193 lines
11 KiB
Plaintext
193 lines
11 KiB
Plaintext
libtraceevent(3)
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================
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NAME
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----
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libtraceevent - Linux kernel trace event library
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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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Management of tep handler data structure and access of its members:
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struct tep_handle pass:[*]*tep_alloc*(void);
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void *tep_free*(struct tep_handle pass:[*]_tep_);
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void *tep_ref*(struct tep_handle pass:[*]_tep_);
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void *tep_unref*(struct tep_handle pass:[*]_tep_);
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int *tep_get_ref*(struct tep_handle pass:[*]_tep_);
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void *tep_set_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
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void *tep_clear_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
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bool *tep_test_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flags_);
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int *tep_get_cpus*(struct tep_handle pass:[*]_tep_);
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void *tep_set_cpus*(struct tep_handle pass:[*]_tep_, int _cpus_);
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int *tep_get_long_size*(strucqt tep_handle pass:[*]_tep_);
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void *tep_set_long_size*(struct tep_handle pass:[*]_tep_, int _long_size_);
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int *tep_get_page_size*(struct tep_handle pass:[*]_tep_);
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void *tep_set_page_size*(struct tep_handle pass:[*]_tep_, int _page_size_);
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int *tep_get_header_page_size*(struct tep_handle pass:[*]_tep_);
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int *tep_get_header_timestamp_size*(struct tep_handle pass:[*]_tep_);
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bool *tep_is_old_format*(struct tep_handle pass:[*]_tep_);
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int *tep_strerror*(struct tep_handle pass:[*]_tep_, enum tep_errno _errnum_, char pass:[*]_buf_, size_t _buflen_);
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Register / unregister APIs:
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int *tep_register_function*(struct tep_handle pass:[*]_tep_, char pass:[*]_name_, unsigned long long _addr_, char pass:[*]_mod_);
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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_);
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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_);
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int *tep_register_print_string*(struct tep_handle pass:[*]_tep_, const char pass:[*]_fmt_, unsigned long long _addr_);
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int *tep_register_print_function*(struct tep_handle pass:[*]_tep_, tep_func_handler _func_, enum tep_func_arg_type _ret_type_, char pass:[*]_name_, _..._);
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int *tep_unregister_print_function*(struct tep_handle pass:[*]_tep_, tep_func_handler _func_, char pass:[*]_name_);
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Plugins management:
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struct tep_plugin_list pass:[*]*tep_load_plugins*(struct tep_handle pass:[*]_tep_);
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void *tep_unload_plugins*(struct tep_plugin_list pass:[*]_plugin_list_, struct tep_handle pass:[*]_tep_);
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char pass:[*]pass:[*]*tep_plugin_list_options*(void);
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void *tep_plugin_free_options_list*(char pass:[*]pass:[*]_list_);
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int *tep_plugin_add_options*(const char pass:[*]_name_, struct tep_plugin_option pass:[*]_options_);
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void *tep_plugin_remove_options*(struct tep_plugin_option pass:[*]_options_);
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void *tep_print_plugins*(struct trace_seq pass:[*]_s_, const char pass:[*]_prefix_, const char pass:[*]_suffix_, const struct tep_plugin_list pass:[*]_list_);
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Event related APIs:
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struct tep_event pass:[*]*tep_get_event*(struct tep_handle pass:[*]_tep_, int _index_);
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struct tep_event pass:[*]*tep_get_first_event*(struct tep_handle pass:[*]_tep_);
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int *tep_get_events_count*(struct tep_handle pass:[*]_tep_);
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struct tep_event pass:[*]pass:[*]*tep_list_events*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_);
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struct tep_event pass:[*]pass:[*]*tep_list_events_copy*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_);
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void *tep_print_event*(struct tep_handle pass:[*]_tep_, struct trace_seq pass:[*]_s_, struct tep_record pass:[*]_record_, const char pass:[*]_fmt_, _..._);
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Event finding:
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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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Parsing of event files:
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int *tep_parse_header_page*(struct tep_handle pass:[*]_tep_, char pass:[*]_buf_, unsigned long _size_, int _long_size_);
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enum tep_errno *tep_parse_event*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
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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_);
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APIs related to fields from event's format files:
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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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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_);
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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_);
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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_);
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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_);
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int *tep_read_number_field*(struct tep_format_field pass:[*]_field_, const void pass:[*]_data_, unsigned long long pass:[*]_value_);
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Event fields printing:
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void *tep_print_field*(struct trace_seq pass:[*]_s_, void pass:[*]_data_, struct tep_format_field pass:[*]_field_);
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void *tep_print_fields*(struct trace_seq pass:[*]_s_, void pass:[*]_data_, int _size_, struct tep_event pass:[*]_event_);
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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_);
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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_);
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Event fields finding:
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struct tep_format_field pass:[*]*tep_find_common_field*(struct tep_event pass:[*]_event_, const char pass:[*]_name_);
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struct tep_format_field pass:[*]*tep_find_field*(struct tep_event_ormat pass:[*]_event_, const char pass:[*]_name_);
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struct tep_format_field pass:[*]*tep_find_any_field*(struct tep_event pass:[*]_event_, const char pass:[*]_name_);
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Functions resolver:
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int *tep_set_function_resolver*(struct tep_handle pass:[*]_tep_, tep_func_resolver_t pass:[*]_func_, void pass:[*]_priv_);
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void *tep_reset_function_resolver*(struct tep_handle pass:[*]_tep_);
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const char pass:[*]*tep_find_function*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
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unsigned long long *tep_find_function_address*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
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Filter management:
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struct tep_event_filter pass:[*]*tep_filter_alloc*(struct tep_handle pass:[*]_tep_);
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enum tep_errno *tep_filter_add_filter_str*(struct tep_event_filter pass:[*]_filter_, const char pass:[*]_filter_str_);
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enum tep_errno *tep_filter_match*(struct tep_event_filter pass:[*]_filter_, struct tep_record pass:[*]_record_);
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int *tep_filter_strerror*(struct tep_event_filter pass:[*]_filter_, enum tep_errno _err_, char pass:[*]buf, size_t _buflen_);
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int *tep_event_filtered*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
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void *tep_filter_reset*(struct tep_event_filter pass:[*]_filter_);
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void *tep_filter_free*(struct tep_event_filter pass:[*]_filter_);
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char pass:[*]*tep_filter_make_string*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
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int *tep_filter_remove_event*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
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int *tep_filter_copy*(struct tep_event_filter pass:[*]_dest_, struct tep_event_filter pass:[*]_source_);
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int *tep_filter_compare*(struct tep_event_filter pass:[*]_filter1_, struct tep_event_filter pass:[*]_filter2_);
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Parsing various data from the records:
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int *tep_data_type*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
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int *tep_data_pid*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
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int *tep_data_preempt_count*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
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int *tep_data_flags*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
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Command and task related APIs:
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const char pass:[*]*tep_data_comm_from_pid*(struct tep_handle pass:[*]_tep_, int _pid_);
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struct cmdline pass:[*]*tep_data_pid_from_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, struct cmdline pass:[*]_next_);
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int *tep_register_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, int _pid_);
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int *tep_override_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, int _pid_);
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bool *tep_is_pid_registered*(struct tep_handle pass:[*]_tep_, int _pid_);
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int *tep_cmdline_pid*(struct tep_handle pass:[*]_tep_, struct cmdline pass:[*]_cmdline_);
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Endian related APIs:
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int *tep_is_bigendian*(void);
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unsigned long long *tep_read_number*(struct tep_handle pass:[*]_tep_, const void pass:[*]_ptr_, int _size_);
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bool *tep_is_file_bigendian*(struct tep_handle pass:[*]_tep_);
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void *tep_set_file_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_);
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bool *tep_is_local_bigendian*(struct tep_handle pass:[*]_tep_);
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void *tep_set_local_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_);
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Trace sequences:
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*#include <trace-seq.h>*
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void *trace_seq_init*(struct trace_seq pass:[*]_s_);
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void *trace_seq_reset*(struct trace_seq pass:[*]_s_);
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void *trace_seq_destroy*(struct trace_seq pass:[*]_s_);
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int *trace_seq_printf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, ...);
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int *trace_seq_vprintf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, va_list _args_);
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int *trace_seq_puts*(struct trace_seq pass:[*]_s_, const char pass:[*]_str_);
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int *trace_seq_putc*(struct trace_seq pass:[*]_s_, unsigned char _c_);
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void *trace_seq_terminate*(struct trace_seq pass:[*]_s_);
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int *trace_seq_do_fprintf*(struct trace_seq pass:[*]_s_, FILE pass:[*]_fp_);
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int *trace_seq_do_printf*(struct trace_seq pass:[*]_s_);
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--
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DESCRIPTION
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-----------
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The libtraceevent(3) library provides APIs to access kernel tracepoint events,
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located in the tracefs file system under the events directory.
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ENVIRONMENT
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-----------
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[verse]
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--
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TRACEEVENT_PLUGIN_DIR
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Additional plugin directory. All shared object files, located in this directory will be loaded as traceevent plugins.
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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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*trace-seq.h*
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Header file to include in order to have access to trace sequences related APIs.
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Trace sequences are used to allow a function to call several other functions
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to create a string of data to use.
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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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_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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