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Date: Fri, 1 Mar 2024 12:13:05 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] perf: Suggest inbuilt commands for unknown command
The existing unknown command code looks for perf scripts like
perf-archive.sh and perf-iostat.sh, however, inbuilt commands aren't
suggested. Add the inbuilt commands so they may be suggested too.
Before:
```
$ perf reccord
perf: 'reccord' is not a perf-command. See 'perf --help'.
```
After:
```
$ perf reccord
perf: 'reccord' is not a perf-command. See 'perf --help'.
Did you mean this?
record
```
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
v2. Drops a merged patch and rebases. No functional change. Arnaldo
reported the patch not working for him, but I've not found a
reproduction and it works for me:
https://lore.kernel.org/lkml/ZZcdDyyADG8dP8LM@kernel.org/
---
tools/perf/builtin.h | 4 ++-
tools/perf/perf.c | 21 +++++++++++---
tools/perf/util/help-unknown-cmd.c | 45 ++++++++++++++----------------
3 files changed, 41 insertions(+), 29 deletions(-)
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
index f2ab5bae2150..f4375deabfa3 100644
--- a/tools/perf/builtin.h
+++ b/tools/perf/builtin.h
@@ -2,8 +2,10 @@
#ifndef BUILTIN_H
#define BUILTIN_H
+struct cmdnames;
+
void list_common_cmds_help(void);
-const char *help_unknown_cmd(const char *cmd);
+const char *help_unknown_cmd(const char *cmd, struct cmdnames *main_cmds);
int cmd_annotate(int argc, const char **argv);
int cmd_bench(int argc, const char **argv);
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 921bee0a6437..c719e6ccd9e2 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -18,6 +18,7 @@
#include <subcmd/run-command.h>
#include "util/parse-events.h"
#include <subcmd/parse-options.h>
+#include <subcmd/help.h>
#include "util/debug.h"
#include "util/event.h"
#include "util/util.h" // usage()
@@ -557,7 +558,7 @@ int main(int argc, const char **argv)
pthread__block_sigwinch();
while (1) {
- static int done_help;
+ int done_help;
run_argv(&argc, &argv);
@@ -565,14 +566,26 @@ int main(int argc, const char **argv)
break;
if (!done_help) {
- cmd = argv[0] = help_unknown_cmd(cmd);
+ struct cmdnames main_cmds;
+
+ for (unsigned int i = 0; i < ARRAY_SIZE(commands); i++) {
+ add_cmdname(&main_cmds,
+ commands[i].cmd,
+ strlen(commands[i].cmd));
+ }
+ cmd = argv[0] = help_unknown_cmd(cmd, &main_cmds);
+ clean_cmdnames(&main_cmds);
done_help = 1;
+ if (!cmd)
+ break;
} else
break;
}
- fprintf(stderr, "Failed to run command '%s': %s\n",
- cmd, str_error_r(errno, sbuf, sizeof(sbuf)));
+ if (cmd) {
+ fprintf(stderr, "Failed to run command '%s': %s\n",
+ cmd, str_error_r(errno, sbuf, sizeof(sbuf)));
+ }
out:
if (debug_fp)
fclose(debug_fp);
diff --git a/tools/perf/util/help-unknown-cmd.c b/tools/perf/util/help-unknown-cmd.c
index eab99ea6ac01..2ba3369f1620 100644
--- a/tools/perf/util/help-unknown-cmd.c
+++ b/tools/perf/util/help-unknown-cmd.c
@@ -52,46 +52,44 @@ static int add_cmd_list(struct cmdnames *cmds, struct cmdnames *old)
return 0;
}
-const char *help_unknown_cmd(const char *cmd)
+const char *help_unknown_cmd(const char *cmd, struct cmdnames *main_cmds)
{
unsigned int i, n = 0, best_similarity = 0;
- struct cmdnames main_cmds, other_cmds;
+ struct cmdnames other_cmds;
- memset(&main_cmds, 0, sizeof(main_cmds));
- memset(&other_cmds, 0, sizeof(main_cmds));
+ memset(&other_cmds, 0, sizeof(other_cmds));
perf_config(perf_unknown_cmd_config, NULL);
- load_command_list("perf-", &main_cmds, &other_cmds);
+ load_command_list("perf-", main_cmds, &other_cmds);
- if (add_cmd_list(&main_cmds, &other_cmds) < 0) {
+ 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);
+ qsort(main_cmds->names, main_cmds->cnt,
+ sizeof(main_cmds->names), cmdname_compare);
+ uniq(main_cmds);
- if (main_cmds.cnt) {
+ 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);
+ 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);
+ qsort(main_cmds->names, main_cmds->cnt,
+ sizeof(*main_cmds->names), levenshtein_compare);
- best_similarity = main_cmds.names[0]->len;
+ best_similarity = main_cmds->names[0]->len;
n = 1;
- while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len)
+ 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;
+ const char *assumed = main_cmds->names[0]->name;
- main_cmds.names[0] = NULL;
- clean_cmdnames(&main_cmds);
+ main_cmds->names[0] = NULL;
clean_cmdnames(&other_cmds);
fprintf(stderr, "WARNING: You called a perf program named '%s', "
"which does not exist.\n"
@@ -107,15 +105,14 @@ const char *help_unknown_cmd(const char *cmd)
fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd);
- if (main_cmds.cnt && best_similarity < 6) {
+ 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);
+ fprintf(stderr, "\t%s\n", main_cmds->names[i]->name);
}
end:
- clean_cmdnames(&main_cmds);
clean_cmdnames(&other_cmds);
- exit(1);
+ return NULL;
}
--
2.44.0.278.ge034bb2e1d-goog
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