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4d39c89f0b
linux/tools/perf/util/parse-events.c
Ingo Molnar 4d39c89f0b perf tools: Fix various typos in comments 
Fix ~124 single-word typos and a few spelling errors in the perf tooling code,
accumulated over the years.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210321113734.GA248990@gmail.com
Link: http://lore.kernel.org/lkml/20210323160915.GA61903@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2021-03-23 17:13:43 -03:00

3185 lines
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// 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 (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;
}
#ifdef HAVE_LIBBPF_SUPPORT
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, &param);
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;
/*
* Currently, all possible user config term
* belong to bpf object. parse_events__is_hardcoded_term()
* happens 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 returning.
*/
if (head_config)
list_splice_tail(&obj_head_config, head_config);
return err;
}
#else // HAVE_LIBBPF_SUPPORT
int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
struct list_head *list __maybe_unused,
struct bpf_object *obj __maybe_unused,
struct list_head *head_config __maybe_unused)
{
parse_events__handle_error(parse_state->error, 0,
strdup("BPF support is not compiled"),
strdup("Make sure libbpf-devel is available at build time."));
return -ENOTSUP;
}
int parse_events_load_bpf(struct parse_events_state *parse_state,
struct list_head *list __maybe_unused,
char *bpf_file_name __maybe_unused,
bool source __maybe_unused,
struct list_head *head_config __maybe_unused)
{
parse_events__handle_error(parse_state->error, 0,
strdup("BPF support is not compiled"),
strdup("Make sure libbpf-devel is available at build time."));
return -ENOTSUP;
}
#endif // HAVE_LIBBPF_SUPPORT
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 availability after basic checking so
* PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
*
* If check availability 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);
if (verbose > 1) {
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");
}
pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
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;
__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.
*/
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;
}
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