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From: "Tzvetomir Stoyanov (VMware)" <>
Subject: [PATCH 2/2] tools lib traceevent: Man page libtraceevent debug APIs
Date: Tue, 29 Sep 2020 20:36:46 +0300
Message-ID: <> (raw)

Add a new libtraceevent man page with documentation of these debug APIs:

Signed-off-by: Tzvetomir Stoyanov (VMware) <>
 .../Documentation/libtraceevent-debug.txt     | 95 +++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-debug.txt

diff --git a/tools/lib/traceevent/Documentation/libtraceevent-debug.txt b/tools/lib/traceevent/Documentation/libtraceevent-debug.txt
new file mode 100644
index 000000000000..9a2d1ffa2d72
--- /dev/null
+++ b/tools/lib/traceevent/Documentation/libtraceevent-debug.txt
@@ -0,0 +1,95 @@
+tep_print_printk, tep_print_funcs, tep_set_test_filters, tep_plugin_print_options -
+Print libtraceevent internal information.
+*#include <event-parse.h>*
+*#include <trace-seq.h>*
+void *tep_print_printk*(struct tep_handle pass:[*]tep);
+void *tep_print_funcs*(struct tep_handle pass:[*]tep);
+void *tep_set_test_filters*(struct tep_handle pass:[*]tep, int test_filters);
+void *tep_plugin_print_options*(struct trace_seq pass:[*]s);
+The _tep_print_printk()_ function prints the printk string formats that were
+stored for this tracing session. The _tep_ argument is trace event parser context.
+The _tep_print_funcs()_ function prints the stored function name to address mapping
+for this tracing session. The _tep_ argument is trace event parser context.
+The _tep_set_test_filters()_ function sets a flag to test a filter string. If this
+flag is set, when _tep_filter_add_filter_str()_ API as called, it will print the filter
+string instead of adding it. The _tep_ argument is trace event parser context.
+The _test_filters_ argument is the test flag that will be set.
+The _tep_plugin_print_options()_ function writes a list of the registered plugin options
+into _s_.
+#include <event-parse.h>
+#include <trace-seq.h>
+struct tep_handle *tep = tep_alloc();
+	tep_print_printk(tep);
+	tep_print_funcs(tep);
+struct tep_event_filter *filter = tep_filter_alloc(tep);
+	tep_set_test_filters(tep, 1);
+	tep_filter_add_filter_str(filter, "sche	d/sched_wakeup:target_cpu==1");
+	tep_set_test_filters(tep, 0);
+	tep_filter_free(filter);
+struct trace_seq seq;
+	tep_plugin_print_options(&s);
+	Header file to include in order to have access to the library APIs.
+	Linker switch to add when building a program that uses the library.
+_libtraceevent(3)_, _trace-cmd(1)_
+*Steven Rostedt* <>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <>, author of this man page.
+Report bugs to  <>
+libtraceevent is Free Software licensed under the GNU LGPL 2.1

             reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-29 17:36 Tzvetomir Stoyanov (VMware) [this message]
2020-09-29 22:00 ` Steven Rostedt
  -- strict thread matches above, loose matches on Subject: below --
2020-09-24  8:57 Tzvetomir Stoyanov (VMware)

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