From f086e50e4e5c70f43f9b0f707078694eadc5ccd5 Mon Sep 17 00:00:00 2001 From: Philippe Proulx Date: Sat, 29 Aug 2015 18:32:37 -0400 Subject: [PATCH] Add lttng_event_get_exclusion_name*() to liblttng-ctl MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Signed-off-by: Philippe Proulx Signed-off-by: Jérémie Galarneau --- include/lttng/event.h | 19 +++++++++++ src/lib/lttng-ctl/lttng-ctl.c | 61 +++++++++++++++++++++++++++++++++++ 2 files changed, 80 insertions(+) diff --git a/include/lttng/event.h b/include/lttng/event.h index a85f0f3b5..bf37a1167 100644 --- a/include/lttng/event.h +++ b/include/lttng/event.h @@ -307,6 +307,25 @@ extern int lttng_list_events(struct lttng_handle *handle, extern int lttng_event_get_filter_string(struct lttng_event *event, const char **filter_string); +/* + * Get the number of exclusion names of a specific LTTng event. + * + * Returns the number of exclusion names on success, or a negative + * LTTng error code on error. + */ +extern int lttng_event_get_exclusion_name_count(struct lttng_event *event); + +/* + * Get an LTTng event's exclusion name at a given index. + * + * If the call is successful, then the exclusion name string's address + * is put in *exclusion_name. The caller does NOT own *exclusion_name. + * + * Returns 0 on success, or a negative LTTng error code on error. + */ +extern int lttng_event_get_exclusion_name(struct lttng_event *event, + size_t index, const char **exclusion_name); + /* * List the available tracepoints of a specific lttng domain. * diff --git a/src/lib/lttng-ctl/lttng-ctl.c b/src/lib/lttng-ctl/lttng-ctl.c index 02b3fed4c..c7665922f 100644 --- a/src/lib/lttng-ctl/lttng-ctl.c +++ b/src/lib/lttng-ctl/lttng-ctl.c @@ -1817,6 +1817,67 @@ end: return ret; } +int lttng_event_get_exclusion_name_count(struct lttng_event *event) +{ + int ret; + struct lttcomm_event_extended_header *ext_header; + + if (!event) { + ret = -LTTNG_ERR_INVALID; + goto end; + } + + ext_header = event->extended.ptr; + if (!ext_header) { + /* + * This can happen since the lttng_event structure is + * used for other tasks where this pointer is never set. + */ + ret = 0; + goto end; + } + + if (ext_header->nb_exclusions > INT_MAX) { + ret = -LTTNG_ERR_OVERFLOW; + goto end; + } + ret = (int) ext_header->nb_exclusions; +end: + return ret; +} + +int lttng_event_get_exclusion_name(struct lttng_event *event, + size_t index, const char **exclusion_name) +{ + int ret = 0; + struct lttcomm_event_extended_header *ext_header; + void *at; + + if (!event || !exclusion_name) { + ret = -LTTNG_ERR_INVALID; + goto end; + } + + ext_header = event->extended.ptr; + if (!ext_header) { + ret = -LTTNG_ERR_INVALID; + goto end; + } + + if (index >= ext_header->nb_exclusions) { + ret = -LTTNG_ERR_INVALID; + goto end; + } + + at = (void *) ext_header + sizeof(*ext_header); + at += ext_header->filter_len; + at += index * LTTNG_SYMBOL_NAME_LEN; + *exclusion_name = at; + +end: + return ret; +} + /* * Sets the tracing_group variable with name. * This function allocates memory pointed to by tracing_group. -- 2.34.1