tep_print_printk - Man Page

Print libtraceevent internal information.

Synopsis

#include <event-parse.h>
#include <trace-seq.h>

void tep_print_printk(struct tep_handle *tep);
void tep_print_funcs(struct tep_handle *tep);
void tep_set_test_filters(struct tep_handle *tep, int test_filters);
void tep_plugin_print_options(struct trace_seq *s);

Description

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.

Example

#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, "sched/sched_wakeup:target_cpu==1");
        tep_set_test_filters(tep, 0);
        tep_filter_free(filter);
...
struct trace_seq seq;
trace_seq_init(&seq);

        tep_plugin_print_options(&s);
...

Files

event-parse.h
        Header file to include in order to have access to the library APIs.
-ltraceevent
        Linker switch to add when building a program that uses the library.

See Also

libtraceevent(3), trace-cmd(1)

Author

Steven Rostedt <rostedt@goodmis.org[1]>, author of libtraceevent.
Tzvetomir Stoyanov <tz.stoyanov@gmail.com[2]>, author of this man page.

Reporting Bugs

Report bugs to <linux-trace-devel@vger.kernel.org[3]>

License

libtraceevent is Free Software licensed under the GNU LGPL 2.1

Resources

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

Notes

  1. rostedt@goodmis.org
    mailto:rostedt@goodmis.org
  2. tz.stoyanov@gmail.com
    mailto:tz.stoyanov@gmail.com
  3. linux-trace-devel@vger.kernel.org
    mailto:linux-trace-devel@vger.kernel.org

Referenced By

The man pages tep_plugin_print_options(3), tep_print_funcs(3) and tep_set_test_filters(3) are aliases of tep_print_printk(3).

02/08/2021 libtraceevent 1.1.1 libtraceevent Manual