106 lines
2.3 KiB
Plaintext
106 lines
2.3 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_event_common_fields, tep_event_fields - Get a list of fields for an event.
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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_format_field pass:[*]pass:[*]*tep_event_common_fields*(struct tep_event pass:[*]_event_);
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struct tep_format_field pass:[*]pass:[*]*tep_event_fields*(struct tep_event pass:[*]_event_);
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--
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DESCRIPTION
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-----------
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The _tep_event_common_fields()_ function returns an array of pointers to common
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fields for the _event_. The array is allocated in the function and must be freed
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by free(). The last element of the array is NULL.
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The _tep_event_fields()_ function returns an array of pointers to event specific
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fields for the _event_. The array is allocated in the function and must be freed
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by free(). The last element of the array is NULL.
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RETURN VALUE
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------------
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Both _tep_event_common_fields()_ and _tep_event_fields()_ functions return
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an array of pointers to tep_format_field structures in case of success, or
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NULL in case of an error.
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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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int i;
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struct tep_format_field **fields;
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struct tep_event *event = tep_find_event_by_name(tep, "kvm", "kvm_exit");
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if (event != NULL) {
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fields = tep_event_common_fields(event);
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if (fields != NULL) {
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i = 0;
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while (fields[i]) {
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/*
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walk through the list of the common fields
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of the kvm_exit event
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*/
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i++;
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}
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free(fields);
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}
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fields = tep_event_fields(event);
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if (fields != NULL) {
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i = 0;
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while (fields[i]) {
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/*
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walk through the list of the event specific
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fields of the kvm_exit event
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*/
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i++;
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}
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free(fields);
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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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