diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/util/trace-event-info.c | 135 |
1 files changed, 118 insertions, 17 deletions
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c index 0e5c4786f296..c8755679281e 100644 --- a/tools/perf/util/trace-event-info.c +++ b/tools/perf/util/trace-event-info.c @@ -19,25 +19,25 @@ #include <linux/kernel.h> #include <linux/zalloc.h> #include <internal/lib.h> // page_size +#include <sys/param.h> #include "trace-event.h" +#include "tracepoint.h" #include <api/fs/tracing_path.h> #include "evsel.h" #include "debug.h" +#include "util.h" #define VERSION "0.6" +#define MAX_EVENT_LENGTH 512 static int output_fd; - -int bigendian(void) -{ - unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0}; - unsigned int *ptr; - - ptr = (unsigned int *)(void *)str; - return *ptr == 0x01020304; -} +struct tracepoint_path { + char *system; + char *name; + struct tracepoint_path *next; +}; /* unfortunately, you can not stat debugfs or proc files for size */ static int record_file(const char *file, ssize_t hdr_sz) @@ -71,7 +71,7 @@ static int record_file(const char *file, ssize_t hdr_sz) /* ugh, handle big-endian hdr_size == 4 */ sizep = (char*)&size; - if (bigendian()) + if (host_is_bigendian()) sizep += sizeof(u64) - hdr_sz; if (hdr_sz && pwrite(output_fd, sizep, hdr_sz, hdr_pos) < 0) { @@ -152,7 +152,7 @@ static bool name_in_tp_list(char *sys, struct tracepoint_path *tps) return false; } -#define for_each_event(dir, dent, tps) \ +#define for_each_event_tps(dir, dent, tps) \ while ((dent = readdir(dir))) \ if (dent->d_type == DT_DIR && \ (strcmp(dent->d_name, ".")) && \ @@ -174,7 +174,7 @@ static int copy_event_system(const char *sys, struct tracepoint_path *tps) return -errno; } - for_each_event(dir, dent, tps) { + for_each_event_tps(dir, dent, tps) { if (!name_in_tp_list(dent->d_name, tps)) continue; @@ -196,7 +196,7 @@ static int copy_event_system(const char *sys, struct tracepoint_path *tps) } rewinddir(dir); - for_each_event(dir, dent, tps) { + for_each_event_tps(dir, dent, tps) { if (!name_in_tp_list(dent->d_name, tps)) continue; @@ -274,7 +274,7 @@ static int record_event_files(struct tracepoint_path *tps) goto out; } - for_each_event(dir, dent, tps) { + for_each_event_tps(dir, dent, tps) { if (strcmp(dent->d_name, "ftrace") == 0 || !system_in_tp_list(dent->d_name, tps)) continue; @@ -289,7 +289,7 @@ static int record_event_files(struct tracepoint_path *tps) } rewinddir(dir); - for_each_event(dir, dent, tps) { + for_each_event_tps(dir, dent, tps) { if (strcmp(dent->d_name, "ftrace") == 0 || !system_in_tp_list(dent->d_name, tps)) continue; @@ -313,7 +313,8 @@ static int record_event_files(struct tracepoint_path *tps) } err = 0; out: - closedir(dir); + if (dir) + closedir(dir); put_tracing_file(path); return err; @@ -400,6 +401,106 @@ put_tracepoints_path(struct tracepoint_path *tps) } } +static struct tracepoint_path *tracepoint_id_to_path(u64 config) +{ + struct tracepoint_path *path = NULL; + DIR *sys_dir, *evt_dir; + struct dirent *sys_dirent, *evt_dirent; + char id_buf[24]; + int fd; + u64 id; + char evt_path[MAXPATHLEN]; + char *dir_path; + + sys_dir = tracing_events__opendir(); + if (!sys_dir) + return NULL; + + for_each_subsystem(sys_dir, sys_dirent) { + dir_path = get_events_file(sys_dirent->d_name); + if (!dir_path) + continue; + evt_dir = opendir(dir_path); + if (!evt_dir) + goto next; + + for_each_event(dir_path, evt_dir, evt_dirent) { + + scnprintf(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) { + put_events_file(dir_path); + closedir(evt_dir); + closedir(sys_dir); + path = zalloc(sizeof(*path)); + if (!path) + return NULL; + if (asprintf(&path->system, "%.*s", + MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) { + free(path); + return NULL; + } + if (asprintf(&path->name, "%.*s", + MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) { + zfree(&path->system); + free(path); + return NULL; + } + return path; + } + } + closedir(evt_dir); +next: + put_events_file(dir_path); + } + + closedir(sys_dir); + return NULL; +} + +char *tracepoint_id_to_name(u64 config) +{ + struct tracepoint_path *path = tracepoint_id_to_path(config); + char *buf = NULL; + + if (path && asprintf(&buf, "%s:%s", path->system, path->name) < 0) + buf = NULL; + + put_tracepoints_path(path); + return buf; +} + +static struct tracepoint_path *tracepoint_name_to_path(const char *name) +{ + struct tracepoint_path *path = zalloc(sizeof(*path)); + char *str = strchr(name, ':'); + + if (path == NULL || str == NULL) { + free(path); + return NULL; + } + + path->system = strndup(name, str - name); + path->name = strdup(str+1); + + if (path->system == NULL || path->name == NULL) { + zfree(&path->system); + zfree(&path->name); + zfree(&path); + } + + return path; +} + static struct tracepoint_path * get_tracepoints_path(struct list_head *pattrs) { @@ -468,7 +569,7 @@ static int tracing_data_header(void) return -1; /* save endian */ - if (bigendian()) + if (host_is_bigendian()) buf[0] = 1; else buf[0] = 0; |