1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * builtin-probe.c
21 #include "util/build-id.h"
26 #include <subcmd/parse-options.h>
27 #include "util/probe-finder.h"
28 #include "util/probe-event.h"
29 #include "util/probe-file.h"
58 	pr_debug("probe-definition(%d): %s\n", params.nevents, str);  in parse_probe_event()
61 		return -1;  in parse_probe_event()
64 	pev->uprobes = params.uprobes;  in parse_probe_event()
66 		pev->target = strdup(params.target);  in parse_probe_event()
67 		if (!pev->target)  in parse_probe_event()
68 			return -ENOMEM;  in parse_probe_event()
72 	pev->nsi = nsinfo__get(params.nsi);  in parse_probe_event()
74 	/* Parse a perf-probe command into event */  in parse_probe_event()
76 	pr_debug("%d arguments\n", pev->nargs);  in parse_probe_event()
90 			ret = err ? -EINVAL : -ENOMEM;  in params_add_filter()
94 	if (ret == -EINVAL) {  in params_add_filter()
95 		pr_err("Filter parse error at %td.\n", err - str + 1);  in params_add_filter()
97 		pr_err("         %*c\n", (int)(err - str + 1), '^');  in params_add_filter()
118 			return -ENOMEM;  in set_target()
122 		buf = ptr + (strlen(ptr) - 3);  in set_target()
154 		return -ENOMEM;  in parse_probe_event_argv()
170 	int ret = -ENOENT;  in opt_set_target()
174 		if (!strcmp(opt->long_name, "exec"))  in opt_set_target()
176 		else if (!strcmp(opt->long_name, "module"))  in opt_set_target()
191 				return -ENOMEM;  in opt_set_target()
205 	int ret = -ENOENT;  in opt_set_target_ns()
213 			ret = -errno;  in opt_set_target_ns()
219 		if (nsip && nsip->need_setns)  in opt_set_target_ns()
242 		pr_warning("Warning: more than one --line options are"  in opt_show_lines()
247 	params.command = opt->short_name;  in opt_show_lines()
263 	if (!ret && pev->nargs != 0) {  in opt_show_vars()
264 		pr_err("  Error: '--vars' doesn't accept arguments.\n");  in opt_show_vars()
265 		return -EINVAL;  in opt_show_vars()
267 	params.command = opt->short_name;  in opt_show_vars()
279 		params.command = opt->short_name;  in opt_add_probe_event()
290 		params.command = opt->short_name;  in opt_set_filter_with_command()
331 		 str_error_r(-err, sbuf, sizeof(sbuf)), err);  in pr_err_with_code()
341 	ret = init_probe_symbol_maps(pevs->uprobes);  in perf_add_probe_events()
365 		for (k = 0; k < pev->ntevs; k++) {  in perf_add_probe_events()
366 			struct probe_trace_event *tev = &pev->tevs[k];  in perf_add_probe_events()
368 			if (!tev->event)  in perf_add_probe_events()
372 			show_perf_probe_event(tev->group, tev->event, pev,  in perf_add_probe_events()
373 					      tev->point.module, false);  in perf_add_probe_events()
376 			event = tev->event;  in perf_add_probe_events()
377 			group = tev->group;  in perf_add_probe_events()
385 		pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", group, event);  in perf_add_probe_events()
403 		ret = -errno;  in del_perf_probe_caches()
405 		return ret ?: -ENOMEM;  in del_perf_probe_caches()
409 		cache = probe_cache__new(nd->s, NULL);  in del_perf_probe_caches()
414 			pr_warning("Failed to remove entries for %s\n", nd->s);  in del_perf_probe_caches()
422 	int ret, ret2, ufd = -1, kfd = -1;  in perf_del_probe_events()
428 		return -EINVAL;  in perf_del_probe_events()
443 		ret = -ENOMEM;  in perf_del_probe_events()
450 			pr_info("Removed event: %s\n", ent->s);  in perf_del_probe_events()
455 	} else if (ret == -ENOMEM)  in perf_del_probe_events()
461 			pr_info("Removed event: %s\n", ent->s);  in perf_del_probe_events()
466 	} else if (ret2 == -ENOMEM)  in perf_del_probe_events()
469 	if (ret == -ENOENT && ret2 == -ENOENT)  in perf_del_probe_events()
500 		"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",  in __cmd_probe()
501 		"perf probe [<options>] --del '[GROUP:]EVENT' ...",  in __cmd_probe()
502 		"perf probe --list [GROUP:]EVENT ...",  in __cmd_probe()
504 		"perf probe [<options>] --line 'LINEDESC'",  in __cmd_probe()
505 		"perf probe [<options>] --vars 'PROBEPOINT'",  in __cmd_probe()
507 		"perf probe [<options>] --funcs",  in __cmd_probe()
530 		"\t\tAL:\tAbsolute line number in file.\n"  in __cmd_probe()
533 		"\t\t\tkprobe-tracer argument format.)\n",  in __cmd_probe()
535 		"\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n",  in __cmd_probe()
544 		     "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]",  in __cmd_probe()
550 		    "Show external variables too (with --vars only)"),  in __cmd_probe()
552 		"Show variables location range in scope (with --vars only)"),  in __cmd_probe()
557 	OPT_BOOLEAN('\0', "no-inlines", &probe_conf.no_inlines,  in __cmd_probe()
560 	OPT_INTEGER('\0', "max-probes", &probe_conf.max_probes,  in __cmd_probe()
563 			     "Show potential probe-able functions.",  in __cmd_probe()
566 		     "[!]FILTER", "Set a filter (with --vars/funcs only)\n"  in __cmd_probe()
567 		     "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"  in __cmd_probe()
568 		     "\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)",  in __cmd_probe()
570 	OPT_CALLBACK('x', "exec", NULL, "executable|path",  in __cmd_probe()
577 	OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,  in __cmd_probe()
582 	OPT_CALLBACK(0, "target-ns", NULL, "pid",  in __cmd_probe()
603 	set_nobuild('\0', "no-inlines", true);  in __cmd_probe()
611 		if (strcmp(argv[0], "-") == 0) {  in __cmd_probe()
613 				"'-' is not supported.\n");  in __cmd_probe()
617 				"another command except --add is set.\n");  in __cmd_probe()
629 			pr_err("  Error: -v and -q are exclusive.\n");  in __cmd_probe()
630 			return -EINVAL;  in __cmd_probe()
632 		verbose = -1;  in __cmd_probe()
644 	 * Except for --list, --del and --add, other command doesn't depend  in __cmd_probe()
654 			pr_err("  Error: Don't use --list with --exec.\n");  in __cmd_probe()
656 			parse_options_usage(NULL, options, "x", true);  in __cmd_probe()
657 			return -EINVAL;  in __cmd_probe()
699 			pr_err("  Error: -x/-m must follow the probe definitions.\n");  in __cmd_probe()
701 			parse_options_usage(NULL, options, "x", true);  in __cmd_probe()
702 			return -EINVAL;  in __cmd_probe()