Re: [PATCH v5 01/30] tools/lib/traceevent: Implement libtraceevent man pages

[Steven Rostedt <rostedt@goodmis.org>]

On Fri, 12 Apr 2019 16:37:42 +0300
Tzvetomir Stoyanov <tstoyanov@vmware.com> wrote:

> --- /dev/null
> +++ b/tools/lib/traceevent/Documentation/libtraceevent.txt
> @@ -0,0 +1,203 @@
> +libtraceevent(3)
> +================
> +
> +NAME
> +----
> +libtraceevent - Linux kernel trace event library
> +
> +SYNOPSIS
> +--------
> +[verse]
> +--
> +*#include <event-parse.h>*
> +
> +Management of tep handler data structure and access of its members:
> +	struct tep_handle pass:[*]*tep_alloc*(void);
> +	void *tep_free*(struct tep_handle pass:[*]_tep_);
> +	void *tep_ref*(struct tep_handle pass:[*]_tep_);
> +	void *tep_unref*(struct tep_handle pass:[*]_tep_);
> +	int *tep_ref_get*(struct tep_handle pass:[*]_tep_);
> +	void *tep_set_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
> +	void *tep_clear_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
> +	bool *tep_test_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flags_);
> +	int *tep_get_cpus*(struct tep_handle pass:[*]_tep_);
> +	void *tep_set_cpus*(struct tep_handle pass:[*]_tep_, int _cpus_);
> +	int *tep_get_long_size*(strucqt tep_handle pass:[*]_tep_);
> +	void *tep_set_long_size*(struct tep_handle pass:[*]_tep_, int _long_size_);
> +	int *tep_get_page_size*(struct tep_handle pass:[*]_tep_);
> +	void *tep_set_page_size*(struct tep_handle pass:[*]_tep_, int _page_size_);
> +	bool *tep_is_latency_format*(struct tep_handle pass:[*]_tep_);
> +	void *tep_set_latency_format*(struct tep_handle pass:[*]_tep_, int _lat_);
> +	int *tep_get_header_page_size*(struct tep_handle pass:[*]_tep_);
> +	int *tep_get_header_timestamp_size*(struct tep_handle pass:[*]_tep_);
> +	bool *tep_is_old_format*(struct tep_handle pass:[*]_tep_);
> +	int *tep_strerror*(struct tep_handle pass:[*]_tep_, enum tep_errno _errnum_, char pass:[*]_buf_, size_t _buflen_);
> +
> +Register / unregister APIs:
> +	int *tep_register_trace_clock*(struct tep_handle pass:[*]_tep_, const char pass:[*]_trace_clock_);
> +	int *tep_register_function*(struct tep_handle pass:[*]_tep_, char pass:[*]_name_, unsigned long long _addr_, char pass:[*]_mod_);
> +	int *tep_register_event_handler*(struct tep_handle pass:[*]_tep_, int _id_, const char pass:[*]_sys_name_, const char pass:[*]_event_name_, tep_event_handler_func _func_, void pass:[*]_context_);
> +	int *tep_unregister_event_handler*(struct tep_handle pass:[*]tep, int id, const char pass:[*]sys_name, const char pass:[*]event_name, tep_event_handler_func func, void pass:[*]_context_);
> +	int *tep_register_print_string*(struct tep_handle pass:[*]_tep_, const char pass:[*]_fmt_, unsigned long long _addr_);
> +	int *tep_register_print_function*(struct tep_handle pass:[*]_tep_, tep_func_handler _func_, enum tep_func_arg_type _ret_type_, char pass:[*]_name_, _..._);
> +	int *tep_unregister_print_function*(struct tep_handle pass:[*]_tep_, tep_func_handler _func_, char pass:[*]_name_);
> +
> +Plugins management:
> +	struct tep_plugin_list pass:[*]*tep_load_plugins*(struct tep_handle pass:[*]_tep_);
> +	void *tep_unload_plugins*(struct tep_plugin_list pass:[*]_plugin_list_, struct tep_handle pass:[*]_tep_);
> +	char pass:[*]pass:[*]*tep_plugin_list_options*(void);
> +	void *tep_plugin_free_options_list*(char pass:[*]pass:[*]_list_);
> +	int *tep_plugin_add_options*(const char pass:[*]_name_, struct tep_plugin_option pass:[*]_options_);
> +	void *tep_plugin_remove_options*(struct tep_plugin_option pass:[*]_options_);
> +	void *tep_print_plugins*(struct trace_seq pass:[*]_s_, const char pass:[*]_prefix_, const char pass:[*]_suffix_, const struct tep_plugin_list pass:[*]_list_);
> +
> +Event related APIs:
> +	struct tep_event pass:[*]*tep_get_event*(struct tep_handle pass:[*]_tep_, int _index_);
> +	struct tep_event pass:[*]*tep_get_first_event*(struct tep_handle pass:[*]_tep_);
> +	int *tep_get_events_count*(struct tep_handle pass:[*]_tep_);
> +	struct tep_event pass:[*]pass:[*]*tep_list_events*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_);
> +	struct tep_event pass:[*]pass:[*]*tep_list_events_copy*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_);
> +
> +Event printing:
> +	void *tep_print_event*(struct tep_handle pass:[*]_tep_, struct trace_seq pass:[*]_s_, struct tep_record pass:[*]_record_, bool _use_trace_clock_);
> +	void *tep_print_event_data*(struct tep_handle pass:[*]_tep_, struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, struct tep_record pass:[*]_record_);
> +	void *tep_event_info*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, struct tep_record pass:[*]_record_);
> +	void *tep_print_event_task*(struct tep_handle pass:[*]_tep_, struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, struct tep_record pass:[*]_record_);
> +	void *tep_print_event_time*(struct tep_handle pass:[*]_tep_, struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, struct tep_record pass:[*]record, bool _use_trace_clock_);
> +	void *tep_set_print_raw*(struct tep_handle pass:[*]_tep_, int _print_raw_);
> +
> +Event finding:
> +	struct tep_event pass:[*]*tep_find_event*(struct tep_handle pass:[*]_tep_, int _id_);
> +	struct tep_event pass:[*]*tep_find_event_by_name*(struct tep_handle pass:[*]_tep_, const char pass:[*]_sys_, const char pass:[*]_name_);
> +	struct tep_event pass:[*]*tep_find_event_by_record*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_record_);
> +
> +Parsing of event files:
> +	int *tep_parse_header_page*(struct tep_handle pass:[*]_tep_, char pass:[*]_buf_, unsigned long _size_, int _long_size_);
> +	enum tep_errno *tep_parse_event*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
> +	enum tep_errno *tep_parse_format*(struct tep_handle pass:[*]_tep_, struct tep_event pass:[*]pass:[*]_eventp_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
> +
> +APIs related to fields from event's format files:
> +	struct tep_format_field pass:[*]pass:[*]*tep_event_common_fields*(struct tep_event pass:[*]_event_);
> +	struct tep_format_field pass:[*]pass:[*]*tep_event_fields*(struct tep_event pass:[*]_event_);
> +	void pass:[*]*tep_get_field_raw*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int pass:[*]_len_, int _err_);
> +	int *tep_get_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
> +	int *tep_get_common_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
> +	int *tep_get_any_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
> +	int *tep_read_number_field*(struct tep_format_field pass:[*]_field_, const void pass:[*]_data_, unsigned long long pass:[*]_value_);
> +
> +Event fileds printing:

s/fileds/fields/

> +	void *tep_print_field*(struct trace_seq pass:[*]_s_, void pass:[*]_data_, struct tep_format_field pass:[*]_field_);
> +	void *tep_print_fields*(struct trace_seq pass:[*]_s_, void pass:[*]_data_, int _size_, struct tep_event pass:[*]_event_);
> +	int *tep_print_num_field*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int _err_);
> +	int *tep_print_func_field*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int _err_);
> +
> +Event fileds finding:

Same.

> +	struct tep_format_field pass:[*]*tep_find_common_field*(struct tep_event pass:[*]_event_, const char pass:[*]_name_);
> +	struct tep_format_field pass:[*]*tep_find_field*(struct tep_event_ormat pass:[*]_event_, const char pass:[*]_name_);
> +	struct tep_format_field pass:[*]*tep_find_any_field*(struct tep_event pass:[*]_event_, const char pass:[*]_name_);
> +
> +Functions resolver:
> +	int *tep_set_function_resolver*(struct tep_handle pass:[*]_tep_, tep_func_resolver_t pass:[*]_func_, void pass:[*]_priv_);
> +	void *tep_reset_function_resolver*(struct tep_handle pass:[*]_tep_);
> +	const char pass:[*]*tep_find_function*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
> +	unsigned long long *tep_find_function_address*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
> +
> +Filter management:
> +	struct tep_event_filter pass:[*]*tep_filter_alloc*(struct tep_handle pass:[*]_tep_);
> +	enum tep_errno *tep_filter_add_filter_str*(struct tep_event_filter pass:[*]_filter_, const char pass:[*]_filter_str_);
> +	enum tep_errno *tep_filter_match*(struct tep_event_filter pass:[*]_filter_, struct tep_record pass:[*]_record_);
> +	int *tep_filter_strerror*(struct tep_event_filter pass:[*]_filter_, enum tep_errno _err_, char pass:[*]buf, size_t _buflen_);
> +	int *tep_event_filtered*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
> +	void *tep_filter_reset*(struct tep_event_filter pass:[*]_filter_);
> +	void *tep_filter_free*(struct tep_event_filter pass:[*]_filter_);
> +	char pass:[*]*tep_filter_make_string*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
> +	int *tep_filter_remove_event*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
> +	int *tep_filter_copy*(struct tep_event_filter pass:[*]_dest_, struct tep_event_filter pass:[*]_source_);
> +	int *tep_filter_compare*(struct tep_event_filter pass:[*]_filter1_, struct tep_event_filter pass:[*]_filter2_);
> +
> +Parsing various data from the records:
> +	void *tep_data_latency_format*(struct tep_handle pass:[*]_tep_, struct trace_seq pass:[*]_s_, struct tep_record pass:[*]_record_);
> +	int *tep_data_type*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
> +	int *tep_data_pid*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
> +	int *tep_data_preempt_count*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
> +	int *tep_data_flags*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
> +
> +Command and task related APIs:
> +	const char pass:[*]*tep_data_comm_from_pid*(struct tep_handle pass:[*]_tep_, int _pid_);
> +	struct cmdline pass:[*]*tep_data_pid_from_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, struct cmdline pass:[*]_next_);
> +	int *tep_register_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, int _pid_);
> +	int *tep_override_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, int _pid_);
> +	bool *tep_is_pid_registered*(struct tep_handle pass:[*]_tep_, int _pid_);
> +	int *tep_cmdline_pid*(struct tep_handle pass:[*]_tep_, struct cmdline pass:[*]_cmdline_);
> +
> +Endian related APIs:
> +	int *tep_is_bigendian*(void);
> +	unsigned long long *tep_read_number*(struct tep_handle pass:[*]_tep_, const void pass:[*]_ptr_, int _size_);
> +	bool *tep_is_file_bigendian*(struct tep_handle pass:[*]_tep_);
> +	void *tep_set_file_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_);
> +	bool *tep_is_local_bigendian*(struct tep_handle pass:[*]_tep_);
> +	void *tep_set_local_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_);
> +
> +Trace sequences:
> +*#include <trace-seq.h>*
> +	void *trace_seq_init*(struct trace_seq pass:[*]_s_);
> +	void *trace_seq_reset*(struct trace_seq pass:[*]_s_);
> +	void *trace_seq_destroy*(struct trace_seq pass:[*]_s_);
> +	int *trace_seq_printf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, ...);
> +	int *trace_seq_vprintf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, va_list _args_);
> +	int *trace_seq_puts*(struct trace_seq pass:[*]_s_, const char pass:[*]_str_);
> +	int *trace_seq_putc*(struct trace_seq pass:[*]_s_, unsigned char _c_);
> +	void *trace_seq_terminate*(struct trace_seq pass:[*]_s_);
> +	int *trace_seq_do_fprintf*(struct trace_seq pass:[*]_s_, FILE pass:[*]_fp_);
> +	int *trace_seq_do_printf*(struct trace_seq pass:[*]_s_);
> +--
> +
> +DESCRIPTION
> +-----------
> +The libtraceevent(3) library provides APIs to access kernel tracepoint events,
> +located in the debugfs file system under the tracing/events directory.

tracefs file system. It's not in debugfs anymore.

-- Steve


> +
> +ENVIRONMENT
> +-----------
> +[verse]
> +--
> +TRACEEVENT_PLUGIN_DIR
> +	Additional plugin directory. All shared object files, located in this directory will be loaded as traceevent plugins.
> +--
> +
> +FILES
> +-----
> +[verse]
> +--
> +*event-parse.h*
> +	Header file to include in order to have access to the library APIs.
> +*trace-seq.h*
> +	Header file to include in order to have access to trace sequences related APIs.
> +	Trace sequences are used to allow a function to call several other functions
> +	to create a string of data to use.
> +*-ltraceevent*
> +	Linker switch to add when building a program that uses the library.
> +--
> +
> +SEE ALSO
> +--------
> +_trace-cmd(1)_
> +
> +AUTHOR
> +------
> +[verse]
> +--
> +*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
> +*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
> +--
> +REPORTING BUGS
> +--------------
> +Report bugs to  <linux-trace-devel@vger.kernel.org>
> +
> +LICENSE
> +-------
> +libtraceevent is Free Software licensed under the GNU LGPL 2.1
> +
> +RESOURCES
> +---------
>