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-rw-r--r--tools/perf/builtin-probe.c147
1 files changed, 131 insertions, 16 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index b81cec33b4b2..132afc97676c 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -37,10 +37,10 @@
#include "util/strfilter.h"
#include "util/symbol.h"
#include "util/debug.h"
-#include <api/fs/debugfs.h>
#include "util/parse-options.h"
#include "util/probe-finder.h"
#include "util/probe-event.h"
+#include "util/probe-file.h"
#define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
#define DEFAULT_FUNC_FILTER "!_*"
@@ -182,10 +182,8 @@ static int opt_set_target(const struct option *opt, const char *str,
if (str) {
if (!strcmp(opt->long_name, "exec"))
params.uprobes = true;
-#ifdef HAVE_DWARF_SUPPORT
else if (!strcmp(opt->long_name, "module"))
params.uprobes = false;
-#endif
else
return ret;
@@ -311,6 +309,119 @@ static void pr_err_with_code(const char *msg, int err)
pr_err("\n");
}
+static int perf_add_probe_events(struct perf_probe_event *pevs, int npevs)
+{
+ int ret;
+ int i, k;
+ const char *event = NULL, *group = NULL;
+
+ ret = init_probe_symbol_maps(pevs->uprobes);
+ if (ret < 0)
+ return ret;
+
+ ret = convert_perf_probe_events(pevs, npevs);
+ if (ret < 0)
+ goto out_cleanup;
+
+ ret = apply_perf_probe_events(pevs, npevs);
+ if (ret < 0)
+ goto out_cleanup;
+
+ for (i = k = 0; i < npevs; i++)
+ k += pevs[i].ntevs;
+
+ pr_info("Added new event%s\n", (k > 1) ? "s:" : ":");
+ for (i = 0; i < npevs; i++) {
+ struct perf_probe_event *pev = &pevs[i];
+
+ for (k = 0; k < pev->ntevs; k++) {
+ struct probe_trace_event *tev = &pev->tevs[k];
+
+ /* We use tev's name for showing new events */
+ show_perf_probe_event(tev->group, tev->event, pev,
+ tev->point.module, false);
+
+ /* Save the last valid name */
+ event = tev->event;
+ group = tev->group;
+ }
+ }
+
+ /* Note that it is possible to skip all events because of blacklist */
+ if (event) {
+ /* Show how to use the event. */
+ pr_info("\nYou can now use it in all perf tools, such as:\n\n");
+ pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", group, event);
+ }
+
+out_cleanup:
+ cleanup_perf_probe_events(pevs, npevs);
+ exit_probe_symbol_maps();
+ return ret;
+}
+
+static int perf_del_probe_events(struct strfilter *filter)
+{
+ int ret, ret2, ufd = -1, kfd = -1;
+ char *str = strfilter__string(filter);
+ struct strlist *klist = NULL, *ulist = NULL;
+ struct str_node *ent;
+
+ if (!str)
+ return -EINVAL;
+
+ pr_debug("Delete filter: \'%s\'\n", str);
+
+ /* Get current event names */
+ ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW);
+ if (ret < 0)
+ goto out;
+
+ klist = strlist__new(NULL, NULL);
+ ulist = strlist__new(NULL, NULL);
+ if (!klist || !ulist) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = probe_file__get_events(kfd, filter, klist);
+ if (ret == 0) {
+ strlist__for_each(ent, klist)
+ pr_info("Removed event: %s\n", ent->s);
+
+ ret = probe_file__del_strlist(kfd, klist);
+ if (ret < 0)
+ goto error;
+ }
+
+ ret2 = probe_file__get_events(ufd, filter, ulist);
+ if (ret2 == 0) {
+ strlist__for_each(ent, ulist)
+ pr_info("Removed event: %s\n", ent->s);
+
+ ret2 = probe_file__del_strlist(ufd, ulist);
+ if (ret2 < 0)
+ goto error;
+ }
+
+ if (ret == -ENOENT && ret2 == -ENOENT)
+ pr_debug("\"%s\" does not hit any event.\n", str);
+ /* Note that this is silently ignored */
+ ret = 0;
+
+error:
+ if (kfd >= 0)
+ close(kfd);
+ if (ufd >= 0)
+ close(ufd);
+out:
+ strlist__delete(klist);
+ strlist__delete(ulist);
+ free(str);
+
+ return ret;
+}
+
static int
__cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
{
@@ -377,9 +488,6 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
"file", "vmlinux pathname"),
OPT_STRING('s', "source", &symbol_conf.source_prefix,
"directory", "path to kernel source"),
- OPT_CALLBACK('m', "module", NULL, "modname|path",
- "target module name (for online) or path (for offline)",
- opt_set_target),
OPT_BOOLEAN('\0', "no-inlines", &probe_conf.no_inlines,
"Don't search inlined functions"),
#endif
@@ -396,6 +504,9 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
opt_set_filter),
OPT_CALLBACK('x', "exec", NULL, "executable|path",
"target executable name or path", opt_set_target),
+ OPT_CALLBACK('m', "module", NULL, "modname|path",
+ "target module name (for online) or path (for offline)",
+ opt_set_target),
OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
"Enable symbol demangling"),
OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
@@ -417,12 +528,12 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
PARSE_OPT_STOP_AT_NON_OPTION);
if (argc > 0) {
if (strcmp(argv[0], "-") == 0) {
- pr_warning(" Error: '-' is not supported.\n");
- usage_with_options(probe_usage, options);
+ usage_with_options_msg(probe_usage, options,
+ "'-' is not supported.\n");
}
if (params.command && params.command != 'a') {
- pr_warning(" Error: another command except --add is set.\n");
- usage_with_options(probe_usage, options);
+ usage_with_options_msg(probe_usage, options,
+ "another command except --add is set.\n");
}
ret = parse_probe_event_argv(argc, argv);
if (ret < 0) {
@@ -451,8 +562,10 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
switch (params.command) {
case 'l':
if (params.uprobes) {
- pr_warning(" Error: Don't use --list with --exec.\n");
- usage_with_options(probe_usage, options);
+ pr_err(" Error: Don't use --list with --exec.\n");
+ parse_options_usage(probe_usage, options, "l", true);
+ parse_options_usage(NULL, options, "x", true);
+ return -EINVAL;
}
ret = show_perf_probe_events(params.filter);
if (ret < 0)
@@ -483,7 +596,7 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
return ret;
#endif
case 'd':
- ret = del_perf_probe_events(params.filter);
+ ret = perf_del_probe_events(params.filter);
if (ret < 0) {
pr_err_with_code(" Error: Failed to delete events.", ret);
return ret;
@@ -492,11 +605,13 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
case 'a':
/* Ensure the last given target is used */
if (params.target && !params.target_used) {
- pr_warning(" Error: -x/-m must follow the probe definitions.\n");
- usage_with_options(probe_usage, options);
+ pr_err(" Error: -x/-m must follow the probe definitions.\n");
+ parse_options_usage(probe_usage, options, "m", true);
+ parse_options_usage(NULL, options, "x", true);
+ return -EINVAL;
}
- ret = add_perf_probe_events(params.events, params.nevents);
+ ret = perf_add_probe_events(params.events, params.nevents);
if (ret < 0) {
pr_err_with_code(" Error: Failed to add events.", ret);
return ret;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.