104 lines
2.4 KiB
Plaintext
104 lines
2.4 KiB
Plaintext
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libtraceevent(3)
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================
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NAME
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----
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tep_find_event,tep_find_event_by_name,tep_find_event_by_record -
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Find events by given key.
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SYNOPSIS
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--------
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[verse]
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--
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*#include <event-parse.h>*
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struct tep_event pass:[*]*tep_find_event*(struct tep_handle pass:[*]_tep_, int _id_);
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struct tep_event pass:[*]*tep_find_event_by_name*(struct tep_handle pass:[*]_tep_, const char pass:[*]_sys_, const char pass:[*]_name_);
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struct tep_event pass:[*]*tep_find_event_by_record*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_record_);
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--
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DESCRIPTION
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-----------
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This set of functions can be used to search for an event, based on a given
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criteria. All functions require a pointer to a _tep_, trace event parser
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context.
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The _tep_find_event()_ function searches for an event by given event _id_. The
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event ID is assigned dynamically and can be viewed in event's format file,
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"ID" field.
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The tep_find_event_by_name()_ function searches for an event by given
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event _name_, under the system _sys_. If the _sys_ is NULL (not specified),
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the first event with _name_ is returned.
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The tep_find_event_by_record()_ function searches for an event from a given
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_record_.
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RETURN VALUE
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------------
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All these functions return a pointer to the found event, or NULL if there is no
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such event.
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EXAMPLE
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-------
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[source,c]
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--
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#include <event-parse.h>
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...
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struct tep_handle *tep = tep_alloc();
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...
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struct tep_event *event;
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event = tep_find_event(tep, 1857);
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if (event == NULL) {
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/* There is no event with ID 1857 */
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}
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event = tep_find_event_by_name(tep, "kvm", "kvm_exit");
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if (event == NULL) {
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/* There is no kvm_exit event, from kvm system */
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}
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void event_from_record(struct tep_record *record)
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{
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struct tep_event *event = tep_find_event_by_record(tep, record);
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if (event == NULL) {
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/* There is no event from given record */
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}
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}
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...
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--
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FILES
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-----
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[verse]
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--
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*event-parse.h*
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Header file to include in order to have access to the library APIs.
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*-ltraceevent*
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Linker switch to add when building a program that uses the library.
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--
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SEE ALSO
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--------
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_libtraceevent(3)_, _trace-cmd(1)_
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AUTHOR
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------
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[verse]
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--
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*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
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*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
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--
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REPORTING BUGS
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--------------
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Report bugs to <linux-trace-devel@vger.kernel.org>
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LICENSE
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-------
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libtraceevent is Free Software licensed under the GNU LGPL 2.1
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RESOURCES
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---------
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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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