diff options
| -rw-r--r-- | tools/perf/util/parse-events.c | 204 |
1 files changed, 154 insertions, 50 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index a587d41ae3c..d06c66cd358 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -18,6 +18,12 @@ struct event_symbol { const char *alias; }; +enum event_result { + EVT_FAILED, + EVT_HANDLED, + EVT_HANDLED_ALL +}; + char debugfs_path[MAXPATHLEN]; #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x @@ -344,7 +350,7 @@ static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int return -1; } -static int +static enum event_result parse_generic_hw_event(const char **str, struct perf_counter_attr *attr) { const char *s = *str; @@ -356,7 +362,7 @@ parse_generic_hw_event(const char **str, struct perf_counter_attr *attr) * then bail out: */ if (cache_type == -1) - return 0; + return EVT_FAILED; while ((cache_op == -1 || cache_result == -1) && *s == '-') { ++s; @@ -402,27 +408,112 @@ parse_generic_hw_event(const char **str, struct perf_counter_attr *attr) attr->type = PERF_TYPE_HW_CACHE; *str = s; - return 1; + return EVT_HANDLED; +} + +static enum event_result +parse_single_tracepoint_event(char *sys_name, + const char *evt_name, + unsigned int evt_length, + char *flags, + struct perf_counter_attr *attr, + const char **strp) +{ + char evt_path[MAXPATHLEN]; + char id_buf[4]; + u64 id; + int fd; + + if (flags) { + if (!strncmp(flags, "record", strlen(flags))) + attr->sample_type |= PERF_SAMPLE_RAW; + } + + snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path, + sys_name, evt_name); + + fd = open(evt_path, O_RDONLY); + if (fd < 0) + return EVT_FAILED; + + if (read(fd, id_buf, sizeof(id_buf)) < 0) { + close(fd); + return EVT_FAILED; + } + + close(fd); + id = atoll(id_buf); + attr->config = id; + attr->type = PERF_TYPE_TRACEPOINT; + *strp = evt_name + evt_length; + + return EVT_HANDLED; } -static int parse_tracepoint_event(const char **strp, +/* sys + ':' + event + ':' + flags*/ +#define MAX_EVOPT_LEN (MAX_EVENT_LENGTH * 2 + 2 + 128) +static enum event_result +parse_subsystem_tracepoint_event(char *sys_name, char *flags) +{ + char evt_path[MAXPATHLEN]; + struct dirent *evt_ent; + DIR *evt_dir; + + snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name); + evt_dir = opendir(evt_path); + + if (!evt_dir) { + perror("Can't open event dir"); + return EVT_FAILED; + } + + while ((evt_ent = readdir(evt_dir))) { + char event_opt[MAX_EVOPT_LEN + 1]; + int len; + unsigned int rem = MAX_EVOPT_LEN; + + if (!strcmp(evt_ent->d_name, ".") + || !strcmp(evt_ent->d_name, "..") + || !strcmp(evt_ent->d_name, "enable") + || !strcmp(evt_ent->d_name, "filter")) + continue; + + len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s", sys_name, + evt_ent->d_name); + if (len < 0) + return EVT_FAILED; + + rem -= len; + if (flags) { + if (rem < strlen(flags) + 1) + return EVT_FAILED; + + strcat(event_opt, ":"); + strcat(event_opt, flags); + } + + if (parse_events(NULL, event_opt, 0)) + return EVT_FAILED; + } + + return EVT_HANDLED_ALL; +} + + +static enum event_result parse_tracepoint_event(const char **strp, struct perf_counter_attr *attr) { const char *evt_name; char *flags; 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(debugfs_path)) return 0; evt_name = strchr(*strp, ':'); if (!evt_name) - return 0; + return EVT_FAILED; sys_length = evt_name - *strp; if (sys_length >= MAX_EVENT_LENGTH) @@ -436,30 +527,19 @@ static int parse_tracepoint_event(const char **strp, if (flags) { *flags = '\0'; flags++; - if (!strncmp(flags, "record", strlen(flags))) - attr->sample_type |= PERF_SAMPLE_RAW; } evt_length = strlen(evt_name); if (evt_length >= MAX_EVENT_LENGTH) - return 0; + return EVT_FAILED; - snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", 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; + if (!strcmp(evt_name, "*")) { + *strp = evt_name + evt_length; + return parse_subsystem_tracepoint_event(sys_name, flags); + } else + return parse_single_tracepoint_event(sys_name, evt_name, + evt_length, flags, + attr, strp); } static int check_events(const char *str, unsigned int i) @@ -477,7 +557,7 @@ static int check_events(const char *str, unsigned int i) return 0; } -static int +static enum event_result parse_symbolic_event(const char **strp, struct perf_counter_attr *attr) { const char *str = *strp; @@ -490,31 +570,32 @@ parse_symbolic_event(const char **strp, struct perf_counter_attr *attr) attr->type = event_symbols[i].type; attr->config = event_symbols[i].config; *strp = str + n; - return 1; + return EVT_HANDLED; } } - return 0; + return EVT_FAILED; } -static int parse_raw_event(const char **strp, struct perf_counter_attr *attr) +static enum event_result +parse_raw_event(const char **strp, struct perf_counter_attr *attr) { const char *str = *strp; u64 config; int n; if (*str != 'r') - return 0; + return EVT_FAILED; n = hex2u64(str + 1, &config); if (n > 0) { *strp = str + n + 1; attr->type = PERF_TYPE_RAW; attr->config = config; - return 1; + return EVT_HANDLED; } - return 0; + return EVT_FAILED; } -static int +static enum event_result parse_numeric_event(const char **strp, struct perf_counter_attr *attr) { const char *str = *strp; @@ -530,13 +611,13 @@ parse_numeric_event(const char **strp, struct perf_counter_attr *attr) attr->type = type; attr->config = config; *strp = endp; - return 1; + return EVT_HANDLED; } } - return 0; + return EVT_FAILED; } -static int +static enum event_result parse_event_modifier(const char **strp, struct perf_counter_attr *attr) { const char *str = *strp; @@ -569,37 +650,60 @@ parse_event_modifier(const char **strp, struct perf_counter_attr *attr) * Each event can have multiple symbolic names. * Symbolic names are (almost) exactly matched. */ -static int parse_event_symbols(const char **str, struct perf_counter_attr *attr) +static enum event_result +parse_event_symbols(const char **str, struct perf_counter_attr *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))) - return 0; + enum event_result ret; + + ret = parse_tracepoint_event(str, attr); + if (ret != EVT_FAILED) + goto modifier; + + ret = parse_raw_event(str, attr); + if (ret != EVT_FAILED) + goto modifier; + ret = parse_numeric_event(str, attr); + if (ret != EVT_FAILED) + goto modifier; + + ret = parse_symbolic_event(str, attr); + if (ret != EVT_FAILED) + goto modifier; + + ret = parse_generic_hw_event(str, attr); + if (ret != EVT_FAILED) + goto modifier; + + return EVT_FAILED; + +modifier: parse_event_modifier(str, attr); - return 1; + return ret; } int parse_events(const struct option *opt __used, const char *str, int unset __used) { struct perf_counter_attr attr; + enum event_result ret; for (;;) { if (nr_counters == MAX_COUNTERS) return -1; memset(&attr, 0, sizeof(attr)); - if (!parse_event_symbols(&str, &attr)) + ret = parse_event_symbols(&str, &attr); + if (ret == EVT_FAILED) return -1; if (!(*str == 0 || *str == ',' || isspace(*str))) return -1; - attrs[nr_counters] = attr; - nr_counters++; + if (ret != EVT_HANDLED_ALL) { + attrs[nr_counters] = attr; + nr_counters++; + } if (*str == 0) break; |