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linux-zen-desktop/tools/perf/util/parse-events.c

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// SPDX-License-Identifier: GPL-2.0
#include <linux/hw_breakpoint.h>
#include <linux/err.h>
#include <linux/list_sort.h>
#include <linux/zalloc.h>
#include <dirent.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include "term.h"
#include "evlist.h"
#include "evsel.h"
#include <subcmd/parse-options.h>
#include "parse-events.h"
#include "string2.h"
#include "strlist.h"
#include "bpf-loader.h"
#include "debug.h"
#include <api/fs/tracing_path.h>
#include <perf/cpumap.h>
#include <util/parse-events-bison.h>
#include <util/parse-events-flex.h>
#include "pmu.h"
#include "pmus.h"
#include "asm/bug.h"
#include "util/parse-branch-options.h"
#include "util/evsel_config.h"
#include "util/event.h"
#include "util/bpf-filter.h"
#include "util/util.h"
#include "tracepoint.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);
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 = "",
},
[PERF_COUNT_SW_CGROUP_SWITCHES] = {
.symbol = "cgroup-switches",
.alias = "",
},
};
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 char *get_config_str(struct list_head *head_terms, int type_term)
{
struct parse_events_term *term;
if (!head_terms)
return NULL;
list_for_each_entry(term, head_terms, list)
if (term->type_term == type_term)
return term->val.str;
return NULL;
}
static char *get_config_metric_id(struct list_head *head_terms)
{
return get_config_str(head_terms, PARSE_EVENTS__TERM_TYPE_METRIC_ID);
}
static char *get_config_name(struct list_head *head_terms)
{
return get_config_str(head_terms, PARSE_EVENTS__TERM_TYPE_NAME);
}
/**
* fix_raw - For each raw term see if there is an event (aka alias) in pmu that
* matches the raw's string value. If the string value matches an
* event then change the term to be an event, if not then change it to
* be a config term. For example, "read" may be an event of the PMU or
* a raw hex encoding of 0xead. The fix-up is done late so the PMU of
* the event can be determined and we don't need to scan all PMUs
* ahead-of-time.
* @config_terms: the list of terms that may contain a raw term.
* @pmu: the PMU to scan for events from.
*/
static void fix_raw(struct list_head *config_terms, struct perf_pmu *pmu)
{
struct parse_events_term *term;
list_for_each_entry(term, config_terms, list) {
struct perf_pmu_alias *alias;
bool matched = false;
if (term->type_term != PARSE_EVENTS__TERM_TYPE_RAW)
continue;
list_for_each_entry(alias, &pmu->aliases, list) {
if (!strcmp(alias->name, term->val.str)) {
free(term->config);
term->config = term->val.str;
term->type_val = PARSE_EVENTS__TERM_TYPE_NUM;
term->type_term = PARSE_EVENTS__TERM_TYPE_USER;
term->val.num = 1;
term->no_value = true;
matched = true;
break;
}
}
if (!matched) {
u64 num;
free(term->config);
term->config = strdup("config");
errno = 0;
num = strtoull(term->val.str + 1, NULL, 16);
assert(errno == 0);
free(term->val.str);
term->type_val = PARSE_EVENTS__TERM_TYPE_NUM;
term->type_term = PARSE_EVENTS__TERM_TYPE_CONFIG;
term->val.num = num;
term->no_value = false;
}
}
}
static struct evsel *
__add_event(struct list_head *list, int *idx,
struct perf_event_attr *attr,
bool init_attr,
const char *name, const char *metric_id, 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 || attr->type >= PERF_TYPE_MAX)) {
perf_pmu__warn_invalid_config(pmu, attr->config, name,
PERF_PMU_FORMAT_VALUE_CONFIG, "config");
perf_pmu__warn_invalid_config(pmu, attr->config1, name,
PERF_PMU_FORMAT_VALUE_CONFIG1, "config1");
perf_pmu__warn_invalid_config(pmu, attr->config2, name,
PERF_PMU_FORMAT_VALUE_CONFIG2, "config2");
perf_pmu__warn_invalid_config(pmu, attr->config3, name,
PERF_PMU_FORMAT_VALUE_CONFIG3, "config3");
}
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.requires_cpu = pmu ? pmu->is_uncore : false;
evsel->core.is_pmu_core = pmu ? pmu->is_core : false;
evsel->auto_merge_stats = auto_merge_stats;
evsel->pmu = pmu;
evsel->pmu_name = pmu && pmu->name ? strdup(pmu->name) : NULL;
if (name)
evsel->name = strdup(name);
if (metric_id)
evsel->metric_id = strdup(metric_id);
if (config_terms)
list_splice_init(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,
const char *name, const char *metric_id,
struct perf_pmu *pmu)
{
return __add_event(/*list=*/NULL, &idx, attr, /*init_attr=*/false, name,
metric_id, pmu, /*config_terms=*/NULL,
/*auto_merge_stats=*/false, /*cpu_list=*/NULL);
}
static int add_event(struct list_head *list, int *idx,
struct perf_event_attr *attr, const char *name,
const char *metric_id, struct list_head *config_terms)
{
return __add_event(list, idx, attr, /*init_attr*/true, name, metric_id,
/*pmu=*/NULL, config_terms,
/*auto_merge_stats=*/false, /*cpu_list=*/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, /*init_attr=*/true, /*name=*/NULL,
/*metric_id=*/NULL, /*pmu=*/NULL,
/*config_terms=*/NULL, /*auto_merge_stats=*/false,
/*cpu_list=*/"0");
if (!evsel)
return -ENOMEM;
evsel->tool_event = tool_event;
if (tool_event == PERF_TOOL_DURATION_TIME
|| tool_event == PERF_TOOL_USER_TIME
|| tool_event == PERF_TOOL_SYSTEM_TIME) {
free((char *)evsel->unit);
evsel->unit = strdup("ns");
}
return 0;
}
/**
* parse_aliases - search names for entries beginning or equalling str ignoring
* case. If mutliple entries in names match str then the longest
* is chosen.
* @str: The needle to look for.
* @names: The haystack to search.
* @size: The size of the haystack.
* @longest: Out argument giving the length of the matching entry.
*/
static int parse_aliases(const char *str, const char *const names[][EVSEL__MAX_ALIASES], int size,
int *longest)
{
*longest = -1;
for (int i = 0; i < size; i++) {
for (int j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) {
int 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);
/**
* parse_events__decode_legacy_cache - Search name for the legacy cache event
* name composed of 1, 2 or 3 hyphen
* separated sections. The first section is
* the cache type while the others are the
* optional op and optional result. To make
* life hard the names in the table also
* contain hyphens and the longest name
* should always be selected.
*/
int parse_events__decode_legacy_cache(const char *name, int extended_pmu_type, __u64 *config)
{
int len, cache_type = -1, cache_op = -1, cache_result = -1;
const char *name_end = &name[strlen(name) + 1];
const char *str = name;
cache_type = parse_aliases(str, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX, &len);
if (cache_type == -1)
return -EINVAL;
str += len + 1;
if (str < name_end) {
cache_op = parse_aliases(str, evsel__hw_cache_op,
PERF_COUNT_HW_CACHE_OP_MAX, &len);
if (cache_op >= 0) {
if (!evsel__is_cache_op_valid(cache_type, cache_op))
return -EINVAL;
str += len + 1;
} else {
cache_result = parse_aliases(str, evsel__hw_cache_result,
PERF_COUNT_HW_CACHE_RESULT_MAX, &len);
if (cache_result >= 0)
str += len + 1;
}
}
if (str < name_end) {
if (cache_op < 0) {
cache_op = parse_aliases(str, evsel__hw_cache_op,
PERF_COUNT_HW_CACHE_OP_MAX, &len);
if (cache_op >= 0) {
if (!evsel__is_cache_op_valid(cache_type, cache_op))
return -EINVAL;
}
} else if (cache_result < 0) {
cache_result = parse_aliases(str, evsel__hw_cache_result,
PERF_COUNT_HW_CACHE_RESULT_MAX, &len);
}
}
/*
* 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;
*config = cache_type | (cache_op << 8) | (cache_result << 16);
if (perf_pmus__supports_extended_type())
*config |= (__u64)extended_pmu_type << PERF_PMU_TYPE_SHIFT;
return 0;
}
/**
* parse_events__filter_pmu - returns false if a wildcard PMU should be
* considered, true if it should be filtered.
*/
bool parse_events__filter_pmu(const struct parse_events_state *parse_state,
const struct perf_pmu *pmu)
{
if (parse_state->pmu_filter == NULL)
return false;
if (pmu->name == NULL)
return true;
return strcmp(parse_state->pmu_filter, pmu->name) != 0;
}
int parse_events_add_cache(struct list_head *list, int *idx, const char *name,
struct parse_events_state *parse_state,
struct list_head *head_config)
{
struct perf_pmu *pmu = NULL;
bool found_supported = false;
const char *config_name = get_config_name(head_config);
const char *metric_id = get_config_metric_id(head_config);
/* Legacy cache events are only supported by core PMUs. */
while ((pmu = perf_pmus__scan_core(pmu)) != NULL) {
LIST_HEAD(config_terms);
struct perf_event_attr attr;
int ret;
if (parse_events__filter_pmu(parse_state, pmu))
continue;
memset(&attr, 0, sizeof(attr));
attr.type = PERF_TYPE_HW_CACHE;
ret = parse_events__decode_legacy_cache(name, pmu->type, &attr.config);
if (ret)
return ret;
found_supported = true;
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;
}
if (__add_event(list, idx, &attr, /*init_attr*/true, config_name ?: name,
metric_id, pmu, &config_terms, /*auto_merge_stats=*/false,
/*cpu_list=*/NULL) == NULL)
return -ENOMEM;
free_config_terms(&config_terms);
}
return found_supported ? 0 : -EINVAL;
}
#ifdef HAVE_LIBTRACEEVENT
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_error__handle(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;
}
#endif /* HAVE_LIBTRACEEVENT */
#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_error__handle(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_error__handle(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_error__handle(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_error__handle(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_error__handle(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_error__handle(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 parse_events_state *parse_state,
struct list_head *list,
u64 addr, char *type, u64 len,
struct list_head *head_config __maybe_unused)
{
struct perf_event_attr attr;
LIST_HEAD(config_terms);
const char *name;
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;
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;
}
name = get_config_name(head_config);
return add_event(list, &parse_state->idx, &attr, name, /*mertic_id=*/NULL,
&config_terms);
}
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_error__handle(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_CONFIG3] = "config3",
[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",
[PARSE_EVENTS__TERM_TYPE_METRIC_ID] = "metric-id",
[PARSE_EVENTS__TERM_TYPE_RAW] = "raw",
[PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE] = "legacy-cache",
[PARSE_EVENTS__TERM_TYPE_HARDWARE] = "hardware",
};
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_error__handle(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_CONFIG3:
case PARSE_EVENTS__TERM_TYPE_NAME:
case PARSE_EVENTS__TERM_TYPE_METRIC_ID:
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_error__handle(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_CONFIG3:
CHECK_TYPE_VAL(NUM);
attr->config3 = 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_error__handle(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_error__handle(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_METRIC_ID:
CHECK_TYPE_VAL(STR);
break;
case PARSE_EVENTS__TERM_TYPE_RAW:
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_error__handle(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_error__handle(err, term->err_val,
strdup("too big"),
NULL);
return -EINVAL;
}
break;
default:
parse_events_error__handle(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_LEGACY_CACHE) {
const struct perf_pmu *pmu = perf_pmus__find_by_type(attr->type);
if (!pmu) {
char *err_str;
if (asprintf(&err_str, "Failed to find PMU for type %d", attr->type) >= 0)
parse_events_error__handle(err, term->err_term,
err_str, /*help=*/NULL);
return -EINVAL;
}
if (perf_pmu__supports_legacy_cache(pmu)) {
attr->type = PERF_TYPE_HW_CACHE;
return parse_events__decode_legacy_cache(term->config, pmu->type,
&attr->config);
} else
term->type_term = PARSE_EVENTS__TERM_TYPE_USER;
}
if (term->type_term == PARSE_EVENTS__TERM_TYPE_HARDWARE) {
const struct perf_pmu *pmu = perf_pmus__find_by_type(attr->type);
if (!pmu) {
char *err_str;
if (asprintf(&err_str, "Failed to find PMU for type %d", attr->type) >= 0)
parse_events_error__handle(err, term->err_term,
err_str, /*help=*/NULL);
return -EINVAL;
}
attr->type = PERF_TYPE_HARDWARE;
attr->config = term->val.num;
if (perf_pmus__supports_extended_type())
attr->config |= (__u64)pmu->type << PERF_PMU_TYPE_SHIFT;
return 0;
}
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;
}
return config_term_common(attr, term, err);
}
#ifdef HAVE_LIBTRACEEVENT
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_error__handle(err, term->err_term,
strdup("unknown term"),
strdup("valid terms: call-graph,stack-size\n"));
}
return -EINVAL;
}
return 0;
}
#endif
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)
{
#ifdef HAVE_LIBTRACEEVENT
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);
#else
(void)list;
(void)idx;
(void)sys;
(void)event;
(void)head_config;
parse_events_error__handle(err, 0, strdup("unsupported tracepoint"),
strdup("libtraceevent is necessary for tracepoint support"));
return -1;
#endif
}
static int __parse_events_add_numeric(struct parse_events_state *parse_state,
struct list_head *list,
struct perf_pmu *pmu, u32 type, u32 extended_type,
u64 config, struct list_head *head_config)
{
struct perf_event_attr attr;
LIST_HEAD(config_terms);
const char *name, *metric_id;
int ret;
memset(&attr, 0, sizeof(attr));
attr.type = type;
attr.config = config;
if (extended_type && (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE)) {
assert(perf_pmus__supports_extended_type());
attr.config |= (u64)extended_type << PERF_PMU_TYPE_SHIFT;
}
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;
}
name = get_config_name(head_config);
metric_id = get_config_metric_id(head_config);
ret = __add_event(list, &parse_state->idx, &attr, /*init_attr*/true, name,
metric_id, pmu, &config_terms, /*auto_merge_stats=*/false,
/*cpu_list=*/NULL) ? 0 : -ENOMEM;
free_config_terms(&config_terms);
return ret;
}
int parse_events_add_numeric(struct parse_events_state *parse_state,
struct list_head *list,
u32 type, u64 config,
struct list_head *head_config,
bool wildcard)
{
struct perf_pmu *pmu = NULL;
bool found_supported = false;
/* Wildcards on numeric values are only supported by core PMUs. */
if (wildcard && perf_pmus__supports_extended_type()) {
while ((pmu = perf_pmus__scan_core(pmu)) != NULL) {
int ret;
found_supported = true;
if (parse_events__filter_pmu(parse_state, pmu))
continue;
ret = __parse_events_add_numeric(parse_state, list, pmu,
type, pmu->type,
config, head_config);
if (ret)
return ret;
}
if (found_supported)
return 0;
}
return __parse_events_add_numeric(parse_state, list, perf_pmus__find_by_type(type),
type, /*extended_type=*/0, config, head_config);
}
int parse_events_add_tool(struct parse_events_state *parse_state,
struct list_head *list,
int 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)
{
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;
LIST_HEAD(config_terms);
pmu = parse_state->fake_pmu ?: perf_pmus__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_error__handle(err, 0, err_str, NULL);
return -EINVAL;
}
if (head_config)
fix_raw(head_config, pmu);
if (pmu->default_config) {
memcpy(&attr, pmu->default_config,
sizeof(struct perf_event_attr));
} else {
memset(&attr, 0, sizeof(attr));
}
attr.type = pmu->type;
if (!head_config) {
evsel = __add_event(list, &parse_state->idx, &attr,
/*init_attr=*/true, /*name=*/NULL,
/*metric_id=*/NULL, pmu,
/*config_terms=*/NULL, auto_merge_stats,
/*cpu_list=*/NULL);
return evsel ? 0 : -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)) {
free_config_terms(&config_terms);
return -EINVAL;
}
evsel = __add_event(list, &parse_state->idx, &attr, /*init_attr=*/true,
get_config_name(head_config),
get_config_metric_id(head_config), pmu,
&config_terms, auto_merge_stats, /*cpu_list=*/NULL);
if (!evsel)
return -ENOMEM;
if (evsel->name)
evsel->use_config_name = true;
evsel->percore = config_term_percore(&evsel->config_terms);
if (parse_state->fake_pmu)
return 0;
free((char *)evsel->unit);
evsel->unit = strdup(info.unit);
evsel->scale = info.scale;
evsel->per_pkg = info.per_pkg;
evsel->snapshot = info.snapshot;
return 0;
}
int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
char *str, struct list_head *head,
struct list_head **listp)
{
struct parse_events_term *term;
struct list_head *list = NULL;
struct list_head *orig_head = NULL;
struct perf_pmu *pmu = NULL;
int ok = 0;
char *config;
*listp = NULL;
if (!head) {
head = malloc(sizeof(struct list_head));
if (!head)
goto out_err;
INIT_LIST_HEAD(head);
}
config = strdup(str);
if (!config)
goto out_err;
if (parse_events_term__num(&term,
PARSE_EVENTS__TERM_TYPE_USER,
config, 1, false, NULL,
NULL) < 0) {
free(config);
goto out_err;
}
list_add_tail(&term->list, head);
/* Add it for all PMUs that support the alias */
list = malloc(sizeof(struct list_head));
if (!list)
goto out_err;
INIT_LIST_HEAD(list);
while ((pmu = perf_pmus__scan(pmu)) != NULL) {
struct perf_pmu_alias *alias;
bool auto_merge_stats;
if (parse_events__filter_pmu(parse_state, pmu))
continue;
auto_merge_stats = perf_pmu__auto_merge_stats(pmu);
list_for_each_entry(alias, &pmu->aliases, list) {
if (!strcasecmp(alias->name, str)) {
parse_events_copy_term_list(head, &orig_head);
if (!parse_events_add_pmu(parse_state, list,
pmu->name, orig_head,
auto_merge_stats)) {
pr_debug("%s -> %s/%s/\n", str,
pmu->name, alias->str);
ok++;
}
parse_events_terms__delete(orig_head);
}
}
}
if (parse_state->fake_pmu) {
if (!parse_events_add_pmu(parse_state, list, str, head,
/*auto_merge_stats=*/true)) {
pr_debug("%s -> %s/%s/\n", str, "fake_pmu", str);
ok++;
}
}
out_err:
if (ok)
*listp = list;
else
free(list);
parse_events_terms__delete(head);
return ok ? 0 : -1;
}
int parse_events__modifier_group(struct list_head *list,
char *event_mod)
{
return parse_events__modifier_event(list, event_mod, true);
}
void parse_events__set_leader(char *name, struct list_head *list)
{
struct evsel *leader;
if (list_empty(list)) {
WARN_ONCE(true, "WARNING: failed to set leader: empty list");
return;
}
leader = list_first_entry(list, struct evsel, core.node);
__perf_evlist__set_leader(list, &leader->core);
leader->group_name = name;
}
/* 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;
int bpf_counter;
};
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;
int bpf_counter = 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 if (*str == 'b') {
bpf_counter = 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->bpf_counter = bpf_counter;
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("ukhGHpppPSDIWeb") - 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;
evsel->bpf_counter = mod.bpf_counter;
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, const char *name)
{
struct evsel *evsel;
__evlist__for_each_entry(list, evsel) {
if (!evsel->name)
evsel->name = strdup(name);
}
return 0;
}
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);
if (!ret) {
list_splice(parse_state.terms, terms);
zfree(&parse_state.terms);
return 0;
}
parse_events_terms__delete(parse_state.terms);
return ret;
}
static int evsel__compute_group_pmu_name(struct evsel *evsel,
const struct list_head *head)
{
struct evsel *leader = evsel__leader(evsel);
struct evsel *pos;
const char *group_pmu_name;
struct perf_pmu *pmu = evsel__find_pmu(evsel);
if (!pmu) {
/*
* For PERF_TYPE_HARDWARE and PERF_TYPE_HW_CACHE types the PMU
* is a core PMU, but in heterogeneous systems this is
* unknown. For now pick the first core PMU.
*/
pmu = perf_pmus__scan_core(NULL);
}
if (!pmu) {
pr_debug("No PMU found for '%s'\n", evsel__name(evsel));
return -EINVAL;
}
group_pmu_name = pmu->name;
/*
* Software events may be in a group with other uncore PMU events. Use
* the pmu_name of the first non-software event to avoid breaking the
* software event out of the group.
*
* Aux event leaders, like intel_pt, expect a group with events from
* other PMUs, so substitute the AUX event's PMU in this case.
*/
if (perf_pmu__is_software(pmu) || evsel__is_aux_event(leader)) {
struct perf_pmu *leader_pmu = evsel__find_pmu(leader);
if (!leader_pmu) {
/* As with determining pmu above. */
leader_pmu = perf_pmus__scan_core(NULL);
}
/*
* Starting with the leader, find the first event with a named
* non-software PMU. for_each_group_(member|evsel) isn't used as
* the list isn't yet sorted putting evsel's in the same group
* together.
*/
if (leader_pmu && !perf_pmu__is_software(leader_pmu)) {
group_pmu_name = leader_pmu->name;
} else if (leader->core.nr_members > 1) {
list_for_each_entry(pos, head, core.node) {
struct perf_pmu *pos_pmu;
if (pos == leader || evsel__leader(pos) != leader)
continue;
pos_pmu = evsel__find_pmu(pos);
if (!pos_pmu) {
/* As with determining pmu above. */
pos_pmu = perf_pmus__scan_core(NULL);
}
if (pos_pmu && !perf_pmu__is_software(pos_pmu)) {
group_pmu_name = pos_pmu->name;
break;
}
}
}
}
/* Assign the actual name taking care that the fake PMU lacks a name. */
evsel->group_pmu_name = strdup(group_pmu_name ?: "fake");
return evsel->group_pmu_name ? 0 : -ENOMEM;
}
__weak int arch_evlist__cmp(const struct evsel *lhs, const struct evsel *rhs)
{
/* Order by insertion index. */
return lhs->core.idx - rhs->core.idx;
}
static int evlist__cmp(void *_fg_idx, const struct list_head *l, const struct list_head *r)
{
const struct perf_evsel *lhs_core = container_of(l, struct perf_evsel, node);
const struct evsel *lhs = container_of(lhs_core, struct evsel, core);
const struct perf_evsel *rhs_core = container_of(r, struct perf_evsel, node);
const struct evsel *rhs = container_of(rhs_core, struct evsel, core);
int *force_grouped_idx = _fg_idx;
int lhs_sort_idx, rhs_sort_idx, ret;
const char *lhs_pmu_name, *rhs_pmu_name;
bool lhs_has_group, rhs_has_group;
/*
* First sort by grouping/leader. Read the leader idx only if the evsel
* is part of a group, by default ungrouped events will be sorted
* relative to grouped events based on where the first ungrouped event
* occurs. If both events don't have a group we want to fall-through to
* the arch specific sorting, that can reorder and fix things like
* Intel's topdown events.
*/
if (lhs_core->leader != lhs_core || lhs_core->nr_members > 1) {
lhs_has_group = true;
lhs_sort_idx = lhs_core->leader->idx;
} else {
lhs_has_group = false;
lhs_sort_idx = *force_grouped_idx != -1 && arch_evsel__must_be_in_group(lhs)
? *force_grouped_idx
: lhs_core->idx;
}
if (rhs_core->leader != rhs_core || rhs_core->nr_members > 1) {
rhs_has_group = true;
rhs_sort_idx = rhs_core->leader->idx;
} else {
rhs_has_group = false;
rhs_sort_idx = *force_grouped_idx != -1 && arch_evsel__must_be_in_group(rhs)
? *force_grouped_idx
: rhs_core->idx;
}
if (lhs_sort_idx != rhs_sort_idx)
return lhs_sort_idx - rhs_sort_idx;
/* Group by PMU if there is a group. Groups can't span PMUs. */
if (lhs_has_group && rhs_has_group) {
lhs_pmu_name = lhs->group_pmu_name;
rhs_pmu_name = rhs->group_pmu_name;
ret = strcmp(lhs_pmu_name, rhs_pmu_name);
if (ret)
return ret;
}
/* Architecture specific sorting. */
return arch_evlist__cmp(lhs, rhs);
}
static int parse_events__sort_events_and_fix_groups(struct list_head *list)
{
int idx = 0, force_grouped_idx = -1;
struct evsel *pos, *cur_leader = NULL;
struct perf_evsel *cur_leaders_grp = NULL;
bool idx_changed = false, cur_leader_force_grouped = false;
int orig_num_leaders = 0, num_leaders = 0;
int ret;
/*
* Compute index to insert ungrouped events at. Place them where the
* first ungrouped event appears.
*/
list_for_each_entry(pos, list, core.node) {
const struct evsel *pos_leader = evsel__leader(pos);
ret = evsel__compute_group_pmu_name(pos, list);
if (ret)
return ret;
if (pos == pos_leader)
orig_num_leaders++;
/*
* Ensure indexes are sequential, in particular for multiple
* event lists being merged. The indexes are used to detect when
* the user order is modified.
*/
pos->core.idx = idx++;
/* Remember an index to sort all forced grouped events together to. */
if (force_grouped_idx == -1 && pos == pos_leader && pos->core.nr_members < 2 &&
arch_evsel__must_be_in_group(pos))
force_grouped_idx = pos->core.idx;
}
/* Sort events. */
list_sort(&force_grouped_idx, list, evlist__cmp);
/*
* Recompute groups, splitting for PMUs and adding groups for events
* that require them.
*/
idx = 0;
list_for_each_entry(pos, list, core.node) {
const struct evsel *pos_leader = evsel__leader(pos);
const char *pos_pmu_name = pos->group_pmu_name;
const char *cur_leader_pmu_name;
bool pos_force_grouped = force_grouped_idx != -1 &&
arch_evsel__must_be_in_group(pos);
/* Reset index and nr_members. */
if (pos->core.idx != idx)
idx_changed = true;
pos->core.idx = idx++;
pos->core.nr_members = 0;
/*
* Set the group leader respecting the given groupings and that
* groups can't span PMUs.
*/
if (!cur_leader)
cur_leader = pos;
cur_leader_pmu_name = cur_leader->group_pmu_name;
if ((cur_leaders_grp != pos->core.leader &&
(!pos_force_grouped || !cur_leader_force_grouped)) ||
strcmp(cur_leader_pmu_name, pos_pmu_name)) {
/* Event is for a different group/PMU than last. */
cur_leader = pos;
/*
* Remember the leader's group before it is overwritten,
* so that later events match as being in the same
* group.
*/
cur_leaders_grp = pos->core.leader;
/*
* Avoid forcing events into groups with events that
* don't need to be in the group.
*/
cur_leader_force_grouped = pos_force_grouped;
}
if (pos_leader != cur_leader) {
/* The leader changed so update it. */
evsel__set_leader(pos, cur_leader);
}
}
list_for_each_entry(pos, list, core.node) {
struct evsel *pos_leader = evsel__leader(pos);
if (pos == pos_leader)
num_leaders++;
pos_leader->core.nr_members++;
}
return (idx_changed || num_leaders != orig_num_leaders) ? 1 : 0;
}
int __parse_events(struct evlist *evlist, const char *str, const char *pmu_filter,
struct parse_events_error *err, struct perf_pmu *fake_pmu,
bool warn_if_reordered)
{
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,
.pmu_filter = pmu_filter,
.match_legacy_cache_terms = true,
};
int ret, ret2;
ret = parse_events__scanner(str, &parse_state);
if (!ret && list_empty(&parse_state.list)) {
WARN_ONCE(true, "WARNING: event parser found nothing\n");
return -1;
}
ret2 = parse_events__sort_events_and_fix_groups(&parse_state.list);
if (ret2 < 0)
return ret;
if (ret2 && warn_if_reordered && !parse_state.wild_card_pmus)
pr_warning("WARNING: events were regrouped to match PMUs\n");
/*
* 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;
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;
}
int parse_event(struct evlist *evlist, const char *str)
{
struct parse_events_error err;
int ret;
parse_events_error__init(&err);
ret = parse_events(evlist, str, &err);
parse_events_error__exit(&err);
return ret;
}
void parse_events_error__init(struct parse_events_error *err)
{
bzero(err, sizeof(*err));
}
void parse_events_error__exit(struct parse_events_error *err)
{
zfree(&err->str);
zfree(&err->help);
zfree(&err->first_str);
zfree(&err->first_help);
}
void parse_events_error__handle(struct parse_events_error *err, int idx,
char *str, char *help)
{
if (WARN(!str || !err, "WARNING: failed to provide error string or struct\n"))
goto out_free;
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++;
return;
out_free:
free(str);
free(help);
}
#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_error__print(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_error__print(struct parse_events_error *err,
const char *event)
{
if (!err->num_errors)
return;
__parse_events_error__print(err->idx, err->str, err->help, event);
if (err->num_errors > 1) {
fputs("\nInitial error:\n", stderr);
__parse_events_error__print(err->first_idx, err->first_str,
err->first_help, event);
}
}
#undef MAX_WIDTH
int parse_events_option(const struct option *opt, const char *str,
int unset __maybe_unused)
{
struct parse_events_option_args *args = opt->value;
struct parse_events_error err;
int ret;
parse_events_error__init(&err);
ret = __parse_events(*args->evlistp, str, args->pmu_filter, &err,
/*fake_pmu=*/NULL, /*warn_if_reordered=*/true);
if (ret) {
parse_events_error__print(&err, str);
fprintf(stderr, "Run 'perf list' for a list of valid events\n");
}
parse_events_error__exit(&err);
return ret;
}
int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
{
struct parse_events_option_args *args = opt->value;
int ret;
if (*args->evlistp == NULL) {
*args->evlistp = evlist__new();
if (*args->evlistp == NULL) {
fprintf(stderr, "Not enough memory to create evlist\n");
return -1;
}
}
ret = parse_events_option(opt, str, unset);
if (ret) {
evlist__delete(*args->evlistp);
*args->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_pmus__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)
return perf_bpf_filter__parse(&evsel->bpf_filters, str);
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);
}
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 ? : strdup(config_term_names[type_term]),
.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__term(struct parse_events_term **term,
int term_lhs, int term_rhs,
void *loc_term, void *loc_val)
{
return parse_events_term__str(term, term_lhs, NULL,
strdup(config_term_names[term_rhs]),
loc_term, loc_val);
}
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_error__handle(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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