![Masami Hiramatsu](/assets/img/avatar_default.png)
Make pmu_formats_string() to check return value of strbuf APIs so that it can detect errors in it. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20160510054744.6158.37810.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1109 lines
22 KiB
C
1109 lines
22 KiB
C
#include <linux/list.h>
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#include <linux/compiler.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdarg.h>
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#include <dirent.h>
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#include <api/fs/fs.h>
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#include <locale.h>
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#include "util.h"
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#include "pmu.h"
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#include "parse-events.h"
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#include "cpumap.h"
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struct perf_pmu_format {
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char *name;
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int value;
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DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
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struct list_head list;
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};
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#define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/"
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int perf_pmu_parse(struct list_head *list, char *name);
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extern FILE *perf_pmu_in;
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static LIST_HEAD(pmus);
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/*
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* Parse & process all the sysfs attributes located under
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* the directory specified in 'dir' parameter.
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*/
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int perf_pmu__format_parse(char *dir, struct list_head *head)
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{
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struct dirent *evt_ent;
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DIR *format_dir;
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int ret = 0;
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format_dir = opendir(dir);
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if (!format_dir)
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return -EINVAL;
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while (!ret && (evt_ent = readdir(format_dir))) {
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char path[PATH_MAX];
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char *name = evt_ent->d_name;
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FILE *file;
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if (!strcmp(name, ".") || !strcmp(name, ".."))
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continue;
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snprintf(path, PATH_MAX, "%s/%s", dir, name);
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ret = -EINVAL;
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file = fopen(path, "r");
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if (!file)
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break;
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perf_pmu_in = file;
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ret = perf_pmu_parse(head, name);
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fclose(file);
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}
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closedir(format_dir);
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return ret;
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}
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/*
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* Reading/parsing the default pmu format definition, which should be
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* located at:
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* /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
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*/
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static int pmu_format(const char *name, struct list_head *format)
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{
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struct stat st;
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char path[PATH_MAX];
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const char *sysfs = sysfs__mountpoint();
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if (!sysfs)
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return -1;
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snprintf(path, PATH_MAX,
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"%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
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if (stat(path, &st) < 0)
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return 0; /* no error if format does not exist */
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if (perf_pmu__format_parse(path, format))
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return -1;
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return 0;
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}
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static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name)
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{
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struct stat st;
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ssize_t sret;
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char scale[128];
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int fd, ret = -1;
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char path[PATH_MAX];
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char *lc;
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snprintf(path, PATH_MAX, "%s/%s.scale", dir, name);
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fd = open(path, O_RDONLY);
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if (fd == -1)
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return -1;
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if (fstat(fd, &st) < 0)
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goto error;
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sret = read(fd, scale, sizeof(scale)-1);
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if (sret < 0)
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goto error;
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if (scale[sret - 1] == '\n')
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scale[sret - 1] = '\0';
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else
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scale[sret] = '\0';
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/*
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* save current locale
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*/
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lc = setlocale(LC_NUMERIC, NULL);
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/*
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* The lc string may be allocated in static storage,
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* so get a dynamic copy to make it survive setlocale
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* call below.
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*/
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lc = strdup(lc);
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if (!lc) {
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ret = -ENOMEM;
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goto error;
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}
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/*
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* force to C locale to ensure kernel
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* scale string is converted correctly.
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* kernel uses default C locale.
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*/
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setlocale(LC_NUMERIC, "C");
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alias->scale = strtod(scale, NULL);
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/* restore locale */
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setlocale(LC_NUMERIC, lc);
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free(lc);
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ret = 0;
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error:
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close(fd);
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return ret;
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}
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static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name)
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{
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char path[PATH_MAX];
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ssize_t sret;
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int fd;
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snprintf(path, PATH_MAX, "%s/%s.unit", dir, name);
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fd = open(path, O_RDONLY);
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if (fd == -1)
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return -1;
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sret = read(fd, alias->unit, UNIT_MAX_LEN);
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if (sret < 0)
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goto error;
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close(fd);
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if (alias->unit[sret - 1] == '\n')
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alias->unit[sret - 1] = '\0';
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else
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alias->unit[sret] = '\0';
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return 0;
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error:
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close(fd);
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alias->unit[0] = '\0';
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return -1;
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}
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static int
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perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name)
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{
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char path[PATH_MAX];
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int fd;
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snprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name);
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fd = open(path, O_RDONLY);
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if (fd == -1)
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return -1;
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close(fd);
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alias->per_pkg = true;
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return 0;
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}
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static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,
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char *dir, char *name)
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{
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char path[PATH_MAX];
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int fd;
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snprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name);
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fd = open(path, O_RDONLY);
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if (fd == -1)
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return -1;
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alias->snapshot = true;
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close(fd);
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return 0;
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}
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static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
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char *desc __maybe_unused, char *val)
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{
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struct perf_pmu_alias *alias;
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int ret;
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alias = malloc(sizeof(*alias));
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if (!alias)
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return -ENOMEM;
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INIT_LIST_HEAD(&alias->terms);
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alias->scale = 1.0;
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alias->unit[0] = '\0';
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alias->per_pkg = false;
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alias->snapshot = false;
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ret = parse_events_terms(&alias->terms, val);
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if (ret) {
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pr_err("Cannot parse alias %s: %d\n", val, ret);
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free(alias);
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return ret;
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}
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alias->name = strdup(name);
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if (dir) {
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/*
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* load unit name and scale if available
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*/
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perf_pmu__parse_unit(alias, dir, name);
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perf_pmu__parse_scale(alias, dir, name);
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perf_pmu__parse_per_pkg(alias, dir, name);
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perf_pmu__parse_snapshot(alias, dir, name);
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}
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list_add_tail(&alias->list, list);
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return 0;
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}
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static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file)
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{
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char buf[256];
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int ret;
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ret = fread(buf, 1, sizeof(buf), file);
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if (ret == 0)
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return -EINVAL;
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buf[ret] = 0;
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return __perf_pmu__new_alias(list, dir, name, NULL, buf);
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}
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static inline bool pmu_alias_info_file(char *name)
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{
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size_t len;
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len = strlen(name);
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if (len > 5 && !strcmp(name + len - 5, ".unit"))
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return true;
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if (len > 6 && !strcmp(name + len - 6, ".scale"))
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return true;
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if (len > 8 && !strcmp(name + len - 8, ".per-pkg"))
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return true;
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if (len > 9 && !strcmp(name + len - 9, ".snapshot"))
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return true;
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return false;
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}
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/*
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* Process all the sysfs attributes located under the directory
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* specified in 'dir' parameter.
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*/
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static int pmu_aliases_parse(char *dir, struct list_head *head)
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{
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struct dirent *evt_ent;
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DIR *event_dir;
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event_dir = opendir(dir);
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if (!event_dir)
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return -EINVAL;
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while ((evt_ent = readdir(event_dir))) {
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char path[PATH_MAX];
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char *name = evt_ent->d_name;
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FILE *file;
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if (!strcmp(name, ".") || !strcmp(name, ".."))
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continue;
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/*
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* skip info files parsed in perf_pmu__new_alias()
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*/
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if (pmu_alias_info_file(name))
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continue;
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snprintf(path, PATH_MAX, "%s/%s", dir, name);
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file = fopen(path, "r");
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if (!file) {
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pr_debug("Cannot open %s\n", path);
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continue;
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}
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if (perf_pmu__new_alias(head, dir, name, file) < 0)
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pr_debug("Cannot set up %s\n", name);
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fclose(file);
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}
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closedir(event_dir);
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return 0;
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}
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/*
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* Reading the pmu event aliases definition, which should be located at:
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* /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
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*/
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static int pmu_aliases(const char *name, struct list_head *head)
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{
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struct stat st;
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char path[PATH_MAX];
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const char *sysfs = sysfs__mountpoint();
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if (!sysfs)
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return -1;
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snprintf(path, PATH_MAX,
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"%s/bus/event_source/devices/%s/events", sysfs, name);
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if (stat(path, &st) < 0)
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return 0; /* no error if 'events' does not exist */
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if (pmu_aliases_parse(path, head))
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return -1;
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return 0;
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}
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static int pmu_alias_terms(struct perf_pmu_alias *alias,
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struct list_head *terms)
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{
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struct parse_events_term *term, *cloned;
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LIST_HEAD(list);
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int ret;
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list_for_each_entry(term, &alias->terms, list) {
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ret = parse_events_term__clone(&cloned, term);
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if (ret) {
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parse_events_terms__purge(&list);
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return ret;
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}
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list_add_tail(&cloned->list, &list);
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}
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list_splice(&list, terms);
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return 0;
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}
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/*
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* Reading/parsing the default pmu type value, which should be
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* located at:
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* /sys/bus/event_source/devices/<dev>/type as sysfs attribute.
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*/
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static int pmu_type(const char *name, __u32 *type)
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{
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struct stat st;
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char path[PATH_MAX];
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FILE *file;
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int ret = 0;
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const char *sysfs = sysfs__mountpoint();
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if (!sysfs)
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return -1;
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snprintf(path, PATH_MAX,
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"%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name);
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if (stat(path, &st) < 0)
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return -1;
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file = fopen(path, "r");
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if (!file)
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return -EINVAL;
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if (1 != fscanf(file, "%u", type))
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ret = -1;
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fclose(file);
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return ret;
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}
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/* Add all pmus in sysfs to pmu list: */
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static void pmu_read_sysfs(void)
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{
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char path[PATH_MAX];
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DIR *dir;
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struct dirent *dent;
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const char *sysfs = sysfs__mountpoint();
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if (!sysfs)
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return;
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snprintf(path, PATH_MAX,
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"%s" EVENT_SOURCE_DEVICE_PATH, sysfs);
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dir = opendir(path);
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if (!dir)
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return;
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while ((dent = readdir(dir))) {
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if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
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continue;
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/* add to static LIST_HEAD(pmus): */
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perf_pmu__find(dent->d_name);
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}
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closedir(dir);
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}
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static struct cpu_map *pmu_cpumask(const char *name)
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{
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struct stat st;
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char path[PATH_MAX];
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FILE *file;
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struct cpu_map *cpus;
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const char *sysfs = sysfs__mountpoint();
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if (!sysfs)
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return NULL;
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snprintf(path, PATH_MAX,
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"%s/bus/event_source/devices/%s/cpumask", sysfs, name);
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if (stat(path, &st) < 0)
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return NULL;
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file = fopen(path, "r");
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if (!file)
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return NULL;
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cpus = cpu_map__read(file);
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fclose(file);
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return cpus;
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}
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struct perf_event_attr * __weak
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perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
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{
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return NULL;
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}
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static struct perf_pmu *pmu_lookup(const char *name)
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{
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struct perf_pmu *pmu;
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LIST_HEAD(format);
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LIST_HEAD(aliases);
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__u32 type;
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/*
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* The pmu data we store & need consists of the pmu
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* type value and format definitions. Load both right
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* now.
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*/
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if (pmu_format(name, &format))
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return NULL;
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if (pmu_aliases(name, &aliases))
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return NULL;
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if (pmu_type(name, &type))
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return NULL;
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pmu = zalloc(sizeof(*pmu));
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if (!pmu)
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return NULL;
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pmu->cpus = pmu_cpumask(name);
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INIT_LIST_HEAD(&pmu->format);
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INIT_LIST_HEAD(&pmu->aliases);
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list_splice(&format, &pmu->format);
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list_splice(&aliases, &pmu->aliases);
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pmu->name = strdup(name);
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pmu->type = type;
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list_add_tail(&pmu->list, &pmus);
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pmu->default_config = perf_pmu__get_default_config(pmu);
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return pmu;
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}
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static struct perf_pmu *pmu_find(const char *name)
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{
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struct perf_pmu *pmu;
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list_for_each_entry(pmu, &pmus, list)
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if (!strcmp(pmu->name, name))
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return pmu;
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return NULL;
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}
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struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu)
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{
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/*
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* pmu iterator: If pmu is NULL, we start at the begin,
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* otherwise return the next pmu. Returns NULL on end.
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*/
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if (!pmu) {
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pmu_read_sysfs();
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pmu = list_prepare_entry(pmu, &pmus, list);
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}
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list_for_each_entry_continue(pmu, &pmus, list)
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return pmu;
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return NULL;
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}
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struct perf_pmu *perf_pmu__find(const char *name)
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{
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struct perf_pmu *pmu;
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/*
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* Once PMU is loaded it stays in the list,
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* so we keep us from multiple reading/parsing
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* the pmu format definitions.
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*/
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pmu = pmu_find(name);
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if (pmu)
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return pmu;
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return pmu_lookup(name);
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}
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static struct perf_pmu_format *
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pmu_find_format(struct list_head *formats, const char *name)
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{
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struct perf_pmu_format *format;
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list_for_each_entry(format, formats, list)
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if (!strcmp(format->name, name))
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return format;
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return NULL;
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}
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__u64 perf_pmu__format_bits(struct list_head *formats, const char *name)
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{
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struct perf_pmu_format *format = pmu_find_format(formats, name);
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__u64 bits = 0;
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int fbit;
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if (!format)
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return 0;
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for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS)
|
|
bits |= 1ULL << fbit;
|
|
|
|
return bits;
|
|
}
|
|
|
|
/*
|
|
* Sets value based on the format definition (format parameter)
|
|
* and unformated value (value parameter).
|
|
*/
|
|
static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v,
|
|
bool zero)
|
|
{
|
|
unsigned long fbit, vbit;
|
|
|
|
for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) {
|
|
|
|
if (!test_bit(fbit, format))
|
|
continue;
|
|
|
|
if (value & (1llu << vbit++))
|
|
*v |= (1llu << fbit);
|
|
else if (zero)
|
|
*v &= ~(1llu << fbit);
|
|
}
|
|
}
|
|
|
|
static __u64 pmu_format_max_value(const unsigned long *format)
|
|
{
|
|
__u64 w = 0;
|
|
int fbit;
|
|
|
|
for_each_set_bit(fbit, format, PERF_PMU_FORMAT_BITS)
|
|
w |= (1ULL << fbit);
|
|
|
|
return w;
|
|
}
|
|
|
|
/*
|
|
* Term is a string term, and might be a param-term. Try to look up it's value
|
|
* in the remaining terms.
|
|
* - We have a term like "base-or-format-term=param-term",
|
|
* - We need to find the value supplied for "param-term" (with param-term named
|
|
* in a config string) later on in the term list.
|
|
*/
|
|
static int pmu_resolve_param_term(struct parse_events_term *term,
|
|
struct list_head *head_terms,
|
|
__u64 *value)
|
|
{
|
|
struct parse_events_term *t;
|
|
|
|
list_for_each_entry(t, head_terms, list) {
|
|
if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
|
|
if (!strcmp(t->config, term->config)) {
|
|
t->used = true;
|
|
*value = t->val.num;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (verbose)
|
|
printf("Required parameter '%s' not specified\n", term->config);
|
|
|
|
return -1;
|
|
}
|
|
|
|
static char *pmu_formats_string(struct list_head *formats)
|
|
{
|
|
struct perf_pmu_format *format;
|
|
char *str = NULL;
|
|
struct strbuf buf = STRBUF_INIT;
|
|
unsigned i = 0;
|
|
|
|
if (!formats)
|
|
return NULL;
|
|
|
|
/* sysfs exported terms */
|
|
list_for_each_entry(format, formats, list)
|
|
if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0)
|
|
goto error;
|
|
|
|
str = strbuf_detach(&buf, NULL);
|
|
error:
|
|
strbuf_release(&buf);
|
|
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* Setup one of config[12] attr members based on the
|
|
* user input data - term parameter.
|
|
*/
|
|
static int pmu_config_term(struct list_head *formats,
|
|
struct perf_event_attr *attr,
|
|
struct parse_events_term *term,
|
|
struct list_head *head_terms,
|
|
bool zero, struct parse_events_error *err)
|
|
{
|
|
struct perf_pmu_format *format;
|
|
__u64 *vp;
|
|
__u64 val, max_val;
|
|
|
|
/*
|
|
* If this is a parameter we've already used for parameterized-eval,
|
|
* skip it in normal eval.
|
|
*/
|
|
if (term->used)
|
|
return 0;
|
|
|
|
/*
|
|
* Hardcoded terms should be already in, so nothing
|
|
* to be done for them.
|
|
*/
|
|
if (parse_events__is_hardcoded_term(term))
|
|
return 0;
|
|
|
|
format = pmu_find_format(formats, term->config);
|
|
if (!format) {
|
|
if (verbose)
|
|
printf("Invalid event/parameter '%s'\n", term->config);
|
|
if (err) {
|
|
char *pmu_term = pmu_formats_string(formats);
|
|
|
|
err->idx = term->err_term;
|
|
err->str = strdup("unknown term");
|
|
err->help = parse_events_formats_error_string(pmu_term);
|
|
free(pmu_term);
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (format->value) {
|
|
case PERF_PMU_FORMAT_VALUE_CONFIG:
|
|
vp = &attr->config;
|
|
break;
|
|
case PERF_PMU_FORMAT_VALUE_CONFIG1:
|
|
vp = &attr->config1;
|
|
break;
|
|
case PERF_PMU_FORMAT_VALUE_CONFIG2:
|
|
vp = &attr->config2;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Either directly use a numeric term, or try to translate string terms
|
|
* using event parameters.
|
|
*/
|
|
if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
|
|
val = term->val.num;
|
|
else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
|
|
if (strcmp(term->val.str, "?")) {
|
|
if (verbose) {
|
|
pr_info("Invalid sysfs entry %s=%s\n",
|
|
term->config, term->val.str);
|
|
}
|
|
if (err) {
|
|
err->idx = term->err_val;
|
|
err->str = strdup("expected numeric value");
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (pmu_resolve_param_term(term, head_terms, &val))
|
|
return -EINVAL;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
max_val = pmu_format_max_value(format->bits);
|
|
if (val > max_val) {
|
|
if (err) {
|
|
err->idx = term->err_val;
|
|
if (asprintf(&err->str,
|
|
"value too big for format, maximum is %llu",
|
|
(unsigned long long)max_val) < 0)
|
|
err->str = strdup("value too big for format");
|
|
return -EINVAL;
|
|
}
|
|
/*
|
|
* Assume we don't care if !err, in which case the value will be
|
|
* silently truncated.
|
|
*/
|
|
}
|
|
|
|
pmu_format_value(format->bits, val, vp, zero);
|
|
return 0;
|
|
}
|
|
|
|
int perf_pmu__config_terms(struct list_head *formats,
|
|
struct perf_event_attr *attr,
|
|
struct list_head *head_terms,
|
|
bool zero, struct parse_events_error *err)
|
|
{
|
|
struct parse_events_term *term;
|
|
|
|
list_for_each_entry(term, head_terms, list) {
|
|
if (pmu_config_term(formats, attr, term, head_terms,
|
|
zero, err))
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Configures event's 'attr' parameter based on the:
|
|
* 1) users input - specified in terms parameter
|
|
* 2) pmu format definitions - specified by pmu parameter
|
|
*/
|
|
int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
|
|
struct list_head *head_terms,
|
|
struct parse_events_error *err)
|
|
{
|
|
bool zero = !!pmu->default_config;
|
|
|
|
attr->type = pmu->type;
|
|
return perf_pmu__config_terms(&pmu->format, attr, head_terms,
|
|
zero, err);
|
|
}
|
|
|
|
static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu,
|
|
struct parse_events_term *term)
|
|
{
|
|
struct perf_pmu_alias *alias;
|
|
char *name;
|
|
|
|
if (parse_events__is_hardcoded_term(term))
|
|
return NULL;
|
|
|
|
if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
|
|
if (term->val.num != 1)
|
|
return NULL;
|
|
if (pmu_find_format(&pmu->format, term->config))
|
|
return NULL;
|
|
name = term->config;
|
|
} else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
|
|
if (strcasecmp(term->config, "event"))
|
|
return NULL;
|
|
name = term->val.str;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
|
|
list_for_each_entry(alias, &pmu->aliases, list) {
|
|
if (!strcasecmp(alias->name, name))
|
|
return alias;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static int check_info_data(struct perf_pmu_alias *alias,
|
|
struct perf_pmu_info *info)
|
|
{
|
|
/*
|
|
* Only one term in event definition can
|
|
* define unit, scale and snapshot, fail
|
|
* if there's more than one.
|
|
*/
|
|
if ((info->unit && alias->unit) ||
|
|
(info->scale && alias->scale) ||
|
|
(info->snapshot && alias->snapshot))
|
|
return -EINVAL;
|
|
|
|
if (alias->unit)
|
|
info->unit = alias->unit;
|
|
|
|
if (alias->scale)
|
|
info->scale = alias->scale;
|
|
|
|
if (alias->snapshot)
|
|
info->snapshot = alias->snapshot;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Find alias in the terms list and replace it with the terms
|
|
* defined for the alias
|
|
*/
|
|
int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
|
|
struct perf_pmu_info *info)
|
|
{
|
|
struct parse_events_term *term, *h;
|
|
struct perf_pmu_alias *alias;
|
|
int ret;
|
|
|
|
info->per_pkg = false;
|
|
|
|
/*
|
|
* Mark unit and scale as not set
|
|
* (different from default values, see below)
|
|
*/
|
|
info->unit = NULL;
|
|
info->scale = 0.0;
|
|
info->snapshot = false;
|
|
|
|
list_for_each_entry_safe(term, h, head_terms, list) {
|
|
alias = pmu_find_alias(pmu, term);
|
|
if (!alias)
|
|
continue;
|
|
ret = pmu_alias_terms(alias, &term->list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = check_info_data(alias, info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (alias->per_pkg)
|
|
info->per_pkg = true;
|
|
|
|
list_del(&term->list);
|
|
free(term);
|
|
}
|
|
|
|
/*
|
|
* if no unit or scale foundin aliases, then
|
|
* set defaults as for evsel
|
|
* unit cannot left to NULL
|
|
*/
|
|
if (info->unit == NULL)
|
|
info->unit = "";
|
|
|
|
if (info->scale == 0.0)
|
|
info->scale = 1.0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_pmu__new_format(struct list_head *list, char *name,
|
|
int config, unsigned long *bits)
|
|
{
|
|
struct perf_pmu_format *format;
|
|
|
|
format = zalloc(sizeof(*format));
|
|
if (!format)
|
|
return -ENOMEM;
|
|
|
|
format->name = strdup(name);
|
|
format->value = config;
|
|
memcpy(format->bits, bits, sizeof(format->bits));
|
|
|
|
list_add_tail(&format->list, list);
|
|
return 0;
|
|
}
|
|
|
|
void perf_pmu__set_format(unsigned long *bits, long from, long to)
|
|
{
|
|
long b;
|
|
|
|
if (!to)
|
|
to = from;
|
|
|
|
memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS));
|
|
for (b = from; b <= to; b++)
|
|
set_bit(b, bits);
|
|
}
|
|
|
|
static int sub_non_neg(int a, int b)
|
|
{
|
|
if (b > a)
|
|
return 0;
|
|
return a - b;
|
|
}
|
|
|
|
static char *format_alias(char *buf, int len, struct perf_pmu *pmu,
|
|
struct perf_pmu_alias *alias)
|
|
{
|
|
struct parse_events_term *term;
|
|
int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name);
|
|
|
|
list_for_each_entry(term, &alias->terms, list) {
|
|
if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
|
|
used += snprintf(buf + used, sub_non_neg(len, used),
|
|
",%s=%s", term->config,
|
|
term->val.str);
|
|
}
|
|
|
|
if (sub_non_neg(len, used) > 0) {
|
|
buf[used] = '/';
|
|
used++;
|
|
}
|
|
if (sub_non_neg(len, used) > 0) {
|
|
buf[used] = '\0';
|
|
used++;
|
|
} else
|
|
buf[len - 1] = '\0';
|
|
|
|
return buf;
|
|
}
|
|
|
|
static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu,
|
|
struct perf_pmu_alias *alias)
|
|
{
|
|
snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name);
|
|
return buf;
|
|
}
|
|
|
|
static int cmp_string(const void *a, const void *b)
|
|
{
|
|
const char * const *as = a;
|
|
const char * const *bs = b;
|
|
return strcmp(*as, *bs);
|
|
}
|
|
|
|
void print_pmu_events(const char *event_glob, bool name_only)
|
|
{
|
|
struct perf_pmu *pmu;
|
|
struct perf_pmu_alias *alias;
|
|
char buf[1024];
|
|
int printed = 0;
|
|
int len, j;
|
|
char **aliases;
|
|
|
|
pmu = NULL;
|
|
len = 0;
|
|
while ((pmu = perf_pmu__scan(pmu)) != NULL) {
|
|
list_for_each_entry(alias, &pmu->aliases, list)
|
|
len++;
|
|
if (pmu->selectable)
|
|
len++;
|
|
}
|
|
aliases = zalloc(sizeof(char *) * len);
|
|
if (!aliases)
|
|
goto out_enomem;
|
|
pmu = NULL;
|
|
j = 0;
|
|
while ((pmu = perf_pmu__scan(pmu)) != NULL) {
|
|
list_for_each_entry(alias, &pmu->aliases, list) {
|
|
char *name = format_alias(buf, sizeof(buf), pmu, alias);
|
|
bool is_cpu = !strcmp(pmu->name, "cpu");
|
|
|
|
if (event_glob != NULL &&
|
|
!(strglobmatch(name, event_glob) ||
|
|
(!is_cpu && strglobmatch(alias->name,
|
|
event_glob))))
|
|
continue;
|
|
|
|
if (is_cpu && !name_only)
|
|
name = format_alias_or(buf, sizeof(buf), pmu, alias);
|
|
|
|
aliases[j] = strdup(name);
|
|
if (aliases[j] == NULL)
|
|
goto out_enomem;
|
|
j++;
|
|
}
|
|
if (pmu->selectable &&
|
|
(event_glob == NULL || strglobmatch(pmu->name, event_glob))) {
|
|
char *s;
|
|
if (asprintf(&s, "%s//", pmu->name) < 0)
|
|
goto out_enomem;
|
|
aliases[j] = s;
|
|
j++;
|
|
}
|
|
}
|
|
len = j;
|
|
qsort(aliases, len, sizeof(char *), cmp_string);
|
|
for (j = 0; j < len; j++) {
|
|
if (name_only) {
|
|
printf("%s ", aliases[j]);
|
|
continue;
|
|
}
|
|
printf(" %-50s [Kernel PMU event]\n", aliases[j]);
|
|
printed++;
|
|
}
|
|
if (printed && pager_in_use())
|
|
printf("\n");
|
|
out_free:
|
|
for (j = 0; j < len; j++)
|
|
zfree(&aliases[j]);
|
|
zfree(&aliases);
|
|
return;
|
|
|
|
out_enomem:
|
|
printf("FATAL: not enough memory to print PMU events\n");
|
|
if (aliases)
|
|
goto out_free;
|
|
}
|
|
|
|
bool pmu_have_event(const char *pname, const char *name)
|
|
{
|
|
struct perf_pmu *pmu;
|
|
struct perf_pmu_alias *alias;
|
|
|
|
pmu = NULL;
|
|
while ((pmu = perf_pmu__scan(pmu)) != NULL) {
|
|
if (strcmp(pname, pmu->name))
|
|
continue;
|
|
list_for_each_entry(alias, &pmu->aliases, list)
|
|
if (!strcmp(alias->name, name))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
|
|
{
|
|
struct stat st;
|
|
char path[PATH_MAX];
|
|
const char *sysfs;
|
|
|
|
sysfs = sysfs__mountpoint();
|
|
if (!sysfs)
|
|
return NULL;
|
|
|
|
snprintf(path, PATH_MAX,
|
|
"%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name);
|
|
|
|
if (stat(path, &st) < 0)
|
|
return NULL;
|
|
|
|
return fopen(path, "r");
|
|
}
|
|
|
|
int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
|
|
...)
|
|
{
|
|
va_list args;
|
|
FILE *file;
|
|
int ret = EOF;
|
|
|
|
va_start(args, fmt);
|
|
file = perf_pmu__open_file(pmu, name);
|
|
if (file) {
|
|
ret = vfscanf(file, fmt, args);
|
|
fclose(file);
|
|
}
|
|
va_end(args);
|
|
return ret;
|
|
}
|