mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
0f0d1354a5
Avoid potential memory leaks. Committer notes: This is right before calling exit(1), so just to clean up memory leak checker detection. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: André Almeida <andrealmeid@igalia.com> Cc: Darren Hart <dvhart@infradead.org> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20230611233610.953456-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include "cache.h"
|
|
#include "config.h"
|
|
#include <poll.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <subcmd/help.h>
|
|
#include "../builtin.h"
|
|
#include "levenshtein.h"
|
|
#include <linux/zalloc.h>
|
|
|
|
static int autocorrect;
|
|
|
|
static int perf_unknown_cmd_config(const char *var, const char *value,
|
|
void *cb __maybe_unused)
|
|
{
|
|
if (!strcmp(var, "help.autocorrect"))
|
|
return perf_config_int(&autocorrect, var,value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int levenshtein_compare(const void *p1, const void *p2)
|
|
{
|
|
const struct cmdname *const *c1 = p1, *const *c2 = p2;
|
|
const char *s1 = (*c1)->name, *s2 = (*c2)->name;
|
|
int l1 = (*c1)->len;
|
|
int l2 = (*c2)->len;
|
|
return l1 != l2 ? l1 - l2 : strcmp(s1, s2);
|
|
}
|
|
|
|
static int add_cmd_list(struct cmdnames *cmds, struct cmdnames *old)
|
|
{
|
|
unsigned int i, nr = cmds->cnt + old->cnt;
|
|
void *tmp;
|
|
|
|
if (nr > cmds->alloc) {
|
|
/* Choose bigger one to alloc */
|
|
if (alloc_nr(cmds->alloc) < nr)
|
|
cmds->alloc = nr;
|
|
else
|
|
cmds->alloc = alloc_nr(cmds->alloc);
|
|
tmp = realloc(cmds->names, cmds->alloc * sizeof(*cmds->names));
|
|
if (!tmp)
|
|
return -1;
|
|
cmds->names = tmp;
|
|
}
|
|
for (i = 0; i < old->cnt; i++)
|
|
cmds->names[cmds->cnt++] = old->names[i];
|
|
zfree(&old->names);
|
|
old->cnt = 0;
|
|
return 0;
|
|
}
|
|
|
|
const char *help_unknown_cmd(const char *cmd)
|
|
{
|
|
unsigned int i, n = 0, best_similarity = 0;
|
|
struct cmdnames main_cmds, other_cmds;
|
|
|
|
memset(&main_cmds, 0, sizeof(main_cmds));
|
|
memset(&other_cmds, 0, sizeof(main_cmds));
|
|
|
|
perf_config(perf_unknown_cmd_config, NULL);
|
|
|
|
load_command_list("perf-", &main_cmds, &other_cmds);
|
|
|
|
if (add_cmd_list(&main_cmds, &other_cmds) < 0) {
|
|
fprintf(stderr, "ERROR: Failed to allocate command list for unknown command.\n");
|
|
goto end;
|
|
}
|
|
qsort(main_cmds.names, main_cmds.cnt,
|
|
sizeof(main_cmds.names), cmdname_compare);
|
|
uniq(&main_cmds);
|
|
|
|
if (main_cmds.cnt) {
|
|
/* This reuses cmdname->len for similarity index */
|
|
for (i = 0; i < main_cmds.cnt; ++i)
|
|
main_cmds.names[i]->len =
|
|
levenshtein(cmd, main_cmds.names[i]->name, 0, 2, 1, 4);
|
|
|
|
qsort(main_cmds.names, main_cmds.cnt,
|
|
sizeof(*main_cmds.names), levenshtein_compare);
|
|
|
|
best_similarity = main_cmds.names[0]->len;
|
|
n = 1;
|
|
while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len)
|
|
++n;
|
|
}
|
|
|
|
if (autocorrect && n == 1) {
|
|
const char *assumed = main_cmds.names[0]->name;
|
|
|
|
main_cmds.names[0] = NULL;
|
|
clean_cmdnames(&main_cmds);
|
|
clean_cmdnames(&other_cmds);
|
|
fprintf(stderr, "WARNING: You called a perf program named '%s', "
|
|
"which does not exist.\n"
|
|
"Continuing under the assumption that you meant '%s'\n",
|
|
cmd, assumed);
|
|
if (autocorrect > 0) {
|
|
fprintf(stderr, "in %0.1f seconds automatically...\n",
|
|
(float)autocorrect/10.0);
|
|
poll(NULL, 0, autocorrect * 100);
|
|
}
|
|
return assumed;
|
|
}
|
|
|
|
fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd);
|
|
|
|
if (main_cmds.cnt && best_similarity < 6) {
|
|
fprintf(stderr, "\nDid you mean %s?\n",
|
|
n < 2 ? "this": "one of these");
|
|
|
|
for (i = 0; i < n; i++)
|
|
fprintf(stderr, "\t%s\n", main_cmds.names[i]->name);
|
|
}
|
|
end:
|
|
clean_cmdnames(&main_cmds);
|
|
clean_cmdnames(&other_cmds);
|
|
exit(1);
|
|
}
|