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

   1// SPDX-License-Identifier: GPL-2.0
   2#include "perf.h"
   3#include "util/util.h"
   4#include "util/debug.h"
   5#include <subcmd/parse-options.h>
   6#include "util/parse-branch-options.h"
   7
   8#define BRANCH_OPT(n, m) \
   9        { .name = n, .mode = (m) }
  10
  11#define BRANCH_END { .name = NULL }
  12
  13struct branch_mode {
  14        const char *name;
  15        int mode;
  16};
  17
  18static const struct branch_mode branch_modes[] = {
  19        BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
  20        BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
  21        BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
  22        BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
  23        BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
  24        BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
  25        BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
  26        BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX),
  27        BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX),
  28        BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
  29        BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
  30        BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
  31        BRANCH_OPT("call", PERF_SAMPLE_BRANCH_CALL),
  32        BRANCH_OPT("save_type", PERF_SAMPLE_BRANCH_TYPE_SAVE),
  33        BRANCH_END
  34};
  35
  36int parse_branch_str(const char *str, __u64 *mode)
  37{
  38#define ONLY_PLM \
  39        (PERF_SAMPLE_BRANCH_USER        |\
  40         PERF_SAMPLE_BRANCH_KERNEL      |\
  41         PERF_SAMPLE_BRANCH_HV)
  42
  43        int ret = 0;
  44        char *p, *s;
  45        char *os = NULL;
  46        const struct branch_mode *br;
  47
  48        if (str == NULL) {
  49                *mode = PERF_SAMPLE_BRANCH_ANY;
  50                return 0;
  51        }
  52
  53        /* because str is read-only */
  54        s = os = strdup(str);
  55        if (!s)
  56                return -1;
  57
  58        for (;;) {
  59                p = strchr(s, ',');
  60                if (p)
  61                        *p = '\0';
  62
  63                for (br = branch_modes; br->name; br++) {
  64                        if (!strcasecmp(s, br->name))
  65                                break;
  66                }
  67                if (!br->name) {
  68                        ret = -1;
  69                        pr_warning("unknown branch filter %s,"
  70                                    " check man page\n", s);
  71                        goto error;
  72                }
  73
  74                *mode |= br->mode;
  75
  76                if (!p)
  77                        break;
  78
  79                s = p + 1;
  80        }
  81
  82        /* default to any branch */
  83        if ((*mode & ~ONLY_PLM) == 0) {
  84                *mode = PERF_SAMPLE_BRANCH_ANY;
  85        }
  86error:
  87        free(os);
  88        return ret;
  89}
  90
  91int
  92parse_branch_stack(const struct option *opt, const char *str, int unset)
  93{
  94        __u64 *mode = (__u64 *)opt->value;
  95
  96        if (unset)
  97                return 0;
  98
  99        /*
 100         * cannot set it twice, -b + --branch-filter for instance
 101         */
 102        if (*mode)
 103                return -1;
 104
 105        return parse_branch_str(str, mode);
 106}
 107