - -enum lttng_event_rule_status lttng_event_rule_userspace_probe_set_location( - struct lttng_event_rule *rule, - const struct lttng_userspace_probe_location *location) -{ - struct lttng_userspace_probe_location *location_copy = NULL; - struct lttng_event_rule_userspace_probe *uprobe; - enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; - - if (!rule || !IS_UPROBE_EVENT_RULE(rule) || !location) { - status = LTTNG_EVENT_RULE_STATUS_INVALID; - goto end; - } - - uprobe = container_of(rule, struct lttng_event_rule_userspace_probe, parent); - location_copy = lttng_userspace_probe_location_copy(location); - if (!location_copy) { - status = LTTNG_EVENT_RULE_STATUS_ERROR; - goto end; - } - - if (uprobe->location) { - lttng_userspace_probe_location_destroy(uprobe->location); - } - - uprobe->location = location_copy; - location_copy = NULL; -end: - lttng_userspace_probe_location_destroy(location_copy); - return status; -} - -enum lttng_event_rule_status lttng_event_rule_userspace_probe_get_location( - const struct lttng_event_rule *rule, - const struct lttng_userspace_probe_location **location) -{ - enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; - - if (!rule || !IS_UPROBE_EVENT_RULE(rule) || !location) { - status = LTTNG_EVENT_RULE_STATUS_INVALID; - goto end; - } - - *location = lttng_event_rule_userspace_probe_get_location_mutable(rule); - if (!*location) { - status = LTTNG_EVENT_RULE_STATUS_UNSET; - goto end; - } - -end: - return status; -} - -LTTNG_HIDDEN -struct lttng_userspace_probe_location * -lttng_event_rule_userspace_probe_get_location_mutable( - const struct lttng_event_rule *rule) -{ - struct lttng_event_rule_userspace_probe *uprobe; - - assert(rule); - uprobe = container_of(rule, struct lttng_event_rule_userspace_probe, parent); - - return uprobe->location; -} - -enum lttng_event_rule_status lttng_event_rule_userspace_probe_set_name( - struct lttng_event_rule *rule, const char *name) -{ - char *name_copy = NULL; - struct lttng_event_rule_userspace_probe *uprobe; - enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; - - if (!rule || !IS_UPROBE_EVENT_RULE(rule) || !name || - strlen(name) == 0) { - status = LTTNG_EVENT_RULE_STATUS_INVALID; - goto end; - } - - uprobe = container_of(rule, struct lttng_event_rule_userspace_probe, parent); - name_copy = strdup(name); - if (!name_copy) { - status = LTTNG_EVENT_RULE_STATUS_ERROR; - goto end; - } - - if (uprobe->name) { - free(uprobe->name); - } - - uprobe->name = name_copy; - name_copy = NULL; -end: - return status; -} - -enum lttng_event_rule_status lttng_event_rule_userspace_probe_get_name( - const struct lttng_event_rule *rule, const char **name) -{ - struct lttng_event_rule_userspace_probe *uprobe; - enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; - - if (!rule || !IS_UPROBE_EVENT_RULE(rule) || !name) { - status = LTTNG_EVENT_RULE_STATUS_INVALID; - goto end; - } - - uprobe = container_of(rule, struct lttng_event_rule_userspace_probe, parent); - if (!uprobe->name) { - status = LTTNG_EVENT_RULE_STATUS_UNSET; - goto end; - } - - *name = uprobe->name; -end: - return status; -}