path: root/tools/perf/util/parse-events.c

#include "../../../include/linux/hw_breakpoint.h"
#include "util.h"
#include "../perf.h"
#include "evlist.h"
#include "evsel.h"
#include "parse-options.h"
#include "parse-events.h"
#include "exec_cmd.h"
#include "string.h"
#include "symbol.h"
#include "cache.h"
#include "header.h"
#include "debugfs.h"
#include "parse-events-flex.h"
#include "pmu.h"

#define MAX_NAME_LEN 100

struct event_symbol {
	u8		type;
	u64		config;
	const char	*symbol;
	const char	*alias;
};

#ifdef PARSER_DEBUG
extern int parse_events_debug;
#endif
int parse_events_parse(struct list_head *list, int *idx);

#define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
#define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x

static struct event_symbol event_symbols[] = {
  { CHW(CPU_CYCLES),			"cpu-cycles",			"cycles"		},
  { CHW(STALLED_CYCLES_FRONTEND),	"stalled-cycles-frontend",	"idle-cycles-frontend"	},
  { CHW(STALLED_CYCLES_BACKEND),	"stalled-cycles-backend",	"idle-cycles-backend"	},
  { CHW(INSTRUCTIONS),			"instructions",			""			},
  { CHW(CACHE_REFERENCES),		"cache-references",		""			},
  { CHW(CACHE_MISSES),			"cache-misses",			""			},
  { CHW(BRANCH_INSTRUCTIONS),		"branch-instructions",		"branches"		},
  { CHW(BRANCH_MISSES),			"branch-misses",		""			},
  { CHW(BUS_CYCLES),			"bus-cycles",			""			},
  { CHW(REF_CPU_CYCLES),		"ref-cycles",			""			},

  { CSW(CPU_CLOCK),			"cpu-clock",			""			},
  { CSW(TASK_CLOCK),			"task-clock",			""			},
  { CSW(PAGE_FAULTS),			"page-faults",			"faults"		},
  { CSW(PAGE_FAULTS_MIN),		"minor-faults",			""			},
  { CSW(PAGE_FAULTS_MAJ),		"major-faults",			""			},
  { CSW(CONTEXT_SWITCHES),		"context-switches",		"cs"			},
  { CSW(CPU_MIGRATIONS),		"cpu-migrations",		"migrations"		},
  { CSW(ALIGNMENT_FAULTS),		"alignment-faults",		""			},
  { CSW(EMULATION_FAULTS),		"emulation-faults",		""			},
};

#define __PERF_EVENT_FIELD(config, name) \
	((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)

#define PERF_EVENT_RAW(config)		__PERF_EVENT_FIELD(config, RAW)
#define PERF_EVENT_CONFIG(config)	__PERF_EVENT_FIELD(config, CONFIG)
#define PERF_EVENT_TYPE(config)		__PERF_EVENT_FIELD(config, TYPE)
#define PERF_EVENT_ID(config)		__PERF_EVENT_FIELD(config, EVENT)

#define for_each_subsystem(sys_dir, sys_dirent, sys_next)	       \
	while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)	       \
	if (sys_dirent.d_type == DT_DIR &&				       \
	   (strcmp(sys_dirent.d_name, ".")) &&				       \
	   (strcmp(sys_dirent.d_name, "..")))

static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
{
	char evt_path[MAXPATHLEN];
	int fd;

	snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
			sys_dir->d_name, evt_dir->d_name);
	fd = open(evt_path, O_RDONLY);
	if (fd < 0)
		return -EINVAL;
	close(fd);

	return 0;
}

#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)	       \
	while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
	if (evt_dirent.d_type == DT_DIR &&				       \
	   (strcmp(evt_dirent.d_name, ".")) &&				       \
	   (strcmp(evt_dirent.d_name, "..")) &&				       \
	   (!tp_event_has_id(&sys_dirent, &evt_dirent)))

#define MAX_EVENT_LENGTH 512


struct tracepoint_path *tracepoint_id_to_path(u64 config)
{
	struct tracepoint_path *path = NULL;
	DIR *sys_dir, *evt_dir;
	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
	char id_buf[24];
	int fd;
	u64 id;
	char evt_path[MAXPATHLEN];
	char dir_path[MAXPATHLEN];

	if (debugfs_valid_mountpoint(tracing_events_path))
		return NULL;

	sys_dir = opendir(tracing_events_path);
	if (!sys_dir)
		return NULL;

	for_each_subsystem(sys_dir, sys_dirent, sys_next) {

		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
			 sys_dirent.d_name);
		evt_dir = opendir(dir_path);
		if (!evt_dir)
			continue;

		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {

			snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
				 evt_dirent.d_name);
			fd = open(evt_path, O_RDONLY);
			if (fd < 0)
				continue;
			if (read(fd, id_buf, sizeof(id_buf)) < 0) {
				close(fd);
				continue;
			}
			close(fd);
			id = atoll(id_buf);
			if (id == config) {
				closedir(evt_dir);
				closedir(sys_dir);
				path = zalloc(sizeof(*path));
				path->system = malloc(MAX_EVENT_LENGTH);
				if (!path->system) {
					free(path);
					return NULL;
				}
				path->name = malloc(MAX_EVENT_LENGTH);
				if (!path->name) {
					free(path->system);
					free(path);
					return NULL;
				}
				strncpy(path->system, sys_dirent.d_name,
					MAX_EVENT_LENGTH);
				strncpy(path->name, evt_dirent.d_name,
					MAX_EVENT_LENGTH);
				return path;
			}
		}
		closedir(evt_dir);
	}

	closedir(sys_dir);
	return NULL;
}

#define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
static const char *tracepoint_id_to_name(u64 config)
{
	static char buf[TP_PATH_LEN];
	struct tracepoint_path *path;

	path = tracepoint_id_to_path(config);
	if (path) {
		snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->