| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jiri Olsa | 3241 | 26.63% | 47 | 19.92% |
| Wang Nan | 2042 | 16.78% | 27 | 11.44% |
| Kan Liang | 1015 | 8.34% | 4 | 1.69% |
| Arnaldo Carvalho de Melo | 767 | 6.30% | 47 | 19.92% |
| Yunlong Song | 662 | 5.44% | 1 | 0.42% |
| Andi Kleen | 622 | 5.11% | 15 | 6.36% |
| Masami Hiramatsu | 477 | 3.92% | 3 | 1.27% |
| He Kuang | 409 | 3.36% | 3 | 1.27% |
| Frédéric Weisbecker | 399 | 3.28% | 5 | 2.12% |
| Ingo Molnar | 356 | 2.93% | 10 | 4.24% |
| Jason Baron | 312 | 2.56% | 2 | 0.85% |
| Namhyung Kim | 269 | 2.21% | 4 | 1.69% |
| Yan Zheng | 194 | 1.59% | 3 | 1.27% |
| Paul Mackerras | 175 | 1.44% | 1 | 0.42% |
| Peter Zijlstra | 146 | 1.20% | 3 | 1.27% |
| Adrian Hunter | 136 | 1.12% | 9 | 3.81% |
| Thomas Renninger | 132 | 1.08% | 1 | 0.42% |
| Mathieu J. Poirier | 122 | 1.00% | 3 | 1.27% |
| Jaswinder Singh Rajput | 113 | 0.93% | 4 | 1.69% |
| Joerg Roedel | 62 | 0.51% | 1 | 0.42% |
| Stéphane Eranian | 56 | 0.46% | 4 | 1.69% |
| Michael Ellerman | 53 | 0.44% | 1 | 0.42% |
| Li Zefan | 51 | 0.42% | 2 | 0.85% |
| Robert Richter | 48 | 0.39% | 2 | 0.85% |
| Vince Weaver | 38 | 0.31% | 1 | 0.42% |
| Taeung Song | 30 | 0.25% | 4 | 1.69% |
| Jack Henschel | 26 | 0.21% | 1 | 0.42% |
| Agustin Vega-Frias | 25 | 0.21% | 2 | 0.85% |
| Thomas Gleixner | 24 | 0.20% | 1 | 0.42% |
| David Ahern | 23 | 0.19% | 3 | 1.27% |
| Eric Dumazet | 22 | 0.18% | 1 | 0.42% |
| Mark Rutland | 22 | 0.18% | 1 | 0.42% |
| Jacob Shin | 18 | 0.15% | 1 | 0.42% |
| Matt Fleming | 17 | 0.14% | 2 | 0.85% |
| Liming Wang | 15 | 0.12% | 1 | 0.42% |
| Anton Blanchard | 10 | 0.08% | 1 | 0.42% |
| Ulrich Drepper | 9 | 0.07% | 1 | 0.42% |
| Sukadev Bhattiprolu | 8 | 0.07% | 2 | 0.85% |
| Jovi Zhang | 6 | 0.05% | 1 | 0.42% |
| Arjan van de Ven | 3 | 0.02% | 1 | 0.42% |
| Marti Raudsepp | 3 | 0.02% | 1 | 0.42% |
| Josh Poimboeuf | 2 | 0.02% | 1 | 0.42% |
| Krister Johansen | 2 | 0.02% | 1 | 0.42% |
| Clark Williams | 2 | 0.02% | 1 | 0.42% |
| David Howells | 1 | 0.01% | 1 | 0.42% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 0.42% |
| Irina Tirdea | 1 | 0.01% | 1 | 0.42% |
| Julia Lawall | 1 | 0.01% | 1 | 0.42% |
| Adam Buchbinder | 1 | 0.01% | 1 | 0.42% |
| Lin Ming | 1 | 0.01% | 1 | 0.42% |
| Total | 12170 | 236 |
// SPDX-License-Identifier: GPL-2.0 #include <linux/hw_breakpoint.h> #include <linux/err.h> #include <dirent.h> #include <errno.h> #include <sys/ioctl.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/param.h> #include "term.h" #include "../perf.h" #include "evlist.h" #include "evsel.h" #include <subcmd/parse-options.h> #include "parse-events.h" #include <subcmd/exec-cmd.h> #include "string2.h" #include "strlist.h" #include "symbol.h" #include "cache.h" #include "header.h" #include "bpf-loader.h" #include "debug.h" #include <api/fs/tracing_path.h> #include "parse-events-bison.h" #define YY_EXTRA_TYPE int #include "parse-events-flex.h" #include "pmu.h" #include "thread_map.h" #include "cpumap.h" #include "probe-file.h" #include "asm/bug.h" #include "util/parse-branch-options.h" #include "metricgroup.h" #define MAX_NAME_LEN 100 #ifdef PARSER_DEBUG extern int parse_events_debug; #endif int parse_events_parse(void *parse_state, void *scanner); static int get_config_terms(struct list_head *head_config, struct list_head *head_terms __maybe_unused); static struct perf_pmu_event_symbol *perf_pmu_events_list; /* * The variable indicates the number of supported pmu event symbols. * 0 means not initialized and ready to init * -1 means failed to init, don't try anymore * >0 is the number of supported pmu event symbols */ static int perf_pmu_events_list_num; struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = { [PERF_COUNT_HW_CPU_CYCLES] = { .symbol = "cpu-cycles", .alias = "cycles", }, [PERF_COUNT_HW_INSTRUCTIONS] = { .symbol = "instructions", .alias = "", }, [PERF_COUNT_HW_CACHE_REFERENCES] = { .symbol = "cache-references", .alias = "", }, [PERF_COUNT_HW_CACHE_MISSES] = { .symbol = "cache-misses", .alias = "", }, [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { .symbol = "branch-instructions", .alias = "branches", }, [PERF_COUNT_HW_BRANCH_MISSES] = { .symbol = "branch-misses", .alias = "", }, [PERF_COUNT_HW_BUS_CYCLES] = { .symbol = "bus-cycles", .alias = "", }, [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = { .symbol = "stalled-cycles-frontend", .alias = "idle-cycles-frontend", }, [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = { .symbol = "stalled-cycles-backend", .alias = "idle-cycles-backend", }, [PERF_COUNT_HW_REF_CPU_CYCLES] = { .symbol = "ref-cycles", .alias = "", }, }; struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = { [PERF_COUNT_SW_CPU_CLOCK] = { .symbol = "cpu-clock", .alias = "", }, [PERF_COUNT_SW_TASK_CLOCK] = { .symbol = "task-clock", .alias = "", }, [PERF_COUNT_SW_PAGE_FAULTS] = { .symbol = "page-faults", .alias = "faults", }, [PERF_COUNT_SW_CONTEXT_SWITCHES] = { .symbol = "context-switches", .alias = "cs", }, [PERF_COUNT_SW_CPU_MIGRATIONS] = { .symbol = "cpu-migrations", .alias = "migrations", }, [PERF_COUNT_SW_PAGE_FAULTS_MIN] = { .symbol = "minor-faults", .alias = "", }, [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = { .symbol = "major-faults", .alias = "", }, [PERF_COUNT_SW_ALIGNMENT_FAULTS] = { .symbol = "alignment-faults", .alias = "", }, [PERF_COUNT_SW_EMULATION_FAULTS] = { .symbol = "emulation-faults", .alias = "", }, [PERF_COUNT_SW_DUMMY] = { .symbol = "dummy", .alias = "", }, [PERF_COUNT_SW_BPF_OUTPUT] = { .symbol = "bpf-output", .alias = "", }, }; #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) \ while ((sys_dirent = readdir(sys_dir)) != NULL) \ if (sys_dirent->d_type == DT_DIR && \ (strcmp(sys_dirent->d_name, ".")) && \ (strcmp(sys_dirent->d_name, ".."))) static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir) { char evt_path[MAXPATHLEN]; int fd; snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name); fd = open(evt_path, O_RDONLY); if (fd < 0) return -EINVAL; close(fd); return 0; } #define for_each_event(dir_path, evt_dir, evt_dirent) \ while ((evt_dirent = readdir(evt_dir)) != NULL) \ if (evt_dirent->d_type == DT_DIR && \ (strcmp(evt_dirent->d_name, ".")) && \ (strcmp(evt_dirent->d_name, "..")) && \ (!tp_event_has_id(dir_path, 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_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; path->system = malloc(MAX_EVENT_LENGTH); if (!path->system) { free(path); return NULL; } path->name = malloc(MAX_EVENT_LENGTH); if (!path->name) { zfree(&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); next: put_events_file(dir_path); } closedir(sys_dir); return NULL; } 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; } const char *event_type(int type) { switch (type) { case PERF_TYPE_HARDWARE: return "hardware"; case PERF_TYPE_SOFTWARE: return "software"; case PERF_TYPE_TRACEPOINT: return "tracepoint"; case PERF_TYPE_HW_CACHE: return "hardware-cache"; default: break; } return "unknown"; } static int parse_events__is_name_term(struct parse_events_term *term) { return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME; } static char *get_config_name(struct list_head *head_terms) { struct parse_events_term *term; if (!head_terms) return NULL; list_for_each_entry(term, head_terms, list) if (parse_events__is_name_term(term)) return term->val.str; return NULL; } static struct perf_evsel * __add_event(struct list_head *list, int *idx, struct perf_event_attr *attr, char *name, struct perf_pmu *pmu, struct list_head *config_terms, bool auto_merge_stats) { struct perf_evsel *evsel; struct cpu_map *cpus = pmu ? pmu->cpus : NULL; event_attr_init(attr); evsel = perf_evsel__new_idx(attr, *idx); if (!evsel) return NULL; (*idx)++; evsel->cpus = cpu_map__get(cpus); evsel->own_cpus = cpu_map__get(cpus); evsel->system_wide = pmu ? pmu->is_uncore : false; evsel->auto_merge_stats = auto_merge_stats; if (name) evsel->name = strdup(name); if (config_terms) list_splice(config_terms, &evsel->config_terms); list_add_tail(&evsel->node, list); return evsel; } static int add_event(struct list_head *list, int *idx, struct perf_event_attr *attr, char *name, struct list_head *config_terms) { return __add_event(list, idx, attr, name, NULL, config_terms, false) ? 0 : -ENOMEM; } static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size) { int i, j; int n, longest = -1; for (i = 0; i < size; i++) { for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) { n = strlen(names[i][j]); if (n > longest && !strncasecmp(str, names[i][j], n)) longest = n; } if (longest > 0) return i; } return -1; } typedef int config_term_func_t(struct perf_event_attr *attr, struct parse_events_term *term, struct parse_events_error *err); static int config_term_common(struct perf_event_attr *attr, struct parse_events_term *term, struct parse_events_error *err); static int config_attr(struct perf_event_attr *attr, struct list_head *head, struct parse_events_error *err, config_term_func_t config_term); int parse_events_add_cache(struct list_head *list, int *idx, char *type, char *op_result1, char *op_result2, struct parse_events_error *err, struct list_head *head_config) { struct perf_event_attr attr; LIST_HEAD(config_terms); char name[MAX_NAME_LEN], *config_name; int cache_type = -1, cache_op = -1, cache_result = -1; char *op_result[2] = { op_result1, op_result2 }; int i, n; /* * No fallback - if we cannot get a clear cache type * then bail out: */ cache_type = parse_aliases(type, perf_evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX); if (cache_type == -1) return -EINVAL; config_name = get_config_name(head_config); n = snprintf(name, MAX_NAME_LEN, "%s", type); for (i = 0; (i < 2) && (op_result[i]); i++) { char *str = op_result[i]; n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str); if (cache_op == -1) { cache_op = parse_aliases(str, perf_evsel__hw_cache_op, PERF_COUNT_HW_CACHE_OP_MAX); if (cache_op >= 0) { if (!perf_evsel__is_cache_op_valid(cache_type, cache_op)) return -EINVAL; continue; } } if (cache_result == -1) { cache_result = parse_aliases(str, perf_evsel__hw_cache_result, PERF_COUNT_HW_CACHE_RESULT_MAX); if (cache_result >= 0) continue; } } /* * Fall back to reads: */ if (cache_op == -1) cache_op = PERF_COUNT_HW_CACHE_OP_READ; /* * Fall back to accesses: */ if (cache_result == -1) cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS; memset(&attr, 0, sizeof(attr)); attr.config = cache_type | (cache_op << 8) | (cache_result << 16); attr.type = PERF_TYPE_HW_CACHE; if (head_config) { if (config_attr(&attr, head_config, err, config_term_common)) return -EINVAL; if (get_config_terms(head_config, &config_terms)) return -ENOMEM; } return add_event(list, idx, &attr, config_name ? : name, &config_terms); } static void tracepoint_error(struct parse_events_error *e, int err, const char *sys, const char *name) { char help[BUFSIZ]; if (!e) return; /* * We get error directly from syscall errno ( > 0), * or from encoded pointer's error ( < 0). */ err = abs(err); switch (err) { case EACCES: e->str = strdup("can't access trace events"); break; case ENOENT: e->str = strdup("unknown tracepoint"); break; default: e->str = strdup("failed to add tracepoint"); break; } tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name); e->help = strdup(help); } static int add_tracepoint(struct list_head *list, int *idx, const char *sys_name, const char *evt_name, struct parse_events_error *err, struct list_head *head_config) { struct perf_evsel *evsel; evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++); if (IS_ERR(evsel)) { tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name); return PTR_ERR(evsel); } if (head_config) { LIST_HEAD(config_terms); if (get_config_terms(head_config, &config_terms)) return -ENOMEM; list_splice(&config_terms, &evsel->config_terms); } list_add_tail(&evsel->node, list); return 0; } static int add_tracepoint_multi_event(struct list_head *list, int *idx, const char *sys_name, const char *evt_name, struct parse_events_error *err, struct list_head *head_config) { char *evt_path; struct dirent *evt_ent; DIR *evt_dir; int ret = 0, found = 0; evt_path = get_events_file(sys_name); if (!evt_path) { tracepoint_error(err, errno, sys_name, evt_name); return -1; } evt_dir = opendir(evt_path); if (!evt_dir) { put_events_file(evt_path); tracepoint_error(err, errno, sys_name, evt_name); return -1; } while (!ret && (evt_ent = readdir(evt_dir))) { if (!strcmp(evt_ent->d_name, ".") || !strcmp(evt_ent->d_name, "..") || !strcmp(evt_ent->d_name, "enable") || !strcmp(evt_ent->d_name, "filter")) continue; if (!strglobmatch(evt_ent->d_name, evt_name)) continue; found++; ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name, err, head_config); } if (!found) { tracepoint_error(err, ENOENT, sys_name, evt_name); ret = -1; } put_events_file(evt_path); closedir(evt_dir); return ret; } static int add_tracepoint_event(struct list_head *list, int *idx, const char *sys_name, const char *evt_name, struct parse_events_error *err, struct list_head *head_config) { return strpbrk(evt_name, "*?") ? add_tracepoint_multi_event(list, idx, sys_name, evt_name, err, head_config) : add_tracepoint(list, idx, sys_name, evt_name, err, head_config); } static int add_tracepoint_multi_sys(struct list_head *list, int *idx, const char *sys_name, const char *evt_name, struct parse_events_error *err, struct list_head *head_config) { struct dirent *events_ent; DIR *events_dir; int ret = 0; events_dir = tracing_events__opendir(); if (!events_dir) { tracepoint_error(err, errno, sys_name, evt_name); return -1; } while (!ret && (events_ent = readdir(events_dir))) { if (!strcmp(events_ent->d_name, ".") || !strcmp(events_ent->d_name, "..") || !strcmp(events_ent->d_name, "enable") || !strcmp(events_ent->d_name, "header_event") || !strcmp(events_ent->d_name, "header_page")) continue; if (!strglobmatch(events_ent->d_name, sys_name)) continue; ret = add_tracepoint_event(list, idx, events_ent->d_name, evt_name, err, head_config); } closedir(events_dir); return ret; } struct __add_bpf_event_param { struct parse_events_state *parse_state; struct list_head *list; struct list_head *head_config; }; static int add_bpf_event(const char *group, const char *event, int fd, void *_param) { LIST_HEAD(new_evsels); struct __add_bpf_event_param *param = _param; struct parse_events_state *parse_state = param->parse_state; struct list_head *list = param->list; struct perf_evsel *pos; int err; pr_debug("add bpf event %s:%s and attach bpf program %d\n", group, event, fd); err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group, event, parse_state->error, param->head_config); if (err) { struct perf_evsel *evsel, *tmp; pr_debug("Failed to add BPF event %s:%s\n", group, event); list_for_each_entry_safe(evsel, tmp, &new_evsels, node) { list_del(&evsel->node); perf_evsel__delete(evsel); } return err; } pr_debug("adding %s:%s\n", group, event); list_for_each_entry(pos, &new_evsels, node) { pr_debug("adding %s:%s to %p\n", group, event, pos); pos->bpf_fd = fd; } list_splice(&new_evsels, list); return 0; } int parse_events_load_bpf_obj(struct parse_events_state *parse_state, struct list_head *list, struct bpf_object *obj, struct list_head *head_config) { int err; char errbuf[BUFSIZ]; struct __add_bpf_event_param param = {parse_state, list, head_config}; static bool registered_unprobe_atexit = false; if (IS_ERR(obj) || !obj) { snprintf(errbuf, sizeof(errbuf), "Internal error: load bpf obj with NULL"); err = -EINVAL; goto errout; } /* * Register atexit handler before calling bpf__probe() so * bpf__probe() don't need to unprobe probe points its already * created when failure. */ if (!registered_unprobe_atexit) { atexit(bpf__clear); registered_unprobe_atexit = true; } err = bpf__probe(obj); if (err) { bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf)); goto errout; } err = bpf__load(obj); if (err) { bpf__strerror_load(obj, err, errbuf, sizeof(errbuf)); goto errout; } err = bpf__foreach_event(obj, add_bpf_event, ¶m); if (err) { snprintf(errbuf, sizeof(errbuf), "Attach events in BPF object failed"); goto errout; } return 0; errout: parse_state->error->help = strdup("(add -v to see detail)"); parse_state->error->str = strdup(errbuf); return err; } static int parse_events_config_bpf(struct parse_events_state *parse_state, struct bpf_object *obj, struct list_head *head_config) { struct parse_events_term *term; int error_pos; if (!head_config || list_empty(head_config)) return 0; list_for_each_entry(term, head_config, list) { char errbuf[BUFSIZ]; int err; if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) { snprintf(errbuf, sizeof(errbuf), "Invalid config term for BPF object"); errbuf[BUFSIZ - 1] = '\0'; parse_state->error->idx = term->err_term; parse_state->error->str = strdup(errbuf); return -EINVAL; } err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos); if (err) { bpf__strerror_config_obj(obj, term, parse_state->evlist, &error_pos, err, errbuf, sizeof(errbuf)); parse_state->error->help = strdup( "Hint:\tValid config terms:\n" " \tmap:[<arraymap>].value<indices>=[value]\n" " \tmap:[<eventmap>].event<indices>=[event]\n" "\n" " \twhere <indices> is something like [0,3...5] or [all]\n" " \t(add -v to see detail)"); parse_state->error->str = strdup(errbuf); if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE) parse_state->error->idx = term->err_val; else parse_state->error->idx = term->err_term + error_pos; return err; } } return 0; } /* * Split config terms: * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ... * 'call-graph=fp' is 'evt config', should be applied to each * events in bpf.c. * 'map:array.value[0]=1' is 'obj config', should be processed * with parse_events_config_bpf. * * Move object config terms from the first list to obj_head_config. */ static void split_bpf_config_terms(struct list_head *evt_head_config, struct list_head *obj_head_config) { struct parse_events_term *term, *temp; /* * Currectly, all possible user config term * belong to bpf object. parse_events__is_hardcoded_term() * happends to be a good flag. * * See parse_events_config_bpf() and * config_term_tracepoint(). */ list_for_each_entry_safe(term, temp, evt_head_config, list) if (!parse_events__is_hardcoded_term(term)) list_move_tail(&term->list, obj_head_config); } int parse_events_load_bpf(struct parse_events_state *parse_state, struct list_head *list, char *bpf_file_name, bool source, struct list_head *head_config) { int err; struct bpf_object *obj; LIST_HEAD(obj_head_config); if (head_config) split_bpf_config_terms(head_config, &obj_head_config); obj = bpf__prepare_load(bpf_file_name, source); if (IS_ERR(obj)) { char errbuf[BUFSIZ]; err = PTR_ERR(obj); if (err == -ENOTSUP) snprintf(errbuf, sizeof(errbuf), "BPF support is not compiled"); else bpf__strerror_prepare_load(bpf_file_name, source, -err, errbuf, sizeof(errbuf)); parse_state->error->help = strdup("(add -v to see detail)"); parse_state->error->str = strdup(errbuf); return err; } err = parse_events_load_bpf_obj(parse_state, list, obj, head_config); if (err) return err; err = parse_events_config_bpf(parse_state, obj, &obj_head_config); /* * Caller doesn't know anything about obj_head_config, * so combine them together again before returnning. */ if (head_config) list_splice_tail(&obj_head_config, head_config); return err; } static int parse_breakpoint_type(const char *type, struct perf_event_attr *attr) { int i; for (i = 0; i < 3; i++) { if (!type || !type[i]) break; #define CHECK_SET_TYPE(bit) \ do { \ if (attr->bp_type & bit) \ return -EINVAL; \ else \ attr->bp_type |= bit; \ } while (0) switch (type[i]) { case 'r': CHECK_SET_TYPE(HW_BREAKPOINT_R); break; case 'w': CHECK_SET_TYPE(HW_BREAKPOINT_W); break; case 'x': CHECK_SET_TYPE(HW_BREAKPOINT_X); break; default: return -EINVAL; } } #undef CHECK_SET_TYPE if (!attr->bp_type) /* Default */ attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W; return 0; } int parse_events_add_breakpoint(struct list_head *list, int *idx, void *ptr, char *type, u64 len) { struct perf_event_attr attr; memset(&attr, 0, sizeof(attr)); attr.bp_addr = (unsigned long) ptr; if (parse_breakpoint_type(type, &attr)) return -EINVAL; /* Provide some defaults if len is not specified */ if (!len) { if (attr.bp_type == HW_BREAKPOINT_X) len = sizeof(long); else len = HW_BREAKPOINT_LEN_4; } attr.bp_len = len; attr.type = PERF_TYPE_BREAKPOINT; attr.sample_period = 1; return add_event(list, idx, &attr, NULL, NULL); } static int check_type_val(struct parse_events_term *term, struct parse_events_error *err, int type) { if (type == term->type_val) return 0; if (err) { err->idx = term->err_val; if (type == PARSE_EVENTS__TERM_TYPE_NUM) err->str = strdup("expected numeric value"); else err->str = strdup("expected string value"); } return -EINVAL; } /* * Update according to parse-events.l */ static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = { [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>", [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config", [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1", [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2", [PARSE_EVENTS__TERM_TYPE_NAME] = "name", [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period", [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq", [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type", [PARSE_EVENTS__TERM_TYPE_TIME] = "time", [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph", [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size", [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit", [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit", [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack", [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS] = "nr", [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite", [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite", [PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config", }; static bool config_term_shrinked; static bool config_term_avail(int term_type, struct parse_events_error *err) { if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) { err->str = strdup("Invalid term_type"); return false; } if (!config_term_shrinked) return true; switch (term_type) { case PARSE_EVENTS__TERM_TYPE_CONFIG: case PARSE_EVENTS__TERM_TYPE_CONFIG1: case PARSE_EVENTS__TERM_TYPE_CONFIG2: case PARSE_EVENTS__TERM_TYPE_NAME: case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: return true; default: if (!err) return false; /* term_type is validated so indexing is safe */ if (asprintf(&err->str, "'%s' is not usable in 'perf stat'", config_term_names[term_type]) < 0) err->str = NULL; return false; } } void parse_events__shrink_config_terms(void) { config_term_shrinked = true; } static int config_term_common(struct perf_event_attr *attr, struct parse_events_term *term, struct parse_events_error *err) { #define CHECK_TYPE_VAL(type) \ do { \ if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \ return -EINVAL; \ } while (0) switch (term->type_term) { case PARSE_EVENTS__TERM_TYPE_CONFIG: CHECK_TYPE_VAL(NUM); attr->config = term->val.num; break; case PARSE_EVENTS__TERM_TYPE_CONFIG1: CHECK_TYPE_VAL(NUM); attr->config1 = term->val.num; break; case PARSE_EVENTS__TERM_TYPE_CONFIG2: CHECK_TYPE_VAL(NUM); attr->config2 = term->val.num; break; case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: CHECK_TYPE_VAL(NUM); break; case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: CHECK_TYPE_VAL(NUM); break; case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: CHECK_TYPE_VAL(STR); if (strcmp(term->val.str, "no") && parse_branch_str(term->val.str, &attr->branch_sample_type)) { err->str = strdup("invalid branch sample type"); err->idx = term->err_val; return -EINVAL; } break; case PARSE_EVENTS__TERM_TYPE_TIME: CHECK_TYPE_VAL(NUM); if (term->val.num > 1) { err->str = strdup("expected 0 or 1"); err->idx = term->err_val; return -EINVAL; } break; case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: CHECK_TYPE_VAL(STR); break; case PARSE_EVENTS__TERM_TYPE_STACKSIZE: CHECK_TYPE_VAL(NUM); break; case PARSE_EVENTS__TERM_TYPE_INHERIT: CHECK_TYPE_VAL(NUM); break; case PARSE_EVENTS__TERM_TYPE_NOINHERIT: CHECK_TYPE_VAL(NUM); break; case PARSE_EVENTS__TERM_TYPE_OVERWRITE: CHECK_TYPE_VAL(NUM); break; case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: CHECK_TYPE_VAL(NUM); break; case PARSE_EVENTS__TERM_TYPE_NAME: CHECK_TYPE_VAL(STR); break; case PARSE_EVENTS__TERM_TYPE_MAX_STACK: CHECK_TYPE_VAL(NUM); break; case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: CHECK_TYPE_VAL(NUM); break; default: err->str = strdup("unknown term"); err->idx = term->err_term; err->help = parse_events_formats_error_string(NULL); return -EINVAL; } /* * Check term availbility after basic checking so * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered. * * If check availbility at the entry of this function, * user will see "'<sysfs term>' is not usable in 'perf stat'" * if an invalid config term is provided for legacy events * (for example, instructions/badterm/...), which is confusing. */ if (!config_term_avail(term->type_term, err)) return -EINVAL; return 0; #undef CHECK_TYPE_VAL } static int config_term_pmu(struct perf_event_attr *attr, struct parse_events_term *term, struct parse_events_error *err) { if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER || term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG) /* * Always succeed for sysfs terms, as we dont know * at this point what type they need to have. */ return 0; else return config_term_common(attr, term, err); } static int config_term_tracepoint(struct perf_event_attr *attr, struct parse_events_term *term, struct parse_events_error *err) { switch (term->type_term) { case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: case PARSE_EVENTS__TERM_TYPE_STACKSIZE: case PARSE_EVENTS__TERM_TYPE_INHERIT: case PARSE_EVENTS__TERM_TYPE_NOINHERIT: case PARSE_EVENTS__TERM_TYPE_MAX_STACK: case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: case PARSE_EVENTS__TERM_TYPE_OVERWRITE: case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: return config_term_common(attr, term, err); default: if (err) { err->idx = term->err_term; err->str = strdup("unknown term"); err->help = strdup("valid terms: call-graph,stack-size\n"); } return -EINVAL; } return 0; } static int config_attr(struct perf_event_attr *attr, struct list_head *head, struct parse_events_error *err, config_term_func_t config_term) { struct parse_events_term *term; list_for_each_entry(term, head, list) if (config_term(attr, term, err)) return -EINVAL; return 0; } static int get_config_terms(struct list_head *head_config, struct list_head *head_terms __maybe_unused) { #define ADD_CONFIG_TERM(__type, __name, __val) \ do { \ struct perf_evsel_config_term *__t; \ \ __t = zalloc(sizeof(*__t)); \ if (!__t) \ return -ENOMEM; \ \ INIT_LIST_HEAD(&__t->list); \ __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \ __t->val.__name = __val; \ __t->weak = term->weak; \ list_add_tail(&__t->list, head_terms); \ } while (0) struct parse_events_term *term; list_for_each_entry(term, head_config, list) { switch (term->type_term) { case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD: ADD_CONFIG_TERM(PERIOD, period, term->val.num); break; case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: ADD_CONFIG_TERM(FREQ, freq, term->val.num); break; case PARSE_EVENTS__TERM_TYPE_TIME: ADD_CONFIG_TERM(TIME, time, term->val.num); break; case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str); break; case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: ADD_CONFIG_TERM(BRANCH, branch, term->val.str); break; case PARSE_EVENTS__TERM_TYPE_STACKSIZE: ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num); break; case PARSE_EVENTS__TERM_TYPE_INHERIT: ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0); break; case PARSE_EVENTS__TERM_TYPE_NOINHERIT: ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1); break; case PARSE_EVENTS__TERM_TYPE_MAX_STACK: ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num); break; case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num); break; case PARSE_EVENTS__TERM_TYPE_OVERWRITE: ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0); break; case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1); break; case PARSE_EVENTS__TERM_TYPE_DRV_CFG: ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str); break; default: break; } } #undef ADD_EVSEL_CONFIG return 0; } int parse_events_add_tracepoint(struct list_head *list, int *idx, const char *sys, const char *event, struct parse_events_error *err, struct list_head *head_config) { if (head_config) { struct perf_event_attr attr; if (config_attr(&attr, head_config, err, config_term_tracepoint)) return -EINVAL; } if (strpbrk(sys, "*?")) return add_tracepoint_multi_sys(list, idx, sys, event, err, head_config); else return add_tracepoint_event(list, idx, sys, event, err, head_config); } int parse_events_add_numeric(struct parse_events_state *parse_state, struct list_head *list, u32 type, u64 config, struct list_head *head_config) { struct perf_event_attr attr; LIST_HEAD(config_terms); memset(&attr, 0, sizeof(attr)); attr.type = type; attr.config = config; if (head_config) { if (config_attr(&attr, head_config, parse_state->error, config_term_common)) return -EINVAL; if (get_config_terms(head_config, &config_terms)) return -ENOMEM; } return add_event(list, &parse_state->idx, &attr, get_config_name(head_config), &config_terms); } int parse_events_add_pmu(struct parse_events_state *parse_state, struct list_head *list, char *name, struct list_head *head_config, bool auto_merge_stats, bool use_alias) { struct perf_event_attr attr; struct perf_pmu_info info; struct perf_pmu *pmu; struct perf_evsel *evsel; struct parse_events_error *err = parse_state->error; bool use_uncore_alias; LIST_HEAD(config_terms); pmu = perf_pmu__find(name); if (!pmu) { if (asprintf(&err->str, "Cannot find PMU `%s'. Missing kernel support?", name) < 0) err->str = NULL; return -EINVAL; } if (pmu->default_config) { memcpy(&attr, pmu->default_config, sizeof(struct perf_event_attr)); } else { memset(&attr, 0, sizeof(attr)); } use_uncore_alias = (pmu->is_uncore && use_alias); if (!head_config) { attr.type = pmu->type; evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats); if (evsel) { evsel->pmu_name = name; evsel->use_uncore_alias = use_uncore_alias; return 0; } else { return -ENOMEM; } } if (perf_pmu__check_alias(pmu, head_config, &info)) return -EINVAL; /* * Configure hardcoded terms first, no need to check * return value when called with fail == 0 ;) */ if (config_attr(&attr, head_config, parse_state->error, config_term_pmu)) return -EINVAL; if (get_config_terms(head_config, &config_terms)) return -ENOMEM; if (perf_pmu__config(pmu, &attr, head_config, parse_state->error)) return -EINVAL; evsel = __add_event(list, &parse_state->idx, &attr, get_config_name(head_config), pmu, &config_terms, auto_merge_stats); if (evsel) { evsel->unit = info.unit; evsel->scale = info.scale; evsel->per_pkg = info.per_pkg; evsel->snapshot = info.snapshot; evsel->metric_expr = info.metric_expr; evsel->metric_name = info.metric_name; evsel->pmu_name = name; evsel->use_uncore_alias = use_uncore_alias; } return evsel ? 0 : -ENOMEM; } int parse_events_multi_pmu_add(struct parse_events_state *parse_state, char *str, struct list_head **listp) { struct list_head *head; struct parse_events_term *term; struct list_head *list; struct perf_pmu *pmu = NULL; int ok = 0; *listp = NULL; /* Add it for all PMUs that support the alias */ list = malloc(sizeof(struct list_head)); if (!list) return -1; INIT_LIST_HEAD(list); while ((pmu = perf_pmu__scan(pmu)) != NULL) { struct perf_pmu_alias *alias; list_for_each_entry(alias, &pmu->aliases, list) { if (!strcasecmp(alias->name, str)) { head = malloc(sizeof(struct list_head)); if (!head) return -1; INIT_LIST_HEAD(head); if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER, str, 1, false, &str, NULL) < 0) return -1; list_add_tail(&term->list, head); if (!parse_events_add_pmu(parse_state, list, pmu->name, head, true, true)) { pr_debug("%s -> %s/%s/\n", str, pmu->name, alias->str); ok++; } parse_events_terms__delete(head); } } } if (!ok) return -1; *listp = list; return 0; } int parse_events__modifier_group(struct list_head *list, char *event_mod) { return parse_events__modifier_event(list, event_mod, true); } /* * Check if the two uncore PMUs are from the same uncore block * The format of the uncore PMU name is uncore_#blockname_#pmuidx */ static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b) { char *end_a, *end_b; end_a = strrchr(pmu_name_a, '_'); end_b = strrchr(pmu_name_b, '_'); if (!end_a || !end_b) return false; if ((end_a - pmu_name_a) != (end_b - pmu_name_b)) return false; return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0); } static int parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list, struct parse_events_state *parse_state) { struct perf_evsel *evsel, *leader; uintptr_t *leaders; bool is_leader = true; int i, nr_pmu = 0, total_members, ret = 0; leader = list_first_entry(list, struct perf_evsel, node); evsel = list_last_entry(list, struct perf_evsel, node); total_members = evsel->idx - leader->idx + 1; leaders = calloc(total_members, sizeof(uintptr_t)); if (WARN_ON(!leaders)) return 0; /* * Going through the whole group and doing sanity check. * All members must use alias, and be from the same uncore block. * Also, storing the leader events in an array. */ __evlist__for_each_entry(list, evsel) { /* Only split the uncore group which members use alias */ if (!evsel->use_uncore_alias) goto out; /* The events must be from the same uncore block */ if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name)) goto out; if (!is_leader) continue; /* * If the event's PMU name starts to repeat, it must be a new * event. That can be used to distinguish the leader from * other members, even they have the same event name. */ if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) { is_leader = false; continue; } /* The name is always alias name */ WARN_ON(strcmp(leader->name, evsel->name)); /* Store the leader event for each PMU */ leaders[nr_pmu++] = (uintptr_t) evsel; } /* only one event alias */ if (nr_pmu == total_members) { parse_state->nr_groups--; goto handled; } /* * An uncore event alias is a joint name which means the same event * runs on all PMUs of a block. * Perf doesn't support mixed events from different PMUs in the same * group. The big group has to be split into multiple small groups * which only include the events from the same PMU. * * Here the uncore event aliases must be from the same uncore block. * The number of PMUs must be same for each alias. The number of new * small groups equals to the number of PMUs. * Setting the leader event for corresponding members in each group. */ i = 0; __evlist__for_each_entry(list, evsel) { if (i >= nr_pmu) i = 0; evsel->leader = (struct perf_evsel *) leaders[i++]; } /* The number of members and group name are same for each group */ for (i = 0; i < nr_pmu; i++) { evsel = (struct perf_evsel *) leaders[i]; evsel->nr_members = total_members / nr_pmu; evsel->group_name = name ? strdup(name) : NULL; } /* Take the new small groups into account */ parse_state->nr_groups += nr_pmu - 1; handled: ret = 1; out: free(leaders); return ret; } void parse_events__set_leader(char *name, struct list_head *list, struct parse_events_state *parse_state) { struct perf_evsel *leader; if (list_empty(list)) { WARN_ONCE(true, "WARNING: failed to set leader: empty list"); return; } if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state)) return; __perf_evlist__set_leader(list); leader = list_entry(list->next, struct perf_evsel, node); leader->group_name = name ? strdup(name) : NULL; } /* list_event is assumed to point to malloc'ed memory */ void parse_events_update_lists(struct list_head *list_event, struct list_head *list_all) { /* * Called for single event definition. Update the * 'all event' list, and reinit the 'single event' * list, for next event definition. */ list_splice_tail(list_event, list_all); free(list_event); } struct event_modifier { int eu; int ek; int eh; int eH; int eG; int eI; int precise; int precise_max; int exclude_GH; int sample_read; int pinned; int weak; }; static int get_event_modifier(struct event_modifier *mod, char *str, struct perf_evsel *evsel) { int eu = evsel ? evsel->attr.exclude_user : 0; int ek = evsel ? evsel->attr.exclude_kernel : 0; int eh = evsel ? evsel->attr.exclude_hv : 0; int eH = evsel ? evsel->attr.exclude_host : 0; int eG = evsel ? evsel->attr.exclude_guest : 0; int eI = evsel ? evsel->attr.exclude_idle : 0; int precise = evsel ? evsel->attr.precise_ip : 0; int precise_max = 0; int sample_read = 0; int pinned = evsel ? evsel->attr.pinned : 0; int exclude = eu | ek | eh; int exclude_GH = evsel ? evsel->exclude_GH : 0; int weak = 0; memset(mod, 0, sizeof(*mod)); while (*str) { if (*str == 'u') { if (!exclude) exclude = eu = ek = eh = 1; eu = 0; } else if (*str == 'k') { if (!exclude) exclude = eu = ek = eh = 1; ek = 0; } else if (*str == 'h') { if (!exclude) exclude = eu = ek = eh = 1; eh = 0; } else if (*str == 'G') { if (!exclude_GH) exclude_GH = eG = eH = 1; eG = 0; } else if (*str == 'H') { if (!exclude_GH) exclude_GH = eG = eH = 1; eH = 0; } else if (*str == 'I') { eI = 1; } else if (*str == 'p') { precise++; /* use of precise requires exclude_guest */ if (!exclude_GH) eG = 1; } else if (*str == 'P') { precise_max = 1; } else if (*str == 'S') { sample_read = 1; } else if (*str == 'D') { pinned = 1; } else if (*str == 'W') { weak = 1; } else break; ++str; } /* * precise ip: * * 0 - SAMPLE_IP can have arbitrary skid * 1 - SAMPLE_IP must have constant skid * 2 - SAMPLE_IP requested to have 0 skid * 3 - SAMPLE_IP must have 0 skid * * See also PERF_RECORD_MISC_EXACT_IP */ if (precise > 3) return -EINVAL; mod->eu = eu; mod->ek = ek; mod->eh = eh; mod->eH = eH; mod->eG = eG; mod->eI = eI; mod->precise = precise; mod->precise_max = precise_max; mod->exclude_GH = exclude_GH; mod->sample_read = sample_read; mod->pinned = pinned; mod->weak = weak; return 0; } /* * Basic modifier sanity check to validate it contains only one * instance of any modifier (apart from 'p') present. */ static int check_modifier(char *str) { char *p = str; /* The sizeof includes 0 byte as well. */ if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1)) return -1; while (*p) { if (*p != 'p' && strchr(p + 1, *p)) return -1; p++; } return 0; } int parse_events__modifier_event(struct list_head *list, char *str, bool add) { struct perf_evsel *evsel; struct event_modifier mod; if (str == NULL) return 0; if (check_modifier(str)) return -EINVAL; if (!add && get_event_modifier(&mod, str, NULL)) return -EINVAL; __evlist__for_each_entry(list, evsel) { if (add && get_event_modifier(&mod, str, evsel)) return -EINVAL; evsel->attr.exclude_user = mod.eu; evsel->attr.exclude_kernel = mod.ek; evsel->attr.exclude_hv = mod.eh; evsel->attr.precise_ip = mod.precise; evsel->attr.exclude_host = mod.eH; evsel->attr.exclude_guest = mod.eG; evsel->attr.exclude_idle = mod.eI; evsel->exclude_GH = mod.exclude_GH; evsel->sample_read = mod.sample_read; evsel->precise_max = mod.precise_max; evsel->weak_group = mod.weak; if (perf_evsel__is_group_leader(evsel)) evsel->attr.pinned = mod.pinned; } return 0; } int parse_events_name(struct list_head *list, char *name) { struct perf_evsel *evsel; __evlist__for_each_entry(list, evsel) { if (!evsel->name) evsel->name = strdup(name); } return 0; } static int comp_pmu(const void *p1, const void *p2) { struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1; struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2; return strcasecmp(pmu1->symbol, pmu2->symbol); } static void perf_pmu__parse_cleanup(void) { if (perf_pmu_events_list_num > 0) { struct perf_pmu_event_symbol *p; int i; for (i = 0; i < perf_pmu_events_list_num; i++) { p = perf_pmu_events_list + i; zfree(&p->symbol); } zfree(&perf_pmu_events_list); perf_pmu_events_list_num = 0; } } #define SET_SYMBOL(str, stype) \ do { \ p->symbol = str; \ if (!p->symbol) \ goto err; \ p->type = stype; \ } while (0) /* * Read the pmu events list from sysfs * Save it into perf_pmu_events_list */ static void perf_pmu__parse_init(void) { struct perf_pmu *pmu = NULL; struct perf_pmu_alias *alias; int len = 0; pmu = NULL; while ((pmu = perf_pmu__scan(pmu)) != NULL) { list_for_each_entry(alias, &pmu->aliases, list) { if (strchr(alias->name, '-')) len++; len++; } } if (len == 0) { perf_pmu_events_list_num = -1; return; } perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len); if (!perf_pmu_events_list) return; perf_pmu_events_list_num = len; len = 0; pmu = NULL; while ((pmu = perf_pmu__scan(pmu)) != NULL) { list_for_each_entry(alias, &pmu->aliases, list) { struct perf_pmu_event_symbol *p = perf_pmu_events_list + len; char *tmp = strchr(alias->name, '-'); if (tmp != NULL) { SET_SYMBOL(strndup(alias->name, tmp - alias->name), PMU_EVENT_SYMBOL_PREFIX); p++; SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX); len += 2; } else { SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL); len++; } } } qsort(perf_pmu_events_list, len, sizeof(struct perf_pmu_event_symbol), comp_pmu); return; err: perf_pmu__parse_cleanup(); } enum perf_pmu_event_symbol_type perf_pmu__parse_check(const char *name) { struct perf_pmu_event_symbol p, *r; /* scan kernel pmu events from sysfs if needed */ if (perf_pmu_events_list_num == 0) perf_pmu__parse_init(); /* * name "cpu" could be prefix of cpu-cycles or cpu// events. * cpu-cycles has been handled by hardcode. * So it must be cpu// events, not kernel pmu event. */ if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu")) return PMU_EVENT_SYMBOL_ERR; p.symbol = strdup(name); r = bsearch(&p, perf_pmu_events_list, (size_t) perf_pmu_events_list_num, sizeof(struct perf_pmu_event_symbol), comp_pmu); zfree(&p.symbol); return r ? r->type : PMU_EVENT_SYMBOL_ERR; } static int parse_events__scanner(const char *str, void *parse_state, int start_token) { YY_BUFFER_STATE buffer; void *scanner; int ret; ret = parse_events_lex_init_extra(start_token, &scanner); if (ret) return ret; buffer = parse_events__scan_string(str, scanner); #ifdef PARSER_DEBUG parse_events_debug = 1; #endif ret = parse_events_parse(parse_state, scanner); parse_events__flush_buffer(buffer, scanner); parse_events__delete_buffer(buffer, scanner); parse_events_lex_destroy(scanner); return ret; } /* * parse event config string, return a list of event terms. */ int parse_events_terms(struct list_head *terms, const char *str) { struct parse_events_state parse_state = { .terms = NULL, }; int ret; ret = parse_events__scanner(str, &parse_state, PE_START_TERMS); if (!ret) { list_splice(parse_state.terms, terms); zfree(&parse_state.terms); return 0; } parse_events_terms__delete(parse_state.terms); return ret; } int parse_events(struct perf_evlist *evlist, const char *str, struct parse_events_error *err) { struct parse_events_state parse_state = { .list = LIST_HEAD_INIT(parse_state.list), .idx = evlist->nr_entries, .error = err, .evlist = evlist, }; int ret; ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS); perf_pmu__parse_cleanup(); if (!ret) { struct perf_evsel *last; if (list_empty(&parse_state.list)) { WARN_ONCE(true, "WARNING: event parser found nothing\n"); return -1; } perf_evlist__splice_list_tail(evlist, &parse_state.list); evlist->nr_groups += parse_state.nr_groups; last = perf_evlist__last(evlist); last->cmdline_group_boundary = true; return 0; } /* * There are 2 users - builtin-record and builtin-test objects. * Both call perf_evlist__delete in case of error, so we dont * need to bother. */ return ret; } #define MAX_WIDTH 1000 static int get_term_width(void) { struct winsize ws; get_term_dimensions(&ws); return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col; } void parse_events_print_error(struct parse_events_error *err, const char *event) { const char *str = "invalid or unsupported event: "; char _buf[MAX_WIDTH]; char *buf = (char *) event; int idx = 0; if (err->str) { /* -2 for extra '' in the final fprintf */ int width = get_term_width() - 2; int len_event = strlen(event); int len_str, max_len, cut = 0; /* * Maximum error index indent, we will cut * the event string if it's bigger. */ int max_err_idx = 13; /* * Let's be specific with the message when * we have the precise error. */ str = "event syntax error: "; len_str = strlen(str); max_len = width - len_str; buf = _buf; /* We're cutting from the beginning. */ if (err->idx > max_err_idx) cut = err->idx - max_err_idx; strncpy(buf, event + cut, max_len); /* Mark cut parts with '..' on both sides. */ if (cut) buf[0] = buf[1] = '.'; if ((len_event - cut) > max_len) { buf[max_len - 1] = buf[max_len - 2] = '.'; buf[max_len] = 0; } idx = len_str + err->idx - cut; } fprintf(stderr, "%s'%s'\n", str, buf); if (idx) { fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str); if (err->help) fprintf(stderr, "\n%s\n", err->help); zfree(&err->str); zfree(&err->help); } } #undef MAX_WIDTH int parse_events_option(const struct option *opt, const char *str, int unset __maybe_unused) { struct perf_evlist *evlist = *(struct perf_evlist **)opt->value; struct parse_events_error err = { .idx = 0, }; int ret = parse_events(evlist, str, &err); if (ret) { parse_events_print_error(&err, str); fprintf(stderr, "Run 'perf list' for a list of valid events\n"); } return ret; } static int foreach_evsel_in_last_glob(struct perf_evlist *evlist, int (*func)(struct perf_evsel *evsel, const void *arg), const void *arg) { struct perf_evsel *last = NULL; int err; /* * Don't return when list_empty, give func a chance to report * error when it found last == NULL. * * So no need to WARN here, let *func do this. */ if (evlist->nr_entries > 0) last = perf_evlist__last(evlist); do { err = (*func)(last, arg); if (err) return -1; if (!last) return 0; if (last->node.prev == &evlist->entries) return 0; last = list_entry(last->node.prev, struct perf_evsel, node); } while (!last->cmdline_group_boundary); return 0; } static int set_filter(struct perf_evsel *evsel, const void *arg) { const char *str = arg; bool found = false; int nr_addr_filters = 0; struct perf_pmu *pmu = NULL; if (evsel == NULL) { fprintf(stderr, "--filter option should follow a -e tracepoint or HW tracer option\n"); return -1; } if (evsel->attr.type == PERF_TYPE_TRACEPOINT) { if (perf_evsel__append_tp_filter(evsel, str) < 0) { fprintf(stderr, "not enough memory to hold filter string\n"); return -1; } return 0; } while ((pmu = perf_pmu__scan(pmu)) != NULL) if (pmu->type == evsel->attr.type) { found = true; break; } if (found) perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters); if (!nr_addr_filters) { fprintf(stderr, "This CPU does not support address filtering\n"); return -1; } if (perf_evsel__append_addr_filter(evsel, str) < 0) { fprintf(stderr, "not enough memory to hold filter string\n"); return -1; } return 0; } int parse_filter(const struct option *opt, const char *str, int unset __maybe_unused) { struct perf_evlist *evlist = *(struct perf_evlist **)opt->value; return foreach_evsel_in_last_glob(evlist, set_filter, (const void *)str); } static int add_exclude_perf_filter(struct perf_evsel *evsel, const void *arg __maybe_unused) { char new_filter[64]; if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) { fprintf(stderr, "--exclude-perf option should follow a -e tracepoint option\n"); return -1; } snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid()); if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) { fprintf(stderr, "not enough memory to hold filter string\n"); return -1; } return 0; } int exclude_perf(const struct option *opt, const char *arg __maybe_unused, int unset __maybe_unused) { struct perf_evlist *evlist = *(struct perf_evlist **)opt->value; return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter, NULL); } static const char * const event_type_descriptors[] = { "Hardware event", "Software event", "Tracepoint event", "Hardware cache event", "Raw hardware event descriptor", "Hardware breakpoint", }; static int cmp_string(const void *a, const void *b) { const char * const *as = a; const char * const *bs = b; return strcmp(*as, *bs); } /* * Print the events from <debugfs_mount_point>/tracing/events */ void print_tracepoint_events(const char *subsys_glob, const char *event_glob, bool name_only) { DIR *sys_dir, *evt_dir; struct dirent *sys_dirent, *evt_dirent; char evt_path[MAXPATHLEN]; char *dir_path; char **evt_list = NULL; unsigned int evt_i = 0, evt_num = 0; bool evt_num_known = false; restart: sys_dir = tracing_events__opendir(); if (!sys_dir) return; if (evt_num_known) { evt_list = zalloc(sizeof(char *) * evt_num); if (!evt_list) goto out_close_sys_dir; } for_each_subsystem(sys_dir, sys_dirent) { if (subsys_glob != NULL && !strglobmatch(sys_dirent->d_name, subsys_glob)) continue; 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) { if (event_glob != NULL && !strglobmatch(evt_dirent->d_name, event_glob)) continue; if (!evt_num_known) { evt_num++; continue; } snprintf(evt_path, MAXPATHLEN, "%s:%s", sys_dirent->d_name, evt_dirent->d_name); evt_list[evt_i] = strdup(evt_path); if (evt_list[evt_i] == NULL) { put_events_file(dir_path); goto out_close_evt_dir; } evt_i++; } closedir(evt_dir); next: put_events_file(dir_path); } closedir(sys_dir); if (!evt_num_known) { evt_num_known = true; goto restart; } qsort(evt_list, evt_num, sizeof(char *), cmp_string); evt_i = 0; while (evt_i < evt_num) { if (name_only) { printf("%s ", evt_list[evt_i++]); continue; } printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[PERF_TYPE_TRACEPOINT]); } if (evt_num && pager_in_use()) printf("\n"); out_free: evt_num = evt_i; for (evt_i = 0; evt_i < evt_num; evt_i++) zfree(&evt_list[evt_i]); zfree(&evt_list); return; out_close_evt_dir: closedir(evt_dir); out_close_sys_dir: closedir(sys_dir); printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_TRACEPOINT]); if (evt_list) goto out_free; } /* * Check whether event is in <debugfs_mount_point>/tracing/events */ int is_valid_tracepoint(const char *event_string) { DIR *sys_dir, *evt_dir; struct dirent *sys_dirent, *evt_dirent; char evt_path[MAXPATHLEN]; char *dir_path; sys_dir = tracing_events__opendir(); if (!sys_dir) return 0; 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) { snprintf(evt_path, MAXPATHLEN, "%s:%s", sys_dirent->d_name, evt_dirent->d_name); if (!strcmp(evt_path, event_string)) { closedir(evt_dir); closedir(sys_dir); return 1; } } closedir(evt_dir); next: put_events_file(dir_path); } closedir(sys_dir); return 0; } static bool is_event_supported(u8 type, unsigned config) { bool ret = true; int open_return; struct perf_evsel *evsel; struct perf_event_attr attr = { .type = type, .config = config, .disabled = 1, }; struct thread_map *tmap = thread_map__new_by_tid(0); if (tmap == NULL) return false; evsel = perf_evsel__new(&attr); if (evsel) { open_return = perf_evsel__open(evsel, NULL, tmap); ret = open_return >= 0; if (open_return == -EACCES) { /* * This happens if the paranoid value * /proc/sys/kernel/perf_event_paranoid is set to 2 * Re-run with exclude_kernel set; we don't do that * by default as some ARM machines do not support it. * */ evsel->attr.exclude_kernel = 1; ret = perf_evsel__open(evsel, NULL, tmap) >= 0; } perf_evsel__delete(evsel); } return ret; } void print_sdt_events(const char *subsys_glob, const char *event_glob, bool name_only) { struct probe_cache *pcache; struct probe_cache_entry *ent; struct strlist *bidlist, *sdtlist; struct strlist_config cfg = {.dont_dupstr = true}; struct str_node *nd, *nd2; char *buf, *path, *ptr = NULL; bool show_detail = false; int ret; sdtlist = strlist__new(NULL, &cfg); if (!sdtlist) { pr_debug("Failed to allocate new strlist for SDT\n"); return; } bidlist = build_id_cache__list_all(true); if (!bidlist) { pr_debug("Failed to get buildids: %d\n", errno); return; } strlist__for_each_entry(nd, bidlist) { pcache = probe_cache__new(nd->s, NULL); if (!pcache) continue; list_for_each_entry(ent, &pcache->entries, node) { if (!ent->sdt) continue; if (subsys_glob && !strglobmatch(ent->pev.group, subsys_glob)) continue; if (event_glob && !strglobmatch(ent->pev.event, event_glob)) continue; ret = asprintf(&buf, "%s:%s@%s", ent->pev.group, ent->pev.event, nd->s); if (ret > 0) strlist__add(sdtlist, buf); } probe_cache__delete(pcache); } strlist__delete(bidlist); strlist__for_each_entry(nd, sdtlist) { buf = strchr(nd->s, '@'); if (buf) *(buf++) = '\0'; if (name_only) { printf("%s ", nd->s); continue; } nd2 = strlist__next(nd); if (nd2) { ptr = strchr(nd2->s, '@'); if (ptr) *ptr = '\0'; if (strcmp(nd->s, nd2->s) == 0) show_detail = true; } if (show_detail) { path = build_id_cache__origname(buf); ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf); if (ret > 0) { printf(" %-50s [%s]\n", buf, "SDT event"); free(buf); } } else printf(" %-50s [%s]\n", nd->s, "SDT event"); if (nd2) { if (strcmp(nd->s, nd2->s) != 0) show_detail = false; if (ptr) *ptr = '@'; } } strlist__delete(sdtlist); } int print_hwcache_events(const char *event_glob, bool name_only) { unsigned int type, op, i, evt_i = 0, evt_num = 0; char name[64]; char **evt_list = NULL; bool evt_num_known = false; restart: if (evt_num_known) { evt_list = zalloc(sizeof(char *) * evt_num); if (!evt_list) goto out_enomem; } for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) { for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) { /* skip invalid cache type */ if (!perf_evsel__is_cache_op_valid(type, op)) continue; for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) { __perf_evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name)); if (event_glob != NULL && !strglobmatch(name, event_glob)) continue; if (!is_event_supported(PERF_TYPE_HW_CACHE, type | (op << 8) | (i << 16))) continue; if (!evt_num_known) { evt_num++; continue; } evt_list[evt_i] = strdup(name); if (evt_list[evt_i] == NULL) goto out_enomem; evt_i++; } } } if (!evt_num_known) { evt_num_known = true; goto restart; } qsort(evt_list, evt_num, sizeof(char *), cmp_string); evt_i = 0; while (evt_i < evt_num) { if (name_only) { printf("%s ", evt_list[evt_i++]); continue; } printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[PERF_TYPE_HW_CACHE]); } if (evt_num && pager_in_use()) printf("\n"); out_free: evt_num = evt_i; for (evt_i = 0; evt_i < evt_num; evt_i++) zfree(&evt_list[evt_i]); zfree(&evt_list); return evt_num; out_enomem: printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]); if (evt_list) goto out_free; return evt_num; } void print_symbol_events(const char *event_glob, unsigned type, struct event_symbol *syms, unsigned max, bool name_only) { unsigned int i, evt_i = 0, evt_num = 0; char name[MAX_NAME_LEN]; char **evt_list = NULL; bool evt_num_known = false; restart: if (evt_num_known) { evt_list = zalloc(sizeof(char *) * evt_num); if (!evt_list) goto out_enomem; syms -= max; } for (i = 0; i < max; i++, syms++) { if (event_glob != NULL && syms->symbol != NULL && !(strglobmatch(syms->symbol, event_glob) || (syms->alias && strglobmatch(syms->alias, event_glob)))) continue; if (!is_event_supported(type, i)) continue; if (!evt_num_known) { evt_num++; continue; } if (!name_only && strlen(syms->alias)) snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias); else strlcpy(name, syms->symbol, MAX_NAME_LEN); evt_list[evt_i] = strdup(name); if (evt_list[evt_i] == NULL) goto out_enomem; evt_i++; } if (!evt_num_known) { evt_num_known = true; goto restart; } qsort(evt_list, evt_num, sizeof(char *), cmp_string); evt_i = 0; while (evt_i < evt_num) { if (name_only) { printf("%s ", evt_list[evt_i++]); continue; } printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]); } if (evt_num && pager_in_use()) printf("\n"); out_free: evt_num = evt_i; for (evt_i = 0; evt_i < evt_num; evt_i++) zfree(&evt_list[evt_i]); zfree(&evt_list); return; out_enomem: printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]); if (evt_list) goto out_free; } /* * Print the help text for the event symbols: */ void print_events(const char *event_glob, bool name_only, bool quiet_flag, bool long_desc, bool details_flag) { print_symbol_events(event_glob, PERF_TYPE_HARDWARE, event_symbols_hw, PERF_COUNT_HW_MAX, name_only); print_symbol_events(event_glob, PERF_TYPE_SOFTWARE, event_symbols_sw, PERF_COUNT_SW_MAX, name_only); print_hwcache_events(event_glob, name_only); print_pmu_events(event_glob, name_only, quiet_flag, long_desc, details_flag); if (event_glob != NULL) return; if (!name_only) { printf(" %-50s [%s]\n", "rNNN", event_type_descriptors[PERF_TYPE_RAW]); printf(" %-50s [%s]\n", "cpu/t1=v1[,t2=v2,t3 ...]/modifier", event_type_descriptors[PERF_TYPE_RAW]); if (pager_in_use()) printf(" (see 'man perf-list' on how to encode it)\n\n"); printf(" %-50s [%s]\n", "mem:<addr>[/len][:access]", event_type_descriptors[PERF_TYPE_BREAKPOINT]); if (pager_in_use()) printf("\n"); } print_tracepoint_events(NULL, NULL, name_only); print_sdt_events(NULL, NULL, name_only); metricgroup__print(true, true, NULL, name_only); } int parse_events__is_hardcoded_term(struct parse_events_term *term) { return term->type_term != PARSE_EVENTS__TERM_TYPE_USER; } static int new_term(struct parse_events_term **_term, struct parse_events_term *temp, char *str, u64 num) { struct parse_events_term *term; term = malloc(sizeof(*term)); if (!term) return -ENOMEM; *term = *temp; INIT_LIST_HEAD(&term->list); term->weak = false; switch (term->type_val) { case PARSE_EVENTS__TERM_TYPE_NUM: term->val.num = num; break; case PARSE_EVENTS__TERM_TYPE_STR: term->val.str = str; break; default: free(term); return -EINVAL; } *_term = term; return 0; } int parse_events_term__num(struct parse_events_term **term, int type_term, char *config, u64 num, bool no_value, void *loc_term_, void *loc_val_) { YYLTYPE *loc_term = loc_term_; YYLTYPE *loc_val = loc_val_; struct parse_events_term temp = { .type_val = PARSE_EVENTS__TERM_TYPE_NUM, .type_term = type_term, .config = config, .no_value = no_value, .err_term = loc_term ? loc_term->first_column : 0, .err_val = loc_val ? loc_val->first_column : 0, }; return new_term(term, &temp, NULL, num); } int parse_events_term__str(struct parse_events_term **term, int type_term, char *config, char *str, void *loc_term_, void *loc_val_) { YYLTYPE *loc_term = loc_term_; YYLTYPE *loc_val = loc_val_; struct parse_events_term temp = { .type_val = PARSE_EVENTS__TERM_TYPE_STR, .type_term = type_term, .config = config, .err_term = loc_term ? loc_term->first_column : 0, .err_val = loc_val ? loc_val->first_column : 0, }; return new_term(term, &temp, str, 0); } int parse_events_term__sym_hw(struct parse_events_term **term, char *config, unsigned idx) { struct event_symbol *sym; struct parse_events_term temp = { .type_val = PARSE_EVENTS__TERM_TYPE_STR, .type_term = PARSE_EVENTS__TERM_TYPE_USER, .config = config ?: (char *) "event", }; BUG_ON(idx >= PERF_COUNT_HW_MAX); sym = &event_symbols_hw[idx]; return new_term(term, &temp, (char *) sym->symbol, 0); } int parse_events_term__clone(struct parse_events_term **new, struct parse_events_term *term) { struct parse_events_term temp = { .type_val = term->type_val, .type_term = term->type_term, .config = term->config, .err_term = term->err_term, .err_val = term->err_val, }; return new_term(new, &temp, term->val.str, term->val.num); } int parse_events_copy_term_list(struct list_head *old, struct list_head **new) { struct parse_events_term *term, *n; int ret; if (!old) { *new = NULL; return 0; } *new = malloc(sizeof(struct list_head)); if (!*new) return -ENOMEM; INIT_LIST_HEAD(*new); list_for_each_entry (term, old, list) { ret = parse_events_term__clone(&n, term); if (ret) return ret; list_add_tail(&n->list, *new); } return 0; } void parse_events_terms__purge(struct list_head *terms) { struct parse_events_term *term, *h; list_for_each_entry_safe(term, h, terms, list) { if (term->array.nr_ranges) zfree(&term->array.ranges); list_del_init(&term->list); free(term); } } void parse_events_terms__delete(struct list_head *terms) { if (!terms) return; parse_events_terms__purge(terms); free(terms); } void parse_events__clear_array(struct parse_events_array *a) { zfree(&a->ranges); } void parse_events_evlist_error(struct parse_events_state *parse_state, int idx, const char *str) { struct parse_events_error *err = parse_state->error; if (!err) return; err->idx = idx; err->str = strdup(str); WARN_ONCE(!err->str, "WARNING: failed to allocate error string"); } static void config_terms_list(char *buf, size_t buf_sz) { int i; bool first = true; buf[0] = '\0'; for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) { const char *name = config_term_names[i]; if (!config_term_avail(i, NULL)) continue; if (!name) continue; if (name[0] == '<') continue; if (strlen(buf) + strlen(name) + 2 >= buf_sz) return; if (!first) strcat(buf, ","); else first = false; strcat(buf, name); } } /* * Return string contains valid config terms of an event. * @additional_terms: For terms such as PMU sysfs terms. */ char *parse_events_formats_error_string(char *additional_terms) { char *str; /* "no-overwrite" is the longest name */ char static_terms[__PARSE_EVENTS__TERM_TYPE_NR * (sizeof("no-overwrite") - 1)]; config_terms_list(static_terms, sizeof(static_terms)); /* valid terms */ if (additional_terms) { if (asprintf(&str, "valid terms: %s,%s", additional_terms, static_terms) < 0) goto fail; } else { if (asprintf(&str, "valid terms: %s", static_terms) < 0) goto fail; } return str; fail: return NULL; }
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