diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/util/parse-events.c | 3166 |
1 files changed, 3166 insertions, 0 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c new file mode 100644 index 000000000..c56a4d9c3 --- /dev/null +++ b/tools/perf/util/parse-events.c @@ -0,0 +1,3166 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/hw_breakpoint.h> +#include <linux/err.h> +#include <linux/zalloc.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 "build-id.h" +#include "evlist.h" +#include "evsel.h" +#include <subcmd/pager.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 "header.h" +#include "bpf-loader.h" +#include "debug.h" +#include <api/fs/tracing_path.h> +#include <perf/cpumap.h> +#include "parse-events-bison.h" +#define YY_EXTRA_TYPE void* +#include "parse-events-flex.h" +#include "pmu.h" +#include "thread_map.h" +#include "probe-file.h" +#include "asm/bug.h" +#include "util/parse-branch-options.h" +#include "metricgroup.h" +#include "util/evsel_config.h" +#include "util/event.h" +#include "util/pfm.h" +#include "perf.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 + +void parse_events__handle_error(struct parse_events_error *err, int idx, + char *str, char *help) +{ + if (WARN(!str, "WARNING: failed to provide error string\n")) { + free(help); + return; + } + switch (err->num_errors) { + case 0: + err->idx = idx; + err->str = str; + err->help = help; + break; + case 1: + err->first_idx = err->idx; + err->idx = idx; + err->first_str = err->str; + err->str = str; + err->first_help = err->help; + err->help = help; + break; + default: + pr_debug("Multiple errors dropping message: %s (%s)\n", + err->str, err->help); + free(err->str); + err->str = str; + free(err->help); + err->help = help; + break; + } + err->num_errors++; +} + +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; +} + +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 evsel * +__add_event(struct list_head *list, int *idx, + struct perf_event_attr *attr, + bool init_attr, + char *name, struct perf_pmu *pmu, + struct list_head *config_terms, bool auto_merge_stats, + const char *cpu_list) +{ + struct evsel *evsel; + struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) : + cpu_list ? perf_cpu_map__new(cpu_list) : NULL; + + if (pmu) + perf_pmu__warn_invalid_formats(pmu); + + if (pmu && attr->type == PERF_TYPE_RAW) + perf_pmu__warn_invalid_config(pmu, attr->config, name); + + if (init_attr) + event_attr_init(attr); + + evsel = evsel__new_idx(attr, *idx); + if (!evsel) { + perf_cpu_map__put(cpus); + return NULL; + } + + (*idx)++; + evsel->core.cpus = cpus; + evsel->core.own_cpus = perf_cpu_map__get(cpus); + evsel->core.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); + + if (list) + list_add_tail(&evsel->core.node, list); + + return evsel; +} + +struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr, + char *name, struct perf_pmu *pmu) +{ + return __add_event(NULL, &idx, attr, false, name, pmu, NULL, false, + NULL); +} + +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, true, name, NULL, config_terms, + false, NULL) ? 0 : -ENOMEM; +} + +static int add_event_tool(struct list_head *list, int *idx, + enum perf_tool_event tool_event) +{ + struct evsel *evsel; + struct perf_event_attr attr = { + .type = PERF_TYPE_SOFTWARE, + .config = PERF_COUNT_SW_DUMMY, + }; + + evsel = __add_event(list, idx, &attr, true, NULL, NULL, NULL, false, + "0"); + if (!evsel) + return -ENOMEM; + evsel->tool_event = tool_event; + if (tool_event == PERF_TOOL_DURATION_TIME) + evsel->unit = "ns"; + return 0; +} + +static int parse_aliases(char *str, const char *names[][EVSEL__MAX_ALIASES], int size) +{ + int i, j; + int n, longest = -1; + + for (i = 0; i < size; i++) { + for (j = 0; j < 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, 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, evsel__hw_cache_op, + PERF_COUNT_HW_CACHE_OP_MAX); + if (cache_op >= 0) { + if (!evsel__is_cache_op_valid(cache_type, cache_op)) + return -EINVAL; + continue; + } + } + + if (cache_result == -1) { + cache_result = parse_aliases(str, 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) +{ + const char *str; + 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: + str = "can't access trace events"; + break; + case ENOENT: + str = "unknown tracepoint"; + break; + default: + str = "failed to add tracepoint"; + break; + } + + tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name); + parse_events__handle_error(e, 0, strdup(str), 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 evsel *evsel = 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->core.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, struct bpf_object *obj, + 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 evsel *pos; + int err; + /* + * Check if we should add the event, i.e. if it is a TP but starts with a '!', + * then don't add the tracepoint, this will be used for something else, like + * adding to a BPF_MAP_TYPE_PROG_ARRAY. + * + * See tools/perf/examples/bpf/augmented_raw_syscalls.c + */ + if (group[0] == '!') + return 0; + + 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 evsel *evsel, *tmp; + + pr_debug("Failed to add BPF event %s:%s\n", + group, event); + list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) { + list_del_init(&evsel->core.node); + evsel__delete(evsel); + } + return err; + } + pr_debug("adding %s:%s\n", group, event); + + list_for_each_entry(pos, &new_evsels, core.node) { + pr_debug("adding %s:%s to %p\n", + group, event, pos); + pos->bpf_fd = fd; + pos->bpf_obj = obj; + } + 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_events__handle_error(parse_state->error, 0, + strdup(errbuf), strdup("(add -v to see detail)")); + 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) { + int err; + + if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) { + parse_events__handle_error(parse_state->error, term->err_term, + strdup("Invalid config term for BPF object"), + NULL); + return -EINVAL; + } + + err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos); + if (err) { + char errbuf[BUFSIZ]; + int idx; + + bpf__strerror_config_obj(obj, term, parse_state->evlist, + &error_pos, err, errbuf, + sizeof(errbuf)); + + if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE) + idx = term->err_val; + else + idx = term->err_term + error_pos; + + parse_events__handle_error(parse_state->error, idx, + strdup(errbuf), + 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)")); + 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_events__handle_error(parse_state->error, 0, + strdup(errbuf), strdup("(add -v to see detail)")); + 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, + u64 addr, char *type, u64 len) +{ + struct perf_event_attr attr; + + memset(&attr, 0, sizeof(attr)); + attr.bp_addr = addr; + + 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) { + parse_events__handle_error(err, term->err_val, + type == PARSE_EVENTS__TERM_TYPE_NUM + ? strdup("expected numeric value") + : strdup("expected string value"), + NULL); + } + 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", + [PARSE_EVENTS__TERM_TYPE_PERCORE] = "percore", + [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT] = "aux-output", + [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE] = "aux-sample-size", +}; + +static bool config_term_shrinked; + +static bool +config_term_avail(int term_type, struct parse_events_error *err) +{ + char *err_str; + + if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) { + parse_events__handle_error(err, -1, + strdup("Invalid term_type"), NULL); + 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: + case PARSE_EVENTS__TERM_TYPE_PERCORE: + 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) + parse_events__handle_error(err, -1, 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)) { + parse_events__handle_error(err, term->err_val, + strdup("invalid branch sample type"), + NULL); + return -EINVAL; + } + break; + case PARSE_EVENTS__TERM_TYPE_TIME: + CHECK_TYPE_VAL(NUM); + if (term->val.num > 1) { + parse_events__handle_error(err, term->err_val, + strdup("expected 0 or 1"), + NULL); + 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; + case PARSE_EVENTS__TERM_TYPE_PERCORE: + CHECK_TYPE_VAL(NUM); + if ((unsigned int)term->val.num > 1) { + parse_events__handle_error(err, term->err_val, + strdup("expected 0 or 1"), + NULL); + return -EINVAL; + } + break; + case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: + CHECK_TYPE_VAL(NUM); + break; + case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: + CHECK_TYPE_VAL(NUM); + if (term->val.num > UINT_MAX) { + parse_events__handle_error(err, term->err_val, + strdup("too big"), + NULL); + return -EINVAL; + } + break; + default: + parse_events__handle_error(err, term->err_term, + strdup("unknown term"), + 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: + case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: + case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: + return config_term_common(attr, term, err); + default: + if (err) { + parse_events__handle_error(err, term->err_term, + strdup("unknown term"), + 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, __weak) \ + struct evsel_config_term *__t; \ + \ + __t = zalloc(sizeof(*__t)); \ + if (!__t) \ + return -ENOMEM; \ + \ + INIT_LIST_HEAD(&__t->list); \ + __t->type = EVSEL__CONFIG_TERM_ ## __type; \ + __t->weak = __weak; \ + list_add_tail(&__t->list, head_terms) + +#define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak) \ +do { \ + ADD_CONFIG_TERM(__type, __weak); \ + __t->val.__name = __val; \ +} while (0) + +#define ADD_CONFIG_TERM_STR(__type, __val, __weak) \ +do { \ + ADD_CONFIG_TERM(__type, __weak); \ + __t->val.str = strdup(__val); \ + if (!__t->val.str) { \ + zfree(&__t); \ + return -ENOMEM; \ + } \ + __t->free_str = true; \ +} 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_VAL(PERIOD, period, term->val.num, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ: + ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_TIME: + ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_CALLGRAPH: + ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE: + ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_STACKSIZE: + ADD_CONFIG_TERM_VAL(STACK_USER, stack_user, + term->val.num, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_INHERIT: + ADD_CONFIG_TERM_VAL(INHERIT, inherit, + term->val.num ? 1 : 0, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_NOINHERIT: + ADD_CONFIG_TERM_VAL(INHERIT, inherit, + term->val.num ? 0 : 1, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_MAX_STACK: + ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack, + term->val.num, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS: + ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events, + term->val.num, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_OVERWRITE: + ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite, + term->val.num ? 1 : 0, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE: + ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite, + term->val.num ? 0 : 1, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_DRV_CFG: + ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_PERCORE: + ADD_CONFIG_TERM_VAL(PERCORE, percore, + term->val.num ? true : false, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT: + ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output, + term->val.num ? 1 : 0, term->weak); + break; + case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE: + ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size, + term->val.num, term->weak); + break; + default: + break; + } + } + return 0; +} + +/* + * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for + * each bit of attr->config that the user has changed. + */ +static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config, + struct list_head *head_terms) +{ + struct parse_events_term *term; + u64 bits = 0; + int type; + + list_for_each_entry(term, head_config, list) { + switch (term->type_term) { + case PARSE_EVENTS__TERM_TYPE_USER: + type = perf_pmu__format_type(&pmu->format, term->config); + if (type != PERF_PMU_FORMAT_VALUE_CONFIG) + continue; + bits |= perf_pmu__format_bits(&pmu->format, term->config); + break; + case PARSE_EVENTS__TERM_TYPE_CONFIG: + bits = ~(u64)0; + break; + default: + break; + } + } + + if (bits) + ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false); + +#undef ADD_CONFIG_TERM + 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_tool(struct parse_events_state *parse_state, + struct list_head *list, + enum perf_tool_event tool_event) +{ + return add_event_tool(list, &parse_state->idx, tool_event); +} + +static bool config_term_percore(struct list_head *config_terms) +{ + struct evsel_config_term *term; + + list_for_each_entry(term, config_terms, list) { + if (term->type == EVSEL__CONFIG_TERM_PERCORE) + return term->val.percore; + } + + return false; +} + +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 evsel *evsel; + struct parse_events_error *err = parse_state->error; + bool use_uncore_alias; + LIST_HEAD(config_terms); + + pmu = parse_state->fake_pmu ?: perf_pmu__find(name); + + if (verbose > 1 && !(pmu && pmu->selectable)) { + fprintf(stderr, "Attempting to add event pmu '%s' with '", + name); + if (head_config) { + struct parse_events_term *term; + + list_for_each_entry(term, head_config, list) { + fprintf(stderr, "%s,", term->config); + } + } + fprintf(stderr, "' that may result in non-fatal errors\n"); + } + + if (!pmu) { + char *err_str; + + if (asprintf(&err_str, + "Cannot find PMU `%s'. Missing kernel support?", + name) >= 0) + parse_events__handle_error(err, 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, true, NULL, + pmu, NULL, auto_merge_stats, NULL); + if (evsel) { + evsel->pmu_name = name ? strdup(name) : NULL; + evsel->use_uncore_alias = use_uncore_alias; + return 0; + } else { + return -ENOMEM; + } + } + + if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info)) + return -EINVAL; + + if (verbose > 1) { + fprintf(stderr, "After aliases, add event pmu '%s' with '", + name); + if (head_config) { + struct parse_events_term *term; + + list_for_each_entry(term, head_config, list) { + fprintf(stderr, "%s,", term->config); + } + } + fprintf(stderr, "' that may result in non-fatal errors\n"); + } + + /* + * 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; + + /* + * When using default config, record which bits of attr->config were + * changed by the user. + */ + if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms)) + return -ENOMEM; + + if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) { + struct evsel_config_term *pos, *tmp; + + list_for_each_entry_safe(pos, tmp, &config_terms, list) { + list_del_init(&pos->list); + if (pos->free_str) + zfree(&pos->val.str); + free(pos); + } + return -EINVAL; + } + + evsel = __add_event(list, &parse_state->idx, &attr, true, + get_config_name(head_config), pmu, + &config_terms, auto_merge_stats, NULL); + if (!evsel) + return -ENOMEM; + + evsel->pmu_name = name ? strdup(name) : NULL; + evsel->use_uncore_alias = use_uncore_alias; + evsel->percore = config_term_percore(&evsel->config_terms); + + if (parse_state->fake_pmu) + return 0; + + 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; + return 0; +} + +int parse_events_multi_pmu_add(struct parse_events_state *parse_state, + char *str, struct list_head **listp) +{ + 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)) { + struct list_head *head; + char *config; + + head = malloc(sizeof(struct list_head)); + if (!head) + return -1; + INIT_LIST_HEAD(head); + config = strdup(str); + if (!config) + return -1; + if (parse_events_term__num(&term, + PARSE_EVENTS__TERM_TYPE_USER, + config, 1, false, &config, + NULL) < 0) { + free(list); + free(config); + 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) { + free(list); + 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 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 evsel, core.node); + evsel = list_last_entry(list, struct evsel, core.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) && + !strcmp(leader->pmu_name, evsel->pmu_name)) { + is_leader = false; + continue; + } + + /* 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 evsel *) leaders[i++]; + } + + /* The number of members and group name are same for each group */ + for (i = 0; i < nr_pmu; i++) { + evsel = (struct evsel *) leaders[i]; + evsel->core.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 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 evsel, core.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; + int exclusive; +}; + +static int get_event_modifier(struct event_modifier *mod, char *str, + struct evsel *evsel) +{ + int eu = evsel ? evsel->core.attr.exclude_user : 0; + int ek = evsel ? evsel->core.attr.exclude_kernel : 0; + int eh = evsel ? evsel->core.attr.exclude_hv : 0; + int eH = evsel ? evsel->core.attr.exclude_host : 0; + int eG = evsel ? evsel->core.attr.exclude_guest : 0; + int eI = evsel ? evsel->core.attr.exclude_idle : 0; + int precise = evsel ? evsel->core.attr.precise_ip : 0; + int precise_max = 0; + int sample_read = 0; + int pinned = evsel ? evsel->core.attr.pinned : 0; + int exclusive = evsel ? evsel->core.attr.exclusive : 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; + if (!exclude_GH && !perf_guest) + eG = 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 == 'e') { + exclusive = 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; + mod->exclusive = exclusive; + + 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("ukhGHpppPSDIWe") - 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 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->core.attr.exclude_user = mod.eu; + evsel->core.attr.exclude_kernel = mod.ek; + evsel->core.attr.exclude_hv = mod.eh; + evsel->core.attr.precise_ip = mod.precise; + evsel->core.attr.exclude_host = mod.eH; + evsel->core.attr.exclude_guest = mod.eG; + evsel->core.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 (evsel__is_group_leader(evsel)) { + evsel->core.attr.pinned = mod.pinned; + evsel->core.attr.exclusive = mod.exclusive; + } + } + + return 0; +} + +int parse_events_name(struct list_head *list, char *name) +{ + struct 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(); +} + +/* + * This function injects special term in + * perf_pmu_events_list so the test code + * can check on this functionality. + */ +int perf_pmu__test_parse_init(void) +{ + struct perf_pmu_event_symbol *list; + + list = malloc(sizeof(*list) * 1); + if (!list) + return -ENOMEM; + + list->type = PMU_EVENT_SYMBOL; + list->symbol = strdup("read"); + + if (!list->symbol) { + free(list); + return -ENOMEM; + } + + perf_pmu_events_list = list; + perf_pmu_events_list_num = 1; + return 0; +} + +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, + struct parse_events_state *parse_state) +{ + YY_BUFFER_STATE buffer; + void *scanner; + int ret; + + ret = parse_events_lex_init_extra(parse_state, &scanner); + if (ret) + return ret; + + buffer = parse_events__scan_string(str, scanner); + +#ifdef PARSER_DEBUG + parse_events_debug = 1; + parse_events_set_debug(1, scanner); +#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, + .stoken = PE_START_TERMS, + }; + int ret; + + ret = parse_events__scanner(str, &parse_state); + perf_pmu__parse_cleanup(); + + 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 evlist *evlist, const char *str, + struct parse_events_error *err, struct perf_pmu *fake_pmu) +{ + struct parse_events_state parse_state = { + .list = LIST_HEAD_INIT(parse_state.list), + .idx = evlist->core.nr_entries, + .error = err, + .evlist = evlist, + .stoken = PE_START_EVENTS, + .fake_pmu = fake_pmu, + }; + int ret; + + ret = parse_events__scanner(str, &parse_state); + perf_pmu__parse_cleanup(); + + if (!ret && list_empty(&parse_state.list)) { + WARN_ONCE(true, "WARNING: event parser found nothing\n"); + return -1; + } + + /* + * Add list to the evlist even with errors to allow callers to clean up. + */ + perf_evlist__splice_list_tail(evlist, &parse_state.list); + + if (!ret) { + struct evsel *last; + + evlist->nr_groups += parse_state.nr_groups; + last = evlist__last(evlist); + last->cmdline_group_boundary = true; + + return 0; + } + + /* + * There are 2 users - builtin-record and builtin-test objects. + * Both call 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; +} + +static void __parse_events_print_error(int err_idx, const char *err_str, + const char *err_help, 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); + } +} + +void parse_events_print_error(struct parse_events_error *err, + const char *event) +{ + if (!err->num_errors) + return; + + __parse_events_print_error(err->idx, err->str, err->help, event); + zfree(&err->str); + zfree(&err->help); + + if (err->num_errors > 1) { + fputs("\nInitial error:\n", stderr); + __parse_events_print_error(err->first_idx, err->first_str, + err->first_help, event); + zfree(&err->first_str); + zfree(&err->first_help); + } +} + +#undef MAX_WIDTH + +int parse_events_option(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + struct evlist *evlist = *(struct evlist **)opt->value; + struct parse_events_error err; + int ret; + + bzero(&err, sizeof(err)); + 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; +} + +int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset) +{ + struct evlist **evlistp = opt->value; + int ret; + + if (*evlistp == NULL) { + *evlistp = evlist__new(); + + if (*evlistp == NULL) { + fprintf(stderr, "Not enough memory to create evlist\n"); + return -1; + } + } + + ret = parse_events_option(opt, str, unset); + if (ret) { + evlist__delete(*evlistp); + *evlistp = NULL; + } + + return ret; +} + +static int +foreach_evsel_in_last_glob(struct evlist *evlist, + int (*func)(struct evsel *evsel, + const void *arg), + const void *arg) +{ + struct 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->core.nr_entries > 0) + last = evlist__last(evlist); + + do { + err = (*func)(last, arg); + if (err) + return -1; + if (!last) + return 0; + + if (last->core.node.prev == &evlist->core.entries) + return 0; + last = list_entry(last->core.node.prev, struct evsel, core.node); + } while (!last->cmdline_group_boundary); + + return 0; +} + +static int set_filter(struct 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->core.attr.type == PERF_TYPE_TRACEPOINT) { + if (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->core.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 (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 evlist *evlist = *(struct evlist **)opt->value; + + return foreach_evsel_in_last_glob(evlist, set_filter, + (const void *)str); +} + +static int add_exclude_perf_filter(struct evsel *evsel, + const void *arg __maybe_unused) +{ + char new_filter[64]; + + if (evsel == NULL || evsel->core.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 (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 evlist *evlist = *(struct 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 evsel *evsel; + struct perf_event_attr attr = { + .type = type, + .config = config, + .disabled = 1, + }; + struct perf_thread_map *tmap = thread_map__new_by_tid(0); + + if (tmap == NULL) + return false; + + evsel = evsel__new(&attr); + if (evsel) { + open_return = 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->core.attr.exclude_kernel = 1; + ret = evsel__open(evsel, NULL, tmap) >= 0; + } + evsel__delete(evsel); + } + + perf_thread_map__put(tmap); + 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); + } + free(path); + } 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 (!evsel__is_cache_op_valid(type, op)) + continue; + + for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) { + __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; +} + +static void print_tool_event(const char *name, const char *event_glob, + bool name_only) +{ + if (event_glob && !strglobmatch(name, event_glob)) + return; + if (name_only) + printf("%s ", name); + else + printf(" %-50s [%s]\n", name, "Tool event"); + +} + +void print_tool_events(const char *event_glob, bool name_only) +{ + print_tool_event("duration_time", event_glob, name_only); + if (pager_in_use()) + printf("\n"); +} + +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, bool deprecated) +{ + 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_tool_events(event_glob, name_only); + + print_hwcache_events(event_glob, name_only); + + print_pmu_events(event_glob, name_only, quiet_flag, long_desc, + details_flag, deprecated); + + 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, details_flag); + + print_libpfm_events(name_only, long_desc); +} + +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; + char *str; + struct parse_events_term temp = { + .type_val = PARSE_EVENTS__TERM_TYPE_STR, + .type_term = PARSE_EVENTS__TERM_TYPE_USER, + .config = config, + }; + + if (!temp.config) { + temp.config = strdup("event"); + if (!temp.config) + return -ENOMEM; + } + BUG_ON(idx >= PERF_COUNT_HW_MAX); + sym = &event_symbols_hw[idx]; + + str = strdup(sym->symbol); + if (!str) + return -ENOMEM; + return new_term(term, &temp, str, 0); +} + +int parse_events_term__clone(struct parse_events_term **new, + struct parse_events_term *term) +{ + char *str; + struct parse_events_term temp = { + .type_val = term->type_val, + .type_term = term->type_term, + .config = NULL, + .err_term = term->err_term, + .err_val = term->err_val, + }; + + if (term->config) { + temp.config = strdup(term->config); + if (!temp.config) + return -ENOMEM; + } + if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) + return new_term(new, &temp, NULL, term->val.num); + + str = strdup(term->val.str); + if (!str) + return -ENOMEM; + return new_term(new, &temp, str, 0); +} + +void parse_events_term__delete(struct parse_events_term *term) +{ + if (term->array.nr_ranges) + zfree(&term->array.ranges); + + if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM) + zfree(&term->val.str); + + zfree(&term->config); + free(term); +} + +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) { + list_del_init(&term->list); + parse_events_term__delete(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) +{ + if (!parse_state->error) + return; + + parse_events__handle_error(parse_state->error, idx, strdup(str), NULL); +} + +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; +} |