LXR linux/tools/perf/util/parse-branch-options.c

   1#include "perf.h"
   2#include "util/util.h"
   3#include "util/debug.h"
   4#include <subcmd/parse-options.h>
   5#include "util/parse-branch-options.h"
   6
   7#define BRANCH_OPT(n, m) \
   8        { .name = n, .mode = (m) }
   9
  10#define BRANCH_END { .name = NULL }
  11
  12struct branch_mode {
  13        const char *name;
  14        int mode;
  15};
  16
  17static const struct branch_mode branch_modes[] = {
  18        BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
  19        BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
  20        BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
  21        BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
  22        BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
  23        BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
  24        BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
  25        BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX),
  26        BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX),
  27        BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
  28        BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
  29        BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
  30        BRANCH_OPT("call", PERF_SAMPLE_BRANCH_CALL),
  31        BRANCH_END
  32};
  33
  34int
  35parse_branch_stack(const struct option *opt, const char *str, int unset)
  36{
  37#define ONLY_PLM \
  38        (PERF_SAMPLE_BRANCH_USER        |\
  39         PERF_SAMPLE_BRANCH_KERNEL      |\
  40         PERF_SAMPLE_BRANCH_HV)
  41
  42        uint64_t *mode = (uint64_t *)opt->value;
  43        const struct branch_mode *br;
  44        char *s, *os = NULL, *p;
  45        int ret = -1;
  46
  47        if (unset)
  48                return 0;
  49
  50        /*
  51         * cannot set it twice, -b + --branch-filter for instance
  52         */
  53        if (*mode)
  54                return -1;
  55
  56        /* str may be NULL in case no arg is passed to -b */
  57        if (str) {
  58                /* because str is read-only */
  59                s = os = strdup(str);
  60                if (!s)
  61                        return -1;
  62
  63                for (;;) {
  64                        p = strchr(s, ',');
  65                        if (p)
  66                                *p = '\0';
  67
  68                        for (br = branch_modes; br->name; br++) {
  69                                if (!strcasecmp(s, br->name))
  70                                        break;
  71                        }
  72                        if (!br->name) {
  73                                ui__warning("unknown branch filter %s,"
  74                                            " check man page\n", s);
  75                                goto error;
  76                        }
  77
  78                        *mode |= br->mode;
  79
  80                        if (!p)
  81                                break;
  82
  83                        s = p + 1;
  84                }
  85        }
  86        ret = 0;
  87
  88        /* default to any branch */
  89        if ((*mode & ~ONLY_PLM) == 0) {
  90                *mode = PERF_SAMPLE_BRANCH_ANY;
  91        }
  92error:
  93        free(os);
  94        return ret;
  95}
  96