Quelle  parse-branch-options.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
#include "util/debug.h"
#include "util/event.h"
#include <subcmd/parse-options.h>
#include "util/parse-branch-options.h"
#include <stdlib.h>
#include <string.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("no_flags", PERF_SAMPLE_BRANCH_NO_FLAGS),
 BRANCH_OPT("no_cycles", PERF_SAMPLE_BRANCH_NO_CYCLES),
 BRANCH_OPT("save_type", PERF_SAMPLE_BRANCH_TYPE_SAVE),
 BRANCH_OPT("stack", PERF_SAMPLE_BRANCH_CALL_STACK),
 BRANCH_OPT("hw_index", PERF_SAMPLE_BRANCH_HW_INDEX),
 BRANCH_OPT("priv", PERF_SAMPLE_BRANCH_PRIV_SAVE),
 BRANCH_OPT("counter", PERF_SAMPLE_BRANCH_COUNTERS),
 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) {
  pr_err("Error: Can't use --branch-any (-b) with --branch-filter (-j).\n");
  return -1;
 }

 return parse_branch_str(str, mode);
}