parse-branch-options.c

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// SPDX-License-Identifier: GPL-2.0
#include "perf.h"
#include "util/util.h"
#include "util/debug.h"
#include <subcmd/parse-options.h>
#include "util/parse-branch-options.h"

#define BRANCH_OPT(n, m) \
    { .name = n, .mode = (m) }

#define BRANCH_END { .name = NULL }

struct branch_mode {
    const char *name;
    int mode;
};

static const struct branch_mode branch_modes[] = {
    BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
    BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
    BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
    BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
    BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
    BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
    BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
    BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX),
    BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX),
    BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
    BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
    BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
    BRANCH_OPT("call", PERF_SAMPLE_BRANCH_CALL),
    BRANCH_OPT("save_type", PERF_SAMPLE_BRANCH_TYPE_SAVE),
    BRANCH_END
};

int parse_branch_str(const char *str, __u64 *mode)
{
#define ONLY_PLM \
    (PERF_SAMPLE_BRANCH_USER    |\
     PERF_SAMPLE_BRANCH_KERNEL  |\
     PERF_SAMPLE_BRANCH_HV)

    int ret = 0;
    char *p, *s;
    char *os = NULL;
    const struct branch_mode *br;

    if (str == NULL) {
        *mode = PERF_SAMPLE_BRANCH_ANY;
        return 0;
    }

    /* because str is read-only */
    s = os = strdup(str);
    if (!s)
        return -1;

    for (;;) {
        p = strchr(s, ',');
        if (p)
            *p = '\0';

        for (br = branch_modes; br->name; br++) {
            if (!strcasecmp(s, br->name))
                break;
        }
        if (!br->name) {
            ret = -1;
            pr_warning("unknown branch filter %s,"
                    " check man page\n", s);
            goto error;
        }

        *mode |= br->mode;

        if (!p)
            break;

        s = p + 1;
    }

    /* default to any branch */
    if ((*mode & ~ONLY_PLM) == 0) {
        *mode = PERF_SAMPLE_BRANCH_ANY;
    }
error:
    free(os);
    return ret;
}

int
parse_branch_stack(const struct option *opt, const char *str, int unset)
{
    __u64 *mode = (__u64 *)opt->value;

    if (unset)
        return 0;

    /*
     * cannot set it twice, -b + --branch-filter for instance
     */
    if (*mode)
        return -1;

    return parse_branch_str(str, mode);
}