[linux-2.6-block.git] / tools / perf / builtin-annotate.c

/*
 * builtin-annotate.c
 *
 * Builtin annotate command: Analyze the perf.data input file,
 * look up and read DSOs and symbol information and display
 * a histogram of results, along various sorting keys.
 */
#include "builtin.h"

#include "util/util.h"
#include "util/color.h"
#include <linux/list.h>
#include "util/cache.h"
#include <linux/rbtree.h>
#include "util/symbol.h"

#include "perf.h"
#include "util/debug.h"

#include "util/evlist.h"
#include "util/evsel.h"
#include "util/annotate.h"
#include "util/event.h"
#include "util/parse-options.h"
#include "util/parse-events.h"
#include "util/thread.h"
#include "util/sort.h"
#include "util/hist.h"
#include "util/session.h"
#include "util/tool.h"
#include "util/data.h"
#include "arch/common.h"

#include <dlfcn.h>
#include <linux/bitmap.h>

struct perf_annotate {
	struct perf_tool tool;
	struct perf_session *session;
	bool	   use_tui, use_stdio, use_gtk;
	bool	   full_paths;
	bool	   print_line;
	bool	   skip_missing;
	const char *sym_hist_filter;
	const char *cpu_list;
	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
};

static int perf_evsel__add_sample(struct perf_evsel *evsel,
				  struct perf_sample *sample __maybe_unused,
				  struct addr_location *al,
				  struct perf_annotate *ann)
{
	struct hists *hists = evsel__hists(evsel);
	struct hist_entry *he;
	int ret;

	if (ann->sym_hist_filter != NULL &&
	    (al->sym == NULL ||
	     strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
		/* We're only interested in a symbol named sym_hist_filter */
		if (al->sym != NULL) {
			rb_erase(&al->sym->rb_node,
				 &al->map->dso->symbols[al->map->type]);
			symbol__delete(al->sym);
		}
		return 0;
	}

	he = __hists__add_entry(hists, al, NULL, NULL, NULL, 1, 1, 0, true);
	if (he == NULL)
		return -ENOMEM;

	ret = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
	hists__inc_nr_samples(hists, true);
	return ret;
}

static int process_sample_event(struct perf_tool *tool,
				union perf_event *event,
				struct perf_sample *sample,
				struct perf_evsel *evsel,
				struct machine *machine)
{
	struct perf_annotate *ann = container_of(tool, struct perf_annotate, tool);
	struct addr_location al;

	if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
		pr_warning("problem processing %d event, skipping it.\n",
			   event->header.type);
		return -1;
	}

	if (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
		return 0;

	if (!al.filtered && perf_evsel__add_sample(evsel, sample, &al, ann)) {
		pr_warning("problem incrementing symbol count, "
			   "skipping event\n");
		return -1;
	}

	return 0;
}

static int hist_entry__tty_annotate(struct hist_entry *he,
				    struct perf_evsel *evsel,
				    struct perf_annotate *ann)
{
	return symbol__tty_annotate(he->ms.sym, he->ms.map, evsel,
				    ann->print_line, ann->full_paths, 0, 0);
}

static void hists__find_annotations(struct hists *hists,
				    struct perf_evsel *evsel,
				    struct perf_annotate *ann)
{
	struct rb_node *nd = rb_first(&hists->entries), *next;
	int key = K_RIGHT;

	while (nd) {
		struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
		struct annotation *notes;

		if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned)
			goto find_next;

		notes = symbol__annotation(he->ms.sym);
		if (notes->src == NULL) {
find_next:
			if (key == K_LEFT)
				nd = rb_prev(nd);
			else
				nd = rb_next(nd);
			continue;
		}

		if (use_browser == 2) {
			int ret;
			int (*annotate)(struct hist_entry *he,
					struct perf_evsel *evsel,
					struct hist_browser_timer *hbt);

			annotate = dlsym(perf_gtk_handle,
					 "hist_entry__gtk_annotate");
			if (annotate == NULL) {
				ui__error("GTK browser not found!\n");
				return;
			}

			ret = annotate(he, evsel, NULL);
			if (!ret || !ann->skip_missing)
				return;

			/* skip missing symbols */
			nd = rb_next(nd);
		} else if (use_browser == 1) {
			key = hist_entry__tui_annotate(he, evsel, NULL);
			switch (key) {
			case -1:
				if (!ann->skip_missing)
					return;
				/* fall through */
			case K_RIGHT:
				next = rb_next(nd);
				break;
			case K_LEFT:
				next = rb_prev(nd);
				break;
			default:
				return;
			}

			if (next != NULL)
				nd = next;
		} else {
			hist_entry__tty_annotate(he, evsel, ann);
			nd = rb_next(nd);
			/*
			 * Since we have a hist_entry per IP for the same
			 * symbol, free he->ms.sym->src to signal we already
			 * processed this symbol.
			 */
			zfree(&notes->src);
		}
	}
}

static int __cmd_annotate(struct perf_annotate *ann)
{
	int ret;
	struct perf_session *session = ann->session;
	struct perf_evsel *pos;
	u64 total_nr_samples;

	machines__set_symbol_filter(&session->machines, symbol__annotate_init);

	if (ann->cpu_list) {
		ret = perf_session__cpu_bitmap(session, ann->cpu_list,
					       ann->cpu_bitmap);
		if (ret)
			goto out;
	}

	if (!objdump_path) {
		ret = perf_session_env__lookup_objdump(&session->header.env);
		if (ret)
			goto out;
	}

	ret = perf_session__process_events(session);
	if (ret)
		goto out;

	if (dump_trace) {
		perf_session__fprintf_nr_events(session, stdout);
		perf_evlist__fprintf_nr_events(session->evlist, stdout);
		goto out;
	}

	if (verbose > 3)
		perf_session__fprintf(session, stdout);

	if (verbose > 2)
		perf_session__fprintf_dsos(session, stdout);

	total_nr_samples = 0;
	evlist__for_each(session->evlist, pos) {
		struct hists *hists = evsel__hists(pos);
		u32 nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];

		if (nr_samples > 0) {
			total_nr_samples += nr_samples;
			hists__collapse_resort(hists, NULL);
			hists__output_resort(hists, NULL);

			if (symbol_conf.event_group &&
			    !perf_evsel__is_group_leader(pos))
				continue;

			hists__find_annotations(hists, pos, ann);
		}
	}

	if (total_nr_samples == 0) {
		ui__error("The %s file has no samples!\n", session->file->path);
		goto out;
	}

	if (use_browser == 2) {
		void (*show_annotations)(void);

		show_annotations = dlsym(perf_gtk_handle,
					 "perf_gtk__show_annotations");
		if (show_annotations == NULL) {
			ui__error("GTK browser not found!\n");
			goto out;
		}
		show_annotations();
	}

out:
	return ret;
}

static const char * const annotate_usage[] = {
	"perf annotate [<options>]",
	NULL
};

int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
{
	struct perf_annotate annotate = {
		.tool = {
			.sample	= process_sample_event,
			.mmap	= perf_event__process_mmap,
			.mmap2	= perf_event__process_mmap2,
			.comm	= perf_event__process_comm,
			.exit	= perf_event__process_exit,
			.fork	= perf_event__process_fork,
			.ordered_events = true,
			.ordering_requires_timestamps = true,
		},
	};
	struct perf_data_file file = {
		.path  = input_name,
		.mode  = PERF_DATA_MODE_READ,
	};
	const struct option options[] = {
	OPT_STRING('i', "input", &input_name, "file",
		    "input file name"),
	OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
		   "only consider symbols in these dsos"),
	OPT_STRING('s', "symbol", &annotate.sym_hist_filter, "symbol",
		    "symbol to annotate"),
	OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
	OPT_INCR('v', "verbose", &verbose,
		    "be more verbose (show symbol address, etc)"),
	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
		    "dump raw trace in ASCII"),
	OPT_BOOLEAN(0, "gtk", &annotate.use_gtk, "Use the GTK interface"),
	OPT_BOOLEAN(0, "tui", &annotate.use_tui, "Use the TUI interface"),
	OPT_BOOLEAN(0, "stdio", &annotate.use_stdio, "Use the stdio interface"),
	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
		   "file", "vmlinux pathname"),
	OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
		    "load module symbols - WARNING: use only with -k and LIVE kernel"),
	OPT_BOOLEAN('l', "print-line", &annotate.print_line,
		    "print matching source lines (may be slow)"),
	OPT_BOOLEAN('P', "full-paths", &annotate.full_paths,
		    "Don't shorten the displayed pathnames"),
	OPT_BOOLEAN(0, "skip-missing", &annotate.skip_missing,
		    "Skip symbols that cannot be annotated"),
	OPT_STRING('C', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),
	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
		   "Look for files with symbols relative to this directory"),
	OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
		    "Interleave source code with assembly code (default)"),
	OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
		    "Display raw encoding of assembly instructions (default)"),
	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
	OPT_STRING(0, "objdump", &objdump_path, "path",
		   "objdump binary to use for disassembly and annotations"),
	OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
		    "Show event group information together"),
	OPT_END()
	};
	int ret = hists__init();

	if (ret < 0)
		return ret;

	argc = parse_options(argc, argv, options, annotate_usage, 0);

	if (annotate.use_stdio)
		use_browser = 0;
	else if (annotate.use_tui)
		use_browser = 1;
	else if (annotate.use_gtk)
		use_browser = 2;

	setup_browser(true);

	annotate.session = perf_session__new(&file, false, &annotate.tool);
	if (annotate.session == NULL)
		return -1;

	symbol_conf.priv_size = sizeof(struct annotation);
	symbol_conf.try_vmlinux_path = true;

	ret = symbol__init(&annotate.session->header.env);
	if (ret < 0)
		goto out_delete;

	if (setup_sorting() < 0)
		usage_with_options(annotate_usage, options);

	if (argc) {
		/*
		 * Special case: if there's an argument left then assume that
		 * it's a symbol filter:
		 */
		if (argc > 1)
			usage_with_options(annotate_usage, options);

		annotate.sym_hist_filter = argv[0];
	}

	ret = __cmd_annotate(&annotate);

out_delete:
	/*
	 * Speed up the exit process, for large files this can
	 * take quite a while.
	 *
	 * XXX Enable this when using valgrind or if we ever
	 * librarize this command.
	 *
	 * Also experiment with obstacks to see how much speed
	 * up we'll get here.
	 *
	 * perf_session__delete(session);
	 */
	return ret;
}
Commit	Line	Data
	1	/*
	2	* builtin-annotate.c
	3	*
	4	* Builtin annotate command: Analyze the perf.data input file,
	5	* look up and read DSOs and symbol information and display
	6	* a histogram of results, along various sorting keys.
	7	*/
	8	#include "builtin.h"
	9
	10	#include "util/util.h"
	11	#include "util/color.h"
	12	#include <linux/list.h>
	13	#include "util/cache.h"
	14	#include <linux/rbtree.h>
	15	#include "util/symbol.h"
	16
	17	#include "perf.h"
	18	#include "util/debug.h"
	19
	20	#include "util/evlist.h"
	21	#include "util/evsel.h"
	22	#include "util/annotate.h"
	23	#include "util/event.h"
	24	#include "util/parse-options.h"
	25	#include "util/parse-events.h"
	26	#include "util/thread.h"
	27	#include "util/sort.h"
	28	#include "util/hist.h"
	29	#include "util/session.h"
	30	#include "util/tool.h"
	31	#include "util/data.h"
	32	#include "arch/common.h"
	33
	34	#include <dlfcn.h>
	35	#include <linux/bitmap.h>
	36
	37	struct perf_annotate {
	38	struct perf_tool tool;
	39	struct perf_session *session;
	40	bool use_tui, use_stdio, use_gtk;
	41	bool full_paths;
	42	bool print_line;
	43	bool skip_missing;
	44	const char *sym_hist_filter;
	45	const char *cpu_list;
	46	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
	47	};
	48
	49	static int perf_evsel__add_sample(struct perf_evsel *evsel,
	50	struct perf_sample *sample __maybe_unused,
	51	struct addr_location *al,
	52	struct perf_annotate *ann)
	53	{
	54	struct hists *hists = evsel__hists(evsel);
	55	struct hist_entry *he;
	56	int ret;
	57
	58	if (ann->sym_hist_filter != NULL &&
	59	(al->sym == NULL \|\|
	60	strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
	61	/* We're only interested in a symbol named sym_hist_filter */
	62	if (al->sym != NULL) {
	63	rb_erase(&al->sym->rb_node,
	64	&al->map->dso->symbols[al->map->type]);
	65	symbol__delete(al->sym);
	66	}
	67	return 0;
	68	}
	69
	70	he = __hists__add_entry(hists, al, NULL, NULL, NULL, 1, 1, 0, true);
	71	if (he == NULL)
	72	return -ENOMEM;
	73
	74	ret = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
	75	hists__inc_nr_samples(hists, true);
	76	return ret;
	77	}
	78
	79	static int process_sample_event(struct perf_tool *tool,
	80	union perf_event *event,
	81	struct perf_sample *sample,
	82	struct perf_evsel *evsel,
	83	struct machine *machine)
	84	{
	85	struct perf_annotate *ann = container_of(tool, struct perf_annotate, tool);
	86	struct addr_location al;
	87
	88	if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
	89	pr_warning("problem processing %d event, skipping it.\n",
	90	event->header.type);
	91	return -1;
	92	}
	93
	94	if (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
	95	return 0;
	96
	97	if (!al.filtered && perf_evsel__add_sample(evsel, sample, &al, ann)) {
	98	pr_warning("problem incrementing symbol count, "
	99	"skipping event\n");
	100	return -1;
	101	}
	102
	103	return 0;
	104	}
	105
	106	static int hist_entry__tty_annotate(struct hist_entry *he,
	107	struct perf_evsel *evsel,
	108	struct perf_annotate *ann)
	109	{
	110	return symbol__tty_annotate(he->ms.sym, he->ms.map, evsel,
	111	ann->print_line, ann->full_paths, 0, 0);
	112	}
	113
	114	static void hists__find_annotations(struct hists *hists,
	115	struct perf_evsel *evsel,
	116	struct perf_annotate *ann)
	117	{
	118	struct rb_node nd = rb_first(&hists->entries), next;
	119	int key = K_RIGHT;
	120
	121	while (nd) {
	122	struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
	123	struct annotation *notes;
	124
	125	if (he->ms.sym == NULL \|\| he->ms.map->dso->annotate_warned)
	126	goto find_next;
	127
	128	notes = symbol__annotation(he->ms.sym);
	129	if (notes->src == NULL) {
	130	find_next:
	131	if (key == K_LEFT)
	132	nd = rb_prev(nd);
	133	else
	134	nd = rb_next(nd);
	135	continue;
	136	}
	137
	138	if (use_browser == 2) {
	139	int ret;
	140	int (annotate)(struct hist_entry he,
	141	struct perf_evsel *evsel,
	142	struct hist_browser_timer *hbt);
	143
	144	annotate = dlsym(perf_gtk_handle,
	145	"hist_entry__gtk_annotate");
	146	if (annotate == NULL) {
	147	ui__error("GTK browser not found!\n");
	148	return;
	149	}
	150
	151	ret = annotate(he, evsel, NULL);
	152	if (!ret \|\| !ann->skip_missing)
	153	return;
	154
	155	/* skip missing symbols */
	156	nd = rb_next(nd);
	157	} else if (use_browser == 1) {
	158	key = hist_entry__tui_annotate(he, evsel, NULL);
	159	switch (key) {
	160	case -1:
	161	if (!ann->skip_missing)
	162	return;
	163	/* fall through */
	164	case K_RIGHT:
	165	next = rb_next(nd);
	166	break;
	167	case K_LEFT:
	168	next = rb_prev(nd);
	169	break;
	170	default:
	171	return;
	172	}
	173
	174	if (next != NULL)
	175	nd = next;
	176	} else {
	177	hist_entry__tty_annotate(he, evsel, ann);
	178	nd = rb_next(nd);
	179	/*
	180	* Since we have a hist_entry per IP for the same
	181	* symbol, free he->ms.sym->src to signal we already
	182	* processed this symbol.
	183	*/
	184	zfree(&notes->src);
	185	}
	186	}
	187	}
	188
	189	static int __cmd_annotate(struct perf_annotate *ann)
	190	{
	191	int ret;
	192	struct perf_session *session = ann->session;
	193	struct perf_evsel *pos;
	194	u64 total_nr_samples;
	195
	196	machines__set_symbol_filter(&session->machines, symbol__annotate_init);
	197
	198	if (ann->cpu_list) {
	199	ret = perf_session__cpu_bitmap(session, ann->cpu_list,
	200	ann->cpu_bitmap);
	201	if (ret)
	202	goto out;
	203	}
	204
	205	if (!objdump_path) {
	206	ret = perf_session_env__lookup_objdump(&session->header.env);
	207	if (ret)
	208	goto out;
	209	}
	210
	211	ret = perf_session__process_events(session);
	212	if (ret)
	213	goto out;
	214
	215	if (dump_trace) {
	216	perf_session__fprintf_nr_events(session, stdout);
	217	perf_evlist__fprintf_nr_events(session->evlist, stdout);
	218	goto out;
	219	}
	220
	221	if (verbose > 3)
	222	perf_session__fprintf(session, stdout);
	223
	224	if (verbose > 2)
	225	perf_session__fprintf_dsos(session, stdout);
	226
	227	total_nr_samples = 0;
	228	evlist__for_each(session->evlist, pos) {
	229	struct hists *hists = evsel__hists(pos);
	230	u32 nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
	231
	232	if (nr_samples > 0) {
	233	total_nr_samples += nr_samples;
	234	hists__collapse_resort(hists, NULL);
	235	hists__output_resort(hists, NULL);
	236
	237	if (symbol_conf.event_group &&
	238	!perf_evsel__is_group_leader(pos))
	239	continue;
	240
	241	hists__find_annotations(hists, pos, ann);
	242	}
	243	}
	244
	245	if (total_nr_samples == 0) {
	246	ui__error("The %s file has no samples!\n", session->file->path);
	247	goto out;
	248	}
	249
	250	if (use_browser == 2) {
	251	void (*show_annotations)(void);
	252
	253	show_annotations = dlsym(perf_gtk_handle,
	254	"perf_gtk__show_annotations");
	255	if (show_annotations == NULL) {
	256	ui__error("GTK browser not found!\n");
	257	goto out;
	258	}
	259	show_annotations();
	260	}
	261
	262	out:
	263	return ret;
	264	}
	265
	266	static const char * const annotate_usage[] = {
	267	"perf annotate [<options>]",
	268	NULL
	269	};
	270
	271	int cmd_annotate(int argc, const char *argv, const char prefix __maybe_unused)
	272	{
	273	struct perf_annotate annotate = {
	274	.tool = {
	275	.sample = process_sample_event,
	276	.mmap = perf_event__process_mmap,
	277	.mmap2 = perf_event__process_mmap2,
	278	.comm = perf_event__process_comm,
	279	.exit = perf_event__process_exit,
	280	.fork = perf_event__process_fork,
	281	.ordered_events = true,
	282	.ordering_requires_timestamps = true,
	283	},
	284	};
	285	struct perf_data_file file = {
	286	.path = input_name,
	287	.mode = PERF_DATA_MODE_READ,
	288	};
	289	const struct option options[] = {
	290	OPT_STRING('i', "input", &input_name, "file",
	291	"input file name"),
	292	OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
	293	"only consider symbols in these dsos"),
	294	OPT_STRING('s', "symbol", &annotate.sym_hist_filter, "symbol",
	295	"symbol to annotate"),
	296	OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
	297	OPT_INCR('v', "verbose", &verbose,
	298	"be more verbose (show symbol address, etc)"),
	299	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
	300	"dump raw trace in ASCII"),
	301	OPT_BOOLEAN(0, "gtk", &annotate.use_gtk, "Use the GTK interface"),
	302	OPT_BOOLEAN(0, "tui", &annotate.use_tui, "Use the TUI interface"),
	303	OPT_BOOLEAN(0, "stdio", &annotate.use_stdio, "Use the stdio interface"),
	304	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
	305	"file", "vmlinux pathname"),
	306	OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
	307	"load module symbols - WARNING: use only with -k and LIVE kernel"),
	308	OPT_BOOLEAN('l', "print-line", &annotate.print_line,
	309	"print matching source lines (may be slow)"),
	310	OPT_BOOLEAN('P', "full-paths", &annotate.full_paths,
	311	"Don't shorten the displayed pathnames"),
	312	OPT_BOOLEAN(0, "skip-missing", &annotate.skip_missing,
	313	"Skip symbols that cannot be annotated"),
	314	OPT_STRING('C', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),
	315	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
	316	"Look for files with symbols relative to this directory"),
	317	OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
	318	"Interleave source code with assembly code (default)"),
	319	OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
	320	"Display raw encoding of assembly instructions (default)"),
	321	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
	322	"Specify disassembler style (e.g. -M intel for intel syntax)"),
	323	OPT_STRING(0, "objdump", &objdump_path, "path",
	324	"objdump binary to use for disassembly and annotations"),
	325	OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
	326	"Show event group information together"),
	327	OPT_END()
	328	};
	329	int ret = hists__init();
	330
	331	if (ret < 0)
	332	return ret;
	333
	334	argc = parse_options(argc, argv, options, annotate_usage, 0);
	335
	336	if (annotate.use_stdio)
	337	use_browser = 0;
	338	else if (annotate.use_tui)
	339	use_browser = 1;
	340	else if (annotate.use_gtk)
	341	use_browser = 2;
	342
	343	setup_browser(true);
	344
	345	annotate.session = perf_session__new(&file, false, &annotate.tool);
	346	if (annotate.session == NULL)
	347	return -1;
	348
	349	symbol_conf.priv_size = sizeof(struct annotation);
	350	symbol_conf.try_vmlinux_path = true;
	351
	352	ret = symbol__init(&annotate.session->header.env);
	353	if (ret < 0)
	354	goto out_delete;
	355
	356	if (setup_sorting() < 0)
	357	usage_with_options(annotate_usage, options);
	358
	359	if (argc) {
	360	/*
	361	* Special case: if there's an argument left then assume that
	362	* it's a symbol filter:
	363	*/
	364	if (argc > 1)
	365	usage_with_options(annotate_usage, options);
	366
	367	annotate.sym_hist_filter = argv[0];
	368	}
	369
	370	ret = __cmd_annotate(&annotate);
	371
	372	out_delete:
	373	/*
	374	* Speed up the exit process, for large files this can
	375	* take quite a while.
	376	*
	377	* XXX Enable this when using valgrind or if we ever
	378	* librarize this command.
	379	*
	380	* Also experiment with obstacks to see how much speed
	381	* up we'll get here.
	382	*
	383	* perf_session__delete(session);
	384	*/
	385	return ret;
	386	}