diff options
| -rw-r--r-- | tools/perf/util/parse-events.c | 175 | ||||
| -rw-r--r-- | tools/perf/util/util.h | 2 |
2 files changed, 176 insertions, 1 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index d18c98e..5a3cd3a 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -12,6 +12,8 @@ int nr_counters; struct perf_counter_attr attrs[MAX_COUNTERS]; +static char default_debugfs_path[] = "/sys/kernel/debug/tracing/events"; + struct event_symbol { u8 type; u64 config; @@ -110,6 +112,88 @@ static unsigned long hw_cache_stat[C(MAX)] = { [C(BPU)] = (CACHE_READ), }; +#define for_each_subsystem(sys_dir, sys_dirent, sys_next, file, st) \ + while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \ + if (snprintf(file, MAXPATHLEN, "%s/%s", default_debugfs_path, \ + sys_dirent.d_name) && \ + (!stat(file, &st)) && (S_ISDIR(st.st_mode)) && \ + (strcmp(sys_dirent.d_name, ".")) && \ + (strcmp(sys_dirent.d_name, ".."))) + +#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next, file, st) \ + while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \ + if (snprintf(file, MAXPATHLEN, "%s/%s/%s", default_debugfs_path, \ + sys_dirent.d_name, evt_dirent.d_name) && \ + (!stat(file, &st)) && (S_ISDIR(st.st_mode)) && \ + (strcmp(evt_dirent.d_name, ".")) && \ + (strcmp(evt_dirent.d_name, ".."))) + +#define MAX_EVENT_LENGTH 30 + +static int valid_debugfs_mount(void) +{ + struct statfs st_fs; + + if (statfs(default_debugfs_path, &st_fs) < 0) + return -ENOENT; + else if (st_fs.f_type != (long) DEBUGFS_MAGIC) + return -ENOENT; + return 0; +} + +static char *tracepoint_id_to_name(u64 config) +{ + static char tracepoint_name[2 * MAX_EVENT_LENGTH]; + DIR *sys_dir, *evt_dir; + struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; + struct stat st; + char id_buf[4]; + int fd; + u64 id; + char evt_path[MAXPATHLEN]; + + if (valid_debugfs_mount()) + return "unkown"; + + sys_dir = opendir(default_debugfs_path); + if (!sys_dir) + goto cleanup; + + for_each_subsystem(sys_dir, sys_dirent, sys_next, evt_path, st) { + evt_dir = opendir(evt_path); + if (!evt_dir) + goto cleanup; + for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next, + evt_path, st) { + snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", + default_debugfs_path, sys_dirent.d_name, + 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); + snprintf(tracepoint_name, 2 * MAX_EVENT_LENGTH, + "%s:%s", sys_dirent.d_name, + evt_dirent.d_name); + return tracepoint_name; + } + } + closedir(evt_dir); + } + +cleanup: + closedir(sys_dir); + return "unkown"; +} + static int is_cache_op_valid(u8 cache_type, u8 cache_op) { if (hw_cache_stat[cache_type] & COP(cache_op)) @@ -177,6 +261,9 @@ char *event_name(int counter) return sw_event_names[config]; return "unknown-software"; + case PERF_TYPE_TRACEPOINT: + return tracepoint_id_to_name(config); + default: break; } @@ -265,6 +352,53 @@ parse_generic_hw_event(const char **str, struct perf_counter_attr *attr) return 1; } +static int parse_tracepoint_event(const char **strp, + struct perf_counter_attr *attr) +{ + const char *evt_name; + char sys_name[MAX_EVENT_LENGTH]; + char id_buf[4]; + int fd; + unsigned int sys_length, evt_length; + u64 id; + char evt_path[MAXPATHLEN]; + + if (valid_debugfs_mount()) + return 0; + + evt_name = strchr(*strp, ':'); + if (!evt_name) + return 0; + + sys_length = evt_name - *strp; + if (sys_length >= MAX_EVENT_LENGTH) + return 0; + + strncpy(sys_name, *strp, sys_length); + sys_name[sys_length] = '\0'; + evt_name = evt_name + 1; + evt_length = strlen(evt_name); + if (evt_length >= MAX_EVENT_LENGTH) + return 0; + + snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", default_debugfs_path, + sys_name, evt_name); + fd = open(evt_path, O_RDONLY); + if (fd < 0) + return 0; + + if (read(fd, id_buf, sizeof(id_buf)) < 0) { + close(fd); + return 0; + } + close(fd); + id = atoll(id_buf); + attr->config = id; + attr->type = PERF_TYPE_TRACEPOINT; + *strp = evt_name + evt_length; + return 1; +} + static int check_events(const char *str, unsigned int i) { int n; @@ -374,7 +508,8 @@ parse_event_modifier(const char **strp, struct perf_counter_attr *attr) */ static int parse_event_symbols(const char **str, struct perf_counter_attr *attr) { - if (!(parse_raw_event(str, attr) || + if (!(parse_tracepoint_event(str, attr) || + parse_raw_event(str, attr) || parse_numeric_event(str, attr) || parse_symbolic_event(str, attr) || parse_generic_hw_event(str, attr))) @@ -423,6 +558,42 @@ static const char * const event_type_descriptors[] = { }; /* + * Print the events from <debugfs_mount_point>/tracing/events + */ + +static void print_tracepoint_events(void) +{ + DIR *sys_dir, *evt_dir; + struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; + struct stat st; + char evt_path[MAXPATHLEN]; + + if (valid_debugfs_mount()) + return; + + sys_dir = opendir(default_debugfs_path); + if (!sys_dir) + goto cleanup; + + for_each_subsystem(sys_dir, sys_dirent, sys_next, evt_path, st) { + evt_dir = opendir(evt_path); + if (!evt_dir) + goto cleanup; + for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next, + evt_path, st) { + snprintf(evt_path, MAXPATHLEN, "%s:%s", + sys_dirent.d_name, evt_dirent.d_name); + fprintf(stderr, " %-40s [%s]\n", evt_path, + event_type_descriptors[PERF_TYPE_TRACEPOINT+1]); + } + closedir(evt_dir); + } + +cleanup: + closedir(sys_dir); +} + +/* * Print the help text for the event symbols: */ void print_events(void) @@ -472,5 +643,7 @@ void print_events(void) "rNNN"); fprintf(stderr, "\n"); + print_tracepoint_events(); + exit(129); } diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index b4be607..68fe157 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -50,6 +50,7 @@ #include <unistd.h> #include <stdio.h> #include <sys/stat.h> +#include <sys/statfs.h> #include <fcntl.h> #include <stddef.h> #include <stdlib.h> @@ -80,6 +81,7 @@ #include <netdb.h> #include <pwd.h> #include <inttypes.h> +#include "../../../include/linux/magic.h" #ifndef NO_ICONV #include <iconv.h> |
