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parse-events.c
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parse-events.c
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#include <linux/hw_breakpoint.h>
#include <linux/err.h>
#include "util.h"
#include "../perf.h"
#include "evlist.h"
#include "evsel.h"
#include "parse-options.h"
#include "parse-events.h"
#include "exec_cmd.h"
#include "string.h"
#include "symbol.h"
#include "cache.h"
#include "header.h"
#include "debug.h"
#include <api/fs/tracing_path.h>
#include "parse-events-bison.h"
#define YY_EXTRA_TYPE int
#include "parse-events-flex.h"
#include "pmu.h"
#include "thread_map.h"
#include "cpumap.h"
#include "asm/bug.h"
#define MAX_NAME_LEN 100
#ifdef PARSER_DEBUG
extern int parse_events_debug;
#endif
int parse_events_parse(void *data, void *scanner);
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 = "",
},
};
#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, sys_next) \
while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \
if (sys_dirent.d_type == DT_DIR && \
(strcmp(sys_dirent.d_name, ".")) && \
(strcmp(sys_dirent.d_name, "..")))
static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
{
char evt_path[MAXPATHLEN];
int fd;
snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
sys_dir->d_name, evt_dir->d_name);
fd = open(evt_path, O_RDONLY);
if (fd < 0)
return -EINVAL;
close(fd);
return 0;
}
#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) \
while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \
if (evt_dirent.d_type == DT_DIR && \
(strcmp(evt_dirent.d_name, ".")) && \
(strcmp(evt_dirent.d_name, "..")) && \
(!tp_event_has_id(&sys_dirent, &evt_dirent)))
#define MAX_EVENT_LENGTH 512
struct tracepoint_path *tracepoint_id_to_path(u64 config)
{
struct tracepoint_path *path = NULL;
DIR *sys_dir, *evt_dir;
struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
char id_buf[24];
int fd;
u64 id;
char evt_path[MAXPATHLEN];
char dir_path[MAXPATHLEN];
sys_dir = opendir(tracing_events_path);
if (!sys_dir)
return NULL;
for_each_subsystem(sys_dir, sys_dirent, sys_next) {
snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
sys_dirent.d_name);
evt_dir = opendir(dir_path);
if (!evt_dir)
continue;
for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
snprintf(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) {
closedir(evt_dir);
closedir(sys_dir);
path = zalloc(sizeof(*path));
path->system = malloc(MAX_EVENT_LENGTH);
if (!path->system) {
free(path);
return NULL;
}
path->name = malloc(MAX_EVENT_LENGTH);
if (!path->name) {
zfree(&path->system);
free(path);
return NULL;
}
strncpy(path->system, sys_dirent.d_name,
MAX_EVENT_LENGTH);
strncpy(path->name, evt_dirent.d_name,
MAX_EVENT_LENGTH);
return path;
}
}
closedir(evt_dir);
}
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);
free(path);
path = NULL;
}
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 struct perf_evsel *
__add_event(struct list_head *list, int *idx,
struct perf_event_attr *attr,
char *name, struct cpu_map *cpus,
struct list_head *config_terms)
{
struct perf_evsel *evsel;
event_attr_init(attr);
evsel = perf_evsel__new_idx(attr, (*idx)++);
if (!evsel)
return NULL;
if (cpus)
evsel->cpus = cpu_map__get(cpus);
if (name)
evsel->name = strdup(name);
if (config_terms)
list_splice(config_terms, &evsel->config_terms);
list_add_tail(&evsel->node, list);
return evsel;
}
static int add_event(struct list_head *list, int *idx,
struct perf_event_attr *attr, char *name,
struct list_head *config_terms)
{
return __add_event(list, idx, attr, name, NULL, config_terms) ? 0 : -ENOMEM;
}
static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
{
int i, j;
int n, longest = -1;
for (i = 0; i < size; i++) {
for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
n = strlen(names[i][j]);
if (n > longest && !strncasecmp(str, names[i][j], n))
longest = n;
}
if (longest > 0)
return i;
}
return -1;
}
int parse_events_add_cache(struct list_head *list, int *idx,
char *type, char *op_result1, char *op_result2)
{
struct perf_event_attr attr;
char name[MAX_NAME_LEN];
int cache_type = -1, cache_op = -1, cache_result = -1;
char *op_result[2] = { op_result1, op_result2 };
int i, n;
/*
* No fallback - if we cannot get a clear cache type
* then bail out:
*/
cache_type = parse_aliases(type, perf_evsel__hw_cache,
PERF_COUNT_HW_CACHE_MAX);
if (cache_type == -1)
return -EINVAL;
n = snprintf(name, MAX_NAME_LEN, "%s", type);
for (i = 0; (i < 2) && (op_result[i]); i++) {
char *str = op_result[i];
n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
if (cache_op == -1) {
cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
PERF_COUNT_HW_CACHE_OP_MAX);
if (cache_op >= 0) {
if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
return -EINVAL;
continue;
}
}
if (cache_result == -1) {
cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
PERF_COUNT_HW_CACHE_RESULT_MAX);
if (cache_result >= 0)
continue;
}
}
/*
* Fall back to reads:
*/
if (cache_op == -1)
cache_op = PERF_COUNT_HW_CACHE_OP_READ;
/*
* Fall back to accesses:
*/
if (cache_result == -1)
cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
memset(&attr, 0, sizeof(attr));
attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
attr.type = PERF_TYPE_HW_CACHE;
return add_event(list, idx, &attr, name, NULL);
}
static void tracepoint_error(struct parse_events_error *error, int err,
char *sys, char *name)
{
char help[BUFSIZ];
/*
* We get error directly from syscall errno ( > 0),
* or from encoded pointer's error ( < 0).
*/
err = abs(err);
switch (err) {
case EACCES:
error->str = strdup("can't access trace events");
break;
case ENOENT:
error->str = strdup("unknown tracepoint");
break;
default:
error->str = strdup("failed to add tracepoint");
break;
}
tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
error->help = strdup(help);
}
static int add_tracepoint(struct list_head *list, int *idx,
char *sys_name, char *evt_name,
struct parse_events_error *error __maybe_unused)
{
struct perf_evsel *evsel;
evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
if (IS_ERR(evsel)) {
tracepoint_error(error, PTR_ERR(evsel), sys_name, evt_name);
return PTR_ERR(evsel);
}
list_add_tail(&evsel->node, list);
return 0;
}
static int add_tracepoint_multi_event(struct list_head *list, int *idx,
char *sys_name, char *evt_name,
struct parse_events_error *error)
{
char evt_path[MAXPATHLEN];
struct dirent *evt_ent;
DIR *evt_dir;
int ret = 0;
snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
evt_dir = opendir(evt_path);
if (!evt_dir) {
tracepoint_error(error, 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;
ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name, error);
}
closedir(evt_dir);
return ret;
}
static int add_tracepoint_event(struct list_head *list, int *idx,
char *sys_name, char *evt_name,
struct parse_events_error *error)
{
return strpbrk(evt_name, "*?") ?
add_tracepoint_multi_event(list, idx, sys_name, evt_name, error) :
add_tracepoint(list, idx, sys_name, evt_name, error);
}
static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
char *sys_name, char *evt_name,
struct parse_events_error *error)
{
struct dirent *events_ent;
DIR *events_dir;
int ret = 0;
events_dir = opendir(tracing_events_path);
if (!events_dir) {
tracepoint_error(error, 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, error);
}
closedir(events_dir);
return ret;
}
int parse_events_add_tracepoint(struct list_head *list, int *idx,
char *sys, char *event,
struct parse_events_error *error)
{
if (strpbrk(sys, "*?"))
return add_tracepoint_multi_sys(list, idx, sys, event, error);
else
return add_tracepoint_event(list, idx, sys, event, error);
}
static int
parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
{
int i;
for (i = 0; i < 3; i++) {
if (!type || !type[i])
break;
#define CHECK_SET_TYPE(bit) \
do { \
if (attr->bp_type & bit) \
return -EINVAL; \
else \
attr->bp_type |= bit; \
} while (0)
switch (type[i]) {
case 'r':
CHECK_SET_TYPE(HW_BREAKPOINT_R);
break;
case 'w':
CHECK_SET_TYPE(HW_BREAKPOINT_W);
break;
case 'x':
CHECK_SET_TYPE(HW_BREAKPOINT_X);
break;
default:
return -EINVAL;
}
}
#undef CHECK_SET_TYPE
if (!attr->bp_type) /* Default */
attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
return 0;
}
int parse_events_add_breakpoint(struct list_head *list, int *idx,
void *ptr, char *type, u64 len)
{
struct perf_event_attr attr;
memset(&attr, 0, sizeof(attr));
attr.bp_addr = (unsigned long) ptr;
if (parse_breakpoint_type(type, &attr))
return -EINVAL;
/* Provide some defaults if len is not specified */
if (!len) {
if (attr.bp_type == HW_BREAKPOINT_X)
len = sizeof(long);
else
len = HW_BREAKPOINT_LEN_4;
}
attr.bp_len = len;
attr.type = PERF_TYPE_BREAKPOINT;
attr.sample_period = 1;
return add_event(list, idx, &attr, NULL, NULL);
}
static int check_type_val(struct parse_events_term *term,
struct parse_events_error *err,
int type)
{
if (type == term->type_val)
return 0;
if (err) {
err->idx = term->err_val;
if (type == PARSE_EVENTS__TERM_TYPE_NUM)
err->str = strdup("expected numeric value");
else
err->str = strdup("expected string value");
}
return -EINVAL;
}
static int config_term(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_USER:
/*
* Always succeed for sysfs terms, as we dont know
* at this point what type they need to have.
*/
return 0;
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:
/*
* TODO uncomment when the field is available
* attr->branch_sample_type = term->val.num;
*/
break;
case PARSE_EVENTS__TERM_TYPE_TIME:
CHECK_TYPE_VAL(NUM);
if (term->val.num > 1) {
err->str = strdup("expected 0 or 1");
err->idx = term->err_val;
return -EINVAL;
}
break;
case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
CHECK_TYPE_VAL(STR);
break;
case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
CHECK_TYPE_VAL(NUM);
break;
case PARSE_EVENTS__TERM_TYPE_NAME:
CHECK_TYPE_VAL(STR);
break;
default:
return -EINVAL;
}
return 0;
#undef CHECK_TYPE_VAL
}
static int config_attr(struct perf_event_attr *attr,
struct list_head *head,
struct parse_events_error *err)
{
struct parse_events_term *term;
list_for_each_entry(term, head, list)
if (config_term(attr, term, err))
return -EINVAL;
return 0;
}
static int get_config_terms(struct list_head *head_config,
struct list_head *head_terms __maybe_unused)
{
#define ADD_CONFIG_TERM(__type, __name, __val) \
do { \
struct perf_evsel_config_term *__t; \
\
__t = zalloc(sizeof(*__t)); \
if (!__t) \
return -ENOMEM; \
\
INIT_LIST_HEAD(&__t->list); \
__t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
__t->val.__name = __val; \
list_add_tail(&__t->list, head_terms); \
} while (0)
struct parse_events_term *term;
list_for_each_entry(term, head_config, list) {
switch (term->type_term) {
case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
ADD_CONFIG_TERM(PERIOD, period, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
ADD_CONFIG_TERM(FREQ, freq, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_TIME:
ADD_CONFIG_TERM(TIME, time, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
break;
case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
break;
default:
break;
}
}
#undef ADD_EVSEL_CONFIG
return 0;
}
int parse_events_add_numeric(struct parse_events_evlist *data,
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, data->error))
return -EINVAL;
if (get_config_terms(head_config, &config_terms))
return -ENOMEM;
}
return add_event(list, &data->idx, &attr, NULL, &config_terms);
}
static int parse_events__is_name_term(struct parse_events_term *term)
{
return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
}
static char *pmu_event_name(struct list_head *head_terms)
{
struct parse_events_term *term;
list_for_each_entry(term, head_terms, list)
if (parse_events__is_name_term(term))
return term->val.str;
return NULL;
}
int parse_events_add_pmu(struct parse_events_evlist *data,
struct list_head *list, char *name,
struct list_head *head_config)
{
struct perf_event_attr attr;
struct perf_pmu_info info;
struct perf_pmu *pmu;
struct perf_evsel *evsel;
LIST_HEAD(config_terms);
pmu = perf_pmu__find(name);
if (!pmu)
return -EINVAL;
if (pmu->default_config) {
memcpy(&attr, pmu->default_config,
sizeof(struct perf_event_attr));
} else {
memset(&attr, 0, sizeof(attr));
}
if (!head_config) {
attr.type = pmu->type;
evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
return evsel ? 0 : -ENOMEM;
}
if (perf_pmu__check_alias(pmu, head_config, &info))
return -EINVAL;
/*
* Configure hardcoded terms first, no need to check
* return value when called with fail == 0 ;)
*/
if (config_attr(&attr, head_config, data->error))
return -EINVAL;
if (get_config_terms(head_config, &config_terms))
return -ENOMEM;
if (perf_pmu__config(pmu, &attr, head_config, data->error))
return -EINVAL;
evsel = __add_event(list, &data->idx, &attr,
pmu_event_name(head_config), pmu->cpus,
&config_terms);
if (evsel) {
evsel->unit = info.unit;
evsel->scale = info.scale;
evsel->per_pkg = info.per_pkg;
evsel->snapshot = info.snapshot;
}
return evsel ? 0 : -ENOMEM;
}
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 perf_evsel *leader;
__perf_evlist__set_leader(list);
leader = list_entry(list->next, struct perf_evsel, node);
leader->group_name = name ? strdup(name) : NULL;
}
/* list_event is assumed to point to malloc'ed memory */
void parse_events_update_lists(struct list_head *list_event,
struct list_head *list_all)
{
/*
* Called for single event definition. Update the
* 'all event' list, and reinit the 'single event'
* list, for next event definition.
*/
list_splice_tail(list_event, list_all);
free(list_event);
}
struct event_modifier {
int eu;
int ek;
int eh;
int eH;
int eG;
int eI;
int precise;
int exclude_GH;
int sample_read;
int pinned;
};
static int get_event_modifier(struct event_modifier *mod, char *str,
struct perf_evsel *evsel)
{
int eu = evsel ? evsel->attr.exclude_user : 0;
int ek = evsel ? evsel->attr.exclude_kernel : 0;
int eh = evsel ? evsel->attr.exclude_hv : 0;
int eH = evsel ? evsel->attr.exclude_host : 0;
int eG = evsel ? evsel->attr.exclude_guest : 0;
int eI = evsel ? evsel->attr.exclude_idle : 0;
int precise = evsel ? evsel->attr.precise_ip : 0;
int sample_read = 0;
int pinned = evsel ? evsel->attr.pinned : 0;
int exclude = eu | ek | eh;
int exclude_GH = evsel ? evsel->exclude_GH : 0;
memset(mod, 0, sizeof(*mod));
while (*str) {
if (*str == 'u') {
if (!exclude)
exclude = eu = ek = eh = 1;
eu = 0;
} else if (*str == 'k') {
if (!exclude)
exclude = eu = ek = eh = 1;
ek = 0;
} else if (*str == 'h') {
if (!exclude)
exclude = eu = ek = eh = 1;
eh = 0;
} else if (*str == 'G') {
if (!exclude_GH)
exclude_GH = eG = eH = 1;
eG = 0;
} else if (*str == 'H') {
if (!exclude_GH)
exclude_GH = eG = eH = 1;
eH = 0;
} else if (*str == 'I') {
eI = 1;
} else if (*str == 'p') {
precise++;
/* use of precise requires exclude_guest */
if (!exclude_GH)
eG = 1;
} else if (*str == 'S') {
sample_read = 1;
} else if (*str == 'D') {
pinned = 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->exclude_GH = exclude_GH;
mod->sample_read = sample_read;
mod->pinned = pinned;
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("ukhGHpppSDI") - 1))
return -1;
while (*p) {
if (*p != 'p' && strchr(p + 1, *p))
return -1;
p++;
}
return 0;
}
int parse_events__modifier_event(struct list_head *list, char *str, bool add)
{
struct perf_evsel *evsel;
struct event_modifier mod;
if (str == NULL)
return 0;
if (check_modifier(str))
return -EINVAL;
if (!add && get_event_modifier(&mod, str, NULL))
return -EINVAL;
__evlist__for_each(list, evsel) {
if (add && get_event_modifier(&mod, str, evsel))
return -EINVAL;
evsel->attr.exclude_user = mod.eu;
evsel->attr.exclude_kernel = mod.ek;
evsel->attr.exclude_hv = mod.eh;
evsel->attr.precise_ip = mod.precise;
evsel->attr.exclude_host = mod.eH;
evsel->attr.exclude_guest = mod.eG;
evsel->attr.exclude_idle = mod.eI;
evsel->exclude_GH = mod.exclude_GH;
evsel->sample_read = mod.sample_read;
if (perf_evsel__is_group_leader(evsel))
evsel->attr.pinned = mod.pinned;
}
return 0;
}
int parse_events_name(struct list_head *list, char *name)