1libtracefs(3) 2============= 3 4NAME 5---- 6libtracefs - Linux kernel trace file system library 7 8SYNOPSIS 9-------- 10[verse] 11-- 12*#include <tracefs.h>* 13 14Locations of tracing files and directories: 15 char pass:[*]*tracefs_get_tracing_file*(const char pass:[*]_name_); 16 void *tracefs_put_tracing_file*(char pass:[*]_name_); 17 const char pass:[*]*tracefs_tracing_dir*(void); 18 const char pass:[*]*tracefs_debug_dir*(void); 19 int *tracefs_set_tracing_dir*(char pass:[*]_tracing_dir_) 20 int *tracefs_tracing_dir_is_mounted*(bool _mount_, const char pass:[**]_path_); 21 22Trace instances: 23 struct tracefs_instance pass:[*]*tracefs_instance_create*(const char pass:[*]_name_); 24 int *tracefs_instance_destroy*(struct tracefs_instance pass:[*]_instance_); 25 struct tracefs_instance pass:[*]*tracefs_instance_alloc*(const char pass:[*]_tracing_dir_, const char pass:[*]_name_); 26 void *tracefs_instance_free*(struct tracefs_instance pass:[*]_instance_); 27 char pass:[**]*tracefs_instances*(const char pass:[*]_regex_); 28 bool *tracefs_instance_is_new*(struct tracefs_instance pass:[*]_instance_); 29 bool *tracefs_file_exists*(struct tracefs_instance pass:[*]_instance_, char pass:[*]_name_); 30 bool *tracefs_dir_exists*(struct tracefs_instance pass:[*]_instance_, char pass:[*]_name_); 31 char pass:[*]*tracefs_instance_get_file*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_file_); 32 char pass:[*]*tracefs_instance_get_dir*(struct tracefs_instance pass:[*]_instance_); 33 int *tracefs_instance_file_open*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_file_, int _mode_); 34 int *tracefs_instance_file_write*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_file_, const char pass:[*]_str_); 35 int *tracefs_instance_file_append*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_file_, const char pass:[*]_str_); 36 int *tracefs_instance_file_clear*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_file_); 37 char pass:[*]*tracefs_instance_file_read*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_file_, int pass:[*]_psize_); 38 int *tracefs_instance_file_read_number*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_file_, long long int pass:[*]_res_); 39 const char pass:[*]*tracefs_instance_get_name*(struct tracefs_instance pass:[*]_instance_); 40 const char pass:[*]*tracefs_instance_get_trace_dir*(struct tracefs_instance pass:[*]_instance_); 41 int *tracefs_instances_walk*(int (pass:[*]_callback_)(const char pass:[*], void pass:[*]), void pass:[*]_context)_; 42 bool *tracefs_instance_exists*(const char pass:[*]_name_); 43 int *tracefs_instance_set_affinity*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_cpu_str_); 44 int *tracefs_instance_set_affinity_set*(struct tracefs_instance pass:[*]_instance_, cpu_set_t pass:[*]_set_, size_t _set_size_); 45 int *tracefs_instance_set_affinity_raw*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_mask_); 46 char pass:[*]*tracefs_instance_get_affinity*(struct tracefs_instance pass:[*]_instance_); 47 int *tracefs_instance_get_affinity_set*(struct tracefs_instance pass:[*]_instance_, cpu_set_t pass:[*]_set_, size_t _set_size_); 48 char pass:[*]*tracefs_instance_get_affinity_raw*(struct tracefs_instance pass:[*]_instance_); 49 size_t *tracefs_instance_get_buffer_size*(struct tracefs_instance pass:[*]_instance_, int _cpu_); 50 int *tracefs_instance_set_buffer_size*(struct tracefs_instance pass:[*]_instance_, size_t _size_, int _cpu_); 51 52Trace events: 53 char pass:[*]pass:[*]*tracefs_event_systems*(const char pass:[*]_tracing_dir_); 54 char pass:[*]pass:[*]*tracefs_system_events*(const char pass:[*]_tracing_dir_, const char pass:[*]_system_); 55 int *tracefs_event_enable*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_system_, 56 const char pass:[*]_event_); 57 int *tracefs_event_disable*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_system_, 58 const char pass:[*]_event_); 59 enum tracefs_enable_state *tracefs_event_is_enabled*(struct tracefs_instance pass:[*]_instance_, 60 const char pass:[*]_system_, const char pass:[*]_event_); 61 int *tracefs_iterate_raw_events*(struct tep_handle pass:[*]_tep_, struct tracefs_instance pass:[*]_instance_, cpu_set_t pass:[*]_cpus_, int _cpu_size_, int (pass:[*]_callback_)(struct tep_event pass:[*], struct tep_record pass:[*], int, void pass:[*]), void pass:[*]_callback_context_); 62 void *tracefs_iterate_stop*(struct tracefs_instance pass:[*]_instance_); 63 int *tracefs_follow_event*(struct tep_handle pass:[*]_tep_, struct tracefs_instance pass:[*]_instance_, 64 const char pass:[*]_system_, const char pass:[*]_event_name_, 65 int (pass:[*]_callback_)(struct tep_event pass:[*], 66 struct tep_record pass:[*], 67 int, void pass:[*]), 68 void pass:[*]_callback_data_); 69 int *tracefs_follow_missed_events*(struct tracefs_instance pass:[*]_instance_, 70 int (pass:[*]_callback_)(struct tep_event pass:[*], 71 struct tep_record pass:[*], 72 int, void pass:[*]), 73 void pass:[*]_callback_data_); 74 struct tep_handle pass:[*]*tracefs_local_events*(const char pass:[*]_tracing_dir_); 75 struct tep_handle pass:[*]*tracefs_local_events_system*(const char pass:[*]_tracing_dir_, const char pass:[*] const pass:[*]_sys_names_); 76 int *tracefs_fill_local_events*(const char pass:[*]_tracing_dir_, struct tep_handle pass:[*]_tep_, int pass:[*]_parsing_failures_); 77 int *tracefs_load_cmdlines*(const char pass:[*]_tracing_dir_, struct tep_handle pass:[*]_tep_); 78 char pass:[*]*tracefs_event_get_file*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_system_, const char pass:[*]_event_, 79 const char pass:[*]_file_); 80 char pass:[*]*tracefs_event_file_read*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_system_, const char pass:[*]_event_, 81 const char pass:[*]_file_, int pass:[*]_psize_); 82 int *tracefs_event_file_write*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_system_, const char pass:[*]_event_, 83 const char pass:[*]_file_, const char pass:[*]_str_); 84 int *tracefs_event_file_append*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_system_, const char pass:[*]_event_, 85 const char pass:[*]_file_, const char pass:[*]_str_); 86 int *tracefs_event_file_clear*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_system_, const char pass:[*]_event_, 87 const char pass:[*]_file_); 88 bool *tracefs_event_file_exists*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_system_, const char pass:[*]_event_, 89 90Event filters: 91 int *tracefs_filter_string_append*(struct tep_event pass:[*]_event_, char pass:[**]_filter_, 92 struct tracefs_filter _type_, const char pass:[*]_field_, 93 enum tracefs_synth_compare _compare_, const char pass:[*]_val_); 94 int *tracefs_filter_string_verify*(struct tep_event pass:[*]_event_, const char pass:[*]_filter_, char pass:[**]_err_); 95 int *tracefs_event_filter_apply*(struct tracefs_instance pass:[*]_instance_, struct tep_event pass:[*]_event_, const char pass:[*]_filter_); 96 int *tracefs_event_filter_clear*(struct tracefs_instance pass:[*]_instance_, struct tep_event pass:[*]_event_); 97 98Function filters: 99 int *tracefs_function_filter*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_filter_, const char pass:[*]_module_, int _flags_); 100 int *tracefs_function_notrace*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_filter_, const char pass:[*]_module_, int _flags_); 101 int *tracefs_filter_functions*(const char pass:[*]_filter_, const char pass:[*]_module_, char pass:[*]pass:[*]pass:[*]_list_); 102 103Trace helper functions: 104 void *tracefs_list_free*(char pass:[*]pass:[*]_list_); 105 char pass:[**]*tracefs_list_add*(char **_list_, const char *_string_); 106 int *tracefs_list_size*(char pass:[**]_list_); 107 char pass:[*]*tracefs_get_clock*(struct tracefs_instance pass:[*]_instance_); 108 int *tracefs_trace_is_on*(struct tracefs_instance pass:[*]_instance_); 109 int *tracefs_trace_on*(struct tracefs_instance pass:[*]_instance_); 110 int *tracefs_trace_off*(struct tracefs_instance pass:[*]_instance_); 111 int *tracefs_trace_on_get_fd*(struct tracefs_instance pass:[*]_instance_); 112 int *tracefs_trace_on_fd*(int _fd_); 113 int *tracefs_trace_off_fd*(int _fd_); 114 115Trace stream: 116 ssize_t *tracefs_trace_pipe_stream*(int _fd_, struct tracefs_instance pass:[*]_instance_, int _flags_); 117 ssize_t *tracefs_trace_pipe_print*(struct tracefs_instance pass:[*]_instance_, int _flags_); 118 void *tracefs_trace_pipe_stop*(struct tracefs_instance pass:[*]_instance_); 119 120Trace options: 121 const struct tracefs_options_mask pass:[*]*tracefs_options_get_supported*(struct tracefs_instance pass:[*]_instance_); 122 bool *tracefs_option_is_supported*(struct tracefs_instance pass:[*]_instance_, enum tracefs_option_id _id_); 123 const struct tracefs_options_mask pass:[*]*tracefs_options_get_enabled*(struct tracefs_instance pass:[*]_instance_); 124 bool *tracefs_option_is_enabled*(struct tracefs_instance pass:[*]_instance_, enum tracefs_option_id _id_); 125 bool *tracefs_option_mask_is_set*(const struct tracefs_options_mask *options, enum tracefs_option_id id); 126 int *tracefs_option_enable*(struct tracefs_instance pass:[*]_instance_, enum tracefs_option_id _id_); 127 int *tracefs_option_disable*(struct tracefs_instance pass:[*]_instance_, enum tracefs_option_id _id_); 128 const char pass:[*]*tracefs_option_name*(enum tracefs_option_id _id_); 129 enum tracefs_option_id *tracefs_option_id*(const char pass:[*]_name_); 130 131Ftrace tracers: 132 char pass:[*]pass:[*]*tracefs_tracers*(const char pass:[*]_tracing_dir_); 133 bool *tracefs_tracer_available*(const char pass:[*]_tracing_dir_, const char pass:[*]_tracer_); 134 int *tracefs_tracer_set*(struct tracefs_instance pass:[*]_instance_, enum tracefs_tracers _tracer_); 135 int *tracefs_tracer_set*(struct tracefs_instance pass:[*]_instance_, enum tracefs_tracers _tracer_, const char pass:[*]_name_); 136 int *tracefs_tracer_clear*(struct tracefs_instance pass:[*]_instance_); 137 138Writing data in the trace buffer: 139 int *tracefs_print_init*(struct tracefs_instance pass:[*]_instance_); 140 int *tracefs_printf*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_fmt_, _..._); 141 int *tracefs_vprintf*(struct tracefs_instance pass:[*]_instance_, const char pass:[*]_fmt_, va_list _ap_); 142 void *tracefs_print_close*(struct tracefs_instance pass:[*]_instance_); 143 int *tracefs_binary_init*(struct tracefs_instance pass:[*]_instance_); 144 int *tracefs_binary_write*(struct tracefs_instance pass:[*]_instance_, void pass:[*]_data_, int _len_); 145 void *tracefs_binary_close*(struct tracefs_instance pass:[*]_instance_); 146 147Control library logs: 148 int *tracefs_set_loglevel*(enum tep_loglevel _level_); 149 150Dynamic event generic APIs: 151 struct *tracefs_dynevent*; 152 enum *tracefs_dynevent_type*; 153 int *tracefs_dynevent_create*(struct tracefs_dynevent pass:[*]_devent_); 154 int *tracefs_dynevent_destroy*(struct tracefs_dynevent pass:[*]_devent_, bool _force_); 155 int *tracefs_dynevent_destroy_all*(unsigned int _types_, bool _force_); 156 void *tracefs_dynevent_free*(struct tracefs_dynevent pass:[*]_devent_); 157 void *tracefs_dynevent_list_free*(struct tracefs_dynevent pass:[*]pass:[*]_events_); 158 struct tracefs_dynevent pass:[*]*tracefs_dynevent_get*(enum tracefs_dynevent_type _type_, const char pass:[*]_system_, const char pass:[*]_event_); 159 struct tracefs_dynevent pass:[*]pass:[*]*tracefs_dynevent_get_all*(unsigned int _types_, const char pass:[*]_system_); 160 enum tracefs_dynevent_type *tracefs_dynevent_info*(struct tracefs_dynevent pass:[*]_dynevent_, char pass:[*]pass:[*]_system_, char pass:[*]pass:[*]_event_, char pass:[*]pass:[*]_prefix_, char pass:[*]pass:[*]_addr_, char pass:[*]pass:[*]_format_); 161 struct tep_event pass:[*]*tracefs_dynevent_get_event*(struct tep_handle pass:[*]_tep_, struct tracefs_dynevent pass:[*]_dynevent_); 162 163Even probes (eprobes): 164 struct tracefs_dynevent pass:[*] *tracefs_eprobe_alloc*(const char pass:[*]_system_, const char pass:[*]_event_, const char pass:[*]_target_system_, const char pass:[*]_target_event_, const char pass:[*]_fetchargs_); 165 166Uprobes, Kprobes and Kretprobes: 167 struct tracefs_dynevent pass:[*] *tracefs_kprobe_alloc*(const char pass:[*]_system_, const char pass:[*]_event_, const char pass:[*]_addr_, const char pass:[*]_format_); 168 struct tracefs_dynevent pass:[*] *tracefs_kretprobe_alloc*(const char pass:[*]_system_, const char pass:[*]_event_, const char pass:[*]_addr_, const char pass:[*]_format_, unsigned int _max_); 169 int *tracefs_kprobe_raw*(const char pass:[*]_system_, const char pass:[*]_event_, const char pass:[*]_addr_, const char pass:[*]_format_); 170 int *tracefs_kretprobe_raw*(const char pass:[*]_system_, const char pass:[*]_event_, const char pass:[*]_addr_, const char pass:[*]_format_); 171 *tracefs_uprobe_alloc*(const char pass:[*]_system_, const char pass:[*]_event_, 172 const char pass:[*]_file_, unsigned long long _offset_, const char pass:[*]_fetchargs_) 173 *tracefs_uretprobe_alloc*(const char pass:[*]_system_, const char pass:[*]_event_, 174 const char pass:[*]_file_, unsigned long long _offset_, const char pass:[*]_fetchargs_); 175 176Synthetic events: 177 struct tracefs_synth pass:[*]*tracefs_sql*(struct tep_handle pass:[*]_tep_, const char pass:[*]_name_, 178 const char pass:[*]_sql_buffer_, char pass:[**]_err_); 179 struct tracefs_synth pass:[*]*tracefs_synth_alloc*(struct tep_handle pass:[*]_tep_, 180 const char pass:[*]_name_, 181 const char pass:[*]_start_system_, 182 const char pass:[*]_start_event_, 183 const char pass:[*]_end_system_, 184 const char pass:[*]_end_event_, 185 const char pass:[*]_start_match_field_, 186 const char pass:[*]_end_match_field_, 187 const char pass:[*]_match_name_); 188 int *tracefs_synth_add_match_field*(struct tracefs_synth pass:[*]_synth_, 189 const char pass:[*]_start_match_field_, 190 const char pass:[*]_end_match_field_, 191 const char pass:[*]_name_); 192 int *tracefs_synth_add_compare_field*(struct tracefs_synth pass:[*]_synth_, 193 const char pass:[*]_start_compare_field_, 194 const char pass:[*]_end_compare_field_, 195 enum tracefs_synth_calc _calc_, 196 const char pass:[*]_name_); 197 int *tracefs_synth_add_start_field*(struct tracefs_synth pass:[*]_synth_, 198 const char pass:[*]_start_field_, 199 const char pass:[*]_name_); 200 int *tracefs_synth_add_end_field*(struct tracefs_synth pass:[*]_synth_, 201 const char pass:[*]_end_field_, 202 const char pass:[*]_name_); 203 int *tracefs_synth_append_start_filter*(struct tracefs_synth pass:[*]_synth_, 204 struct tracefs_filter _type_, 205 const char pass:[*]_field_, 206 enum tracefs_synth_compare _compare_, 207 const char pass:[*]_val_); 208 int *tracefs_synth_append_end_filter*(struct tracefs_synth pass:[*]_synth_, 209 struct tracefs_filter _type_, 210 const char pass:[*]_field_, 211 enum tracefs_synth_compare _compare_, 212 const char pass:[*]_val_); 213 void *tracefs_synth_free*(struct tracefs_synth pass:[*]_synth_); 214 int *tracefs_synth_create*(struct tracefs_synth pass:[*]_synth_); 215 int *tracefs_synth_destroy*(struct tracefs_synth pass:[*]_synth_); 216 int *tracefs_synth_echo_cmd*(struct trace_seq pass:[*]_seq_, struct tracefs_synth pass:[*]_synth_); 217 bool *tracefs_synth_complete*(struct tracefs_synth pass:[*]_synth_); 218 struct tracefs_hist pass:[*]*tracefs_synth_get_start_hist*(struct tracefs_synth pass:[*]_synth_); 219 int *tracefs_synth_trace*(struct tracefs_synth pass:[*]_synth_, 220 enum tracefs_synth_handler _type_, const char pass:[*]_var_); 221 int *tracefs_synth_snapshot*(struct tracefs_synth pass:[*]_synth_, 222 enum tracefs_synth_handler _type_, const char pass:[*]_var_); 223 int *tracefs_synth_save*(struct tracefs_synth pass:[*]_synth_, 224 enum tracefs_synth_handler _type_, const char pass:[*]_var_, 225 char pass:[**]_save_fields_); 226 const char pass:[*]*tracefs_synth_get_name*(struct tracefs_synth pass:[*]_synth_); 227 int *tracefs_synth_raw_fmt*(struct trace_seq pass:[*]_seq_, struct tracefs_synth pass:[*]_synth_); 228 const char pass:[*]*tracefs_synth_show_event*(struct tracefs_synth pass:[*]_synth_); 229 const char pass:[*]*tracefs_synth_show_start_hist*(struct tracefs_synth pass:[*]_synth_); 230 const char pass:[*]*tracefs_synth_show_end_hist*(struct tracefs_synth pass:[*]_synth_); 231 struct tep_event pass:[*]*tracefs_synth_get_event*(struct tep_handle pass:[*]_tep_, struct tracefs_synth pass:[*]_synth_); 232 233Ftrace errors reporting: 234 char pass:[*]*tracefs_error_last*(struct tracefs_instance pass:[*]_instance_); 235 char pass:[*]*tracefs_error_all*(struct tracefs_instance pass:[*]_instance_); 236 int *tracefs_error_clear*(struct tracefs_instance pass:[*]_instance_); 237 238Histograms: 239 struct tracefs_hist pass:[*]*tracefs_hist_alloc*(struct tracefs_tep pass:[*] _tep_, 240 const char pass:[*]_system_, const char pass:[*]_event_, 241 const char pass:[*]_key_, enum tracefs_hist_key_type _type_); 242 struct tracefs_hist pass:[*]*tracefs_hist_alloc_2d*(struct tracefs_tep pass:[*] _tep_, 243 const char pass:[*]_system_, const char pass:[*]_event_, 244 const char pass:[*]_key1_, enum tracefs_hist_key_type _type1_, 245 const char pass:[*]_key2_, enum tracefs_hist_key_type _type2_)); 246 struct tracefs_hist pass:[*]*tracefs_hist_alloc_nd*(struct tracefs_tep pass:[*] _tep_, 247 const char pass:[*]_system_, const char pass:[*]_event_, 248 struct tracefs_hist_axis pass:[*]_axes_); 249 struct tracefs_hist pass:[*]*tracefs_hist_alloc_nd_cnt*(struct tep_handle pass:[*]_tep_, 250 const char pass:[*]_system_, const char pass:[*]_event_name_, 251 struct tracefs_hist_axis_cnt pass:[*]_axes_); 252 void *tracefs_hist_free*(struct tracefs_hist pass:[*]_hist_); 253 int *tracefs_hist_add_key*(struct tracefs_hist pass:[*]_hist_, const char pass:[*]_key_, 254 enum tracefs_hist_key_type _type_); 255 int *tracefs_hist_add_key_cnt*(struct tracefs_hist pass:[*]_hist_, const char pass:[*]_key_, 256 enum tracefs_hist_key_type _type_, int _cnt_); 257 int *tracefs_hist_add_value*(struct tracefs_hist pass:[*]_hist_, const char pass:[*]_value_); 258 int *tracefs_hist_add_sort_key*(struct tracefs_hist pass:[*]_hist_, 259 const char pass:[*]_sort_key_); 260 int *tracefs_hist_set_sort_key*(struct tracefs_hist pass:[*]_hist_, 261 const char pass:[*]_sort_key_, _..._); 262 int *tracefs_hist_sort_key_direction*(struct tracefs_hist pass:[*]_hist_, 263 const char pass:[*]_sort_key_, 264 enum tracefs_hist_sort_direction _dir_); 265 int *tracefs_hist_add_name*(struct tracefs_hist pass:[*]_hist_, const char pass:[*]_name_); 266 int *tracefs_hist_append_filter*(struct tracefs_hist pass:[*]_hist_, 267 enum tracefs_filter _type_, 268 const char pass:[*]_field_, 269 enum tracefs_compare _compare_, 270 const char pass:[*]_val_); 271 int *tracefs_hist_echo_cmd*(struct trace_seq pass:[*]_s_, struct tracefs_instance pass:[*]_instance_, 272 struct tracefs_hist pass:[*]_hist_, 273 enum tracefs_hist_command _command_); 274 int *tracefs_hist_command*(struct tracefs_instance pass:[*]_instance_, 275 struct tracefs_hist pass:[*]_hist_, 276 enum tracefs_hist_command _command_); 277 const char pass:[*]*tracefs_hist_get_name*(struct tracefs_hist pass:[*]_hist_); 278 const char pass:[*]*tracefs_hist_get_event*(struct tracefs_hist pass:[*]_hist_); 279 const char pass:[*]*tracefs_hist_get_system*(struct tracefs_hist pass:[*]_hist_); 280 int *tracefs_hist_start*(struct tracefs_instance pass:[*]_instance_, struct tracefs_hist pass:[*]_hist_); 281 int *tracefs_hist_destroy*(struct tracefs_instance pass:[*]_instance_, struct tracefs_hist pass:[*]_hist_); 282 int *tracefs_hist_pause*(struct tracefs_instance pass:[*]_instance_, struct tracefs_hist pass:[*]_hist_); 283 int *tracefs_hist_continue*(struct tracefs_instance pass:[*]_instance_, struct tracefs_hist pass:[*]_hist_); 284 int *tracefs_hist_reset*(struct tracefs_instance pass:[*]_instance_, struct tracefs_hist pass:[*]_hist_); 285 286Recording of trace_pipe_raw files: 287 struct tracefs_cpu pass:[*]*tracefs_cpu_open*(struct tracefs_instance pass:[*]_instance_, 288 int _cpu_, bool _nonblock_); 289 struct tracefs_cpu pass:[*]*tracefs_cpu_alloc_fd*(int _fd_, int _subbuf_size_, bool _nonblock_); 290 void *tracefs_cpu_close*(struct tracefs_cpu pass:[*]_tcpu_); 291 void *tracefs_cpu_free_fd*(struct tracefs_cpu pass:[*]_tcpu_); 292 int *tracefs_cpu_read_size*(struct tracefs_cpu pass:[*]_tcpu_); 293 int *tracefs_cpu_read*(struct tracefs_cpu pass:[*]_tcpu_, void pass:[*]_buffer_, bool _nonblock_); 294 int *tracefs_cpu_buffered_read*(struct tracefs_cpu pass:[*]_tcpu_, void pass:[*]_buffer_, bool _nonblock_); 295 int *tracefs_cpu_write*(struct tracefs_cpu pass:[*]_tcpu_, int _wfd_, bool _nonblock_); 296 int *tracefs_cpu_stop*(struct tracefs_cpu pass:[*]_tcpu_); 297 int *tracefs_cpu_flush*(struct tracefs_cpu pass:[*]_tcpu_, void pass:[*]_buffer_); 298 int *tracefs_cpu_flush_write*(struct tracefs_cpu pass:[*]_tcpu_, int _wfd_); 299 int *tracefs_cpu_pipe*(struct tracefs_cpu pass:[*]_tcpu_, int _wfd_, bool _nonblock_); 300 301-- 302 303DESCRIPTION 304----------- 305The libtracefs(3) library provides APIs to access kernel trace file system. 306 307FILES 308----- 309[verse] 310-- 311*tracefs.h* 312 Header file to include in order to have access to the library APIs. 313*-ltracefs* 314 Linker switch to add when building a program that uses the library. 315-- 316 317SEE ALSO 318-------- 319*libtraceevent*(3), 320*trace-cmd*(1) 321 322AUTHOR 323------ 324[verse] 325-- 326*Steven Rostedt* <[email protected]> 327*Tzvetomir Stoyanov* <[email protected]> 328-- 329REPORTING BUGS 330-------------- 331Report bugs to <[email protected]> 332 333LICENSE 334------- 335libtracefs is Free Software licensed under the GNU LGPL 2.1 336 337RESOURCES 338--------- 339https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/ 340 341COPYING 342------- 343Copyright \(C) 2020 VMware, Inc. Free use of this software is granted under 344the terms of the GNU Public License (GPL). 345