tools/perf/builtin-report.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  * builtin-report.c
  *
  * Builtin report 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/annotate.h"
 #include "util/color.h"
 #include <linux/list.h>
 #include "util/cache.h"
 #include <linux/rbtree.h>
 #include "util/symbol.h"
 #include "util/callchain.h"
 #include "util/strlist.h"
 #include "util/values.h"

 #include "perf.h"
 #include "util/debug.h"
 #include "util/evlist.h"
 #include "util/evsel.h"
 #include "util/header.h"
 #include "util/session.h"
 #include "util/tool.h"

 #include "util/parse-options.h"
 #include "util/parse-events.h"

 #include "util/thread.h"
 #include "util/sort.h"
 #include "util/hist.h"

 #include <linux/bitmap.h>

 struct perf_report {
 	struct perf_tool	tool;
 	struct perf_session	*session;
 	char const		*input_name;
 	bool			force, use_tui, use_gtk, use_stdio;
 	bool			hide_unresolved;
 	bool			dont_use_callchains;
 	bool			show_full_info;
 	bool			show_threads;
 	bool			inverted_callchain;
 	struct perf_read_values	show_threads_values;
 	const char		*pretty_printing_style;
 	symbol_filter_t		annotate_init;
 	const char		*cpu_list;
 	const char		*symbol_filter_str;
 	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
 };

 static int perf_report__add_branch_hist_entry(struct perf_tool *tool,
 					struct addr_location *al,
 					struct perf_sample *sample,
 					struct perf_evsel *evsel,
 				      struct machine *machine)
 {
 	struct perf_report *rep = container_of(tool, struct perf_report, tool);
 	struct symbol *parent = NULL;
 	int err = 0;
 	unsigned i;
 	struct hist_entry *he;
 	struct branch_info *bi, *bx;

 	if ((sort__has_parent || symbol_conf.use_callchain)
 	    && sample->callchain) {
 		err = machine__resolve_callchain(machine, evsel, al->thread,
 						 sample, &parent);
 		if (err)
 			return err;
 	}

 	bi = machine__resolve_bstack(machine, al->thread,
 				     sample->branch_stack);
 	if (!bi)
 		return -ENOMEM;

 	for (i = 0; i < sample->branch_stack->nr; i++) {
 		if (rep->hide_unresolved && !(bi[i].from.sym && bi[i].to.sym))
 			continue;
 		/*
 		 * The report shows the percentage of total branches captured
 		 * and not events sampled. Thus we use a pseudo period of 1.
 		 */
 		he = __hists__add_branch_entry(&evsel->hists, al, parent,
 				&bi[i], 1);
 		if (he) {
 			struct annotation *notes;
 			err = -ENOMEM;
 			bx = he->branch_info;
 			if (bx->from.sym && use_browser > 0) {
 				notes = symbol__annotation(bx->from.sym);
 				if (!notes->src
 				    && symbol__alloc_hist(bx->from.sym) < 0)
 					goto out;

 				err = symbol__inc_addr_samples(bx->from.sym,
 							       bx->from.map,
 							       evsel->idx,
 							       bx->from.al_addr);
 				if (err)
 					goto out;
 			}

 			if (bx->to.sym && use_browser > 0) {
 				notes = symbol__annotation(bx->to.sym);
 				if (!notes->src
 				    && symbol__alloc_hist(bx->to.sym) < 0)
 					goto out;

 				err = symbol__inc_addr_samples(bx->to.sym,
 							       bx->to.map,
 							       evsel->idx,
 							       bx->to.al_addr);
 				if (err)
 					goto out;
 			}
 			evsel->hists.stats.total_period += 1;
 			hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
 			err = 0;
 		} else
 			return -ENOMEM;
 	}
 out:
 	return err;
 }

 static int perf_evsel__add_hist_entry(struct perf_evsel *evsel,
 				      struct addr_location *al,
 				      struct perf_sample *sample,
 				      struct machine *machine)
 {
 	struct symbol *parent = NULL;
 	int err = 0;
 	struct hist_entry *he;

 	if ((sort__has_parent || symbol_conf.use_callchain) && sample->callchain) {
 		err = machine__resolve_callchain(machine, evsel, al->thread,
 						 sample, &parent);
 		if (err)
 			return err;
 	}

 	he = __hists__add_entry(&evsel->hists, al, parent, sample->period);
 	if (he == NULL)
 		return -ENOMEM;

 	if (symbol_conf.use_callchain) {
 		err = callchain_append(he->callchain,
 				       &callchain_cursor,
 				       sample->period);
 		if (err)
 			return err;
 	}
 	/*
 	 * Only in the newt browser we are doing integrated annotation,
 	 * so we don't allocated the extra space needed because the stdio
 	 * code will not use it.
 	 */
 	if (he->ms.sym != NULL && use_browser > 0) {
 		struct annotation *notes = symbol__annotation(he->ms.sym);

 		assert(evsel != NULL);

 		err = -ENOMEM;
 		if (notes->src == NULL && symbol__alloc_hist(he->ms.sym) < 0)
 			goto out;

 		err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
 	}

 	evsel->hists.stats.total_period += sample->period;
 	hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
 out:
 	return err;
 }


 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_report *rep = container_of(tool, struct perf_report, tool);
 	struct addr_location al;

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

 	if (al.filtered || (rep->hide_unresolved && al.sym == NULL))
 		return 0;

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

 	if (sort__branch_mode == 1) {
 		if (perf_report__add_branch_hist_entry(tool, &al, sample,
 						       evsel, machine)) {
 			pr_debug("problem adding lbr entry, skipping event\n");
 			return -1;
 		}
 	} else {
 		if (al.map != NULL)
 			al.map->dso->hit = 1;

 		if (perf_evsel__add_hist_entry(evsel, &al, sample, machine)) {
 			pr_debug("problem incrementing symbol period, skipping event\n");
 			return -1;
 		}
 	}
 	return 0;
 }

 static int process_read_event(struct perf_tool *tool,
 			      union perf_event *event,
 			      struct perf_sample *sample __maybe_unused,
 			      struct perf_evsel *evsel,
 			      struct machine *machine __maybe_unused)
 {
 	struct perf_report *rep = container_of(tool, struct perf_report, tool);

 	if (rep->show_threads) {
 		const char *name = evsel ? perf_evsel__name(evsel) : "unknown";
 		perf_read_values_add_value(&rep->show_threads_values,
 					   event->read.pid, event->read.tid,
 					   event->read.id,
 					   name,
 					   event->read.value);
 	}

 	dump_printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid,
 		    evsel ? perf_evsel__name(evsel) : "FAIL",
 		    event->read.value);

 	return 0;
 }

 /* For pipe mode, sample_type is not currently set */
 static int perf_report__setup_sample_type(struct perf_report *rep)
 {
 	struct perf_session *self = rep->session;
 	u64 sample_type = perf_evlist__sample_type(self->evlist);

 	if (!self->fd_pipe && !(sample_type & PERF_SAMPLE_CALLCHAIN)) {
 		if (sort__has_parent) {
 			ui__error("Selected --sort parent, but no "
 				    "callchain data. Did you call "
 				    "'perf record' without -g?\n");
 			return -EINVAL;
 		}
 		if (symbol_conf.use_callchain) {
 			ui__error("Selected -g but no callchain data. Did "
 				    "you call 'perf record' without -g?\n");
 			return -1;
 		}
 	} else if (!rep->dont_use_callchains &&
 		   callchain_param.mode != CHAIN_NONE &&
 		   !symbol_conf.use_callchain) {
 			symbol_conf.use_callchain = true;
 			if (callchain_register_param(&callchain_param) < 0) {
 				ui__error("Can't register callchain params.\n");
 				return -EINVAL;
 			}
 	}

 	if (sort__branch_mode == 1) {
 		if (!self->fd_pipe &&
 		    !(sample_type & PERF_SAMPLE_BRANCH_STACK)) {
 			ui__error("Selected -b but no branch data. "
 				  "Did you call perf record without -b?\n");
 			return -1;
 		}
 	}

 	return 0;
 }

 extern volatile int session_done;

 static void sig_handler(int sig __maybe_unused)
 {
 	session_done = 1;
 }

 static size_t hists__fprintf_nr_sample_events(struct hists *self,
 					      const char *evname, FILE *fp)
 {
 	size_t ret;
 	char unit;
 	unsigned long nr_samples = self->stats.nr_events[PERF_RECORD_SAMPLE];
 	u64 nr_events = self->stats.total_period;

 	nr_samples = convert_unit(nr_samples, &unit);
 	ret = fprintf(fp, "# Samples: %lu%c", nr_samples, unit);
 	if (evname != NULL)
 		ret += fprintf(fp, " of event '%s'", evname);

 	ret += fprintf(fp, "\n# Event count (approx.): %" PRIu64, nr_events);
 	return ret + fprintf(fp, "\n#\n");
 }

 static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
 					 struct perf_report *rep,
 					 const char *help)
 {
 	struct perf_evsel *pos;

 	list_for_each_entry(pos, &evlist->entries, node) {
 		struct hists *hists = &pos->hists;
 		const char *evname = perf_evsel__name(pos);

 		hists__fprintf_nr_sample_events(hists, evname, stdout);
 		hists__fprintf(hists, NULL, false, true, 0, 0, stdout);
 		fprintf(stdout, "\n\n");
 	}

 	if (sort_order == default_sort_order &&
 	    parent_pattern == default_parent_pattern) {
 		fprintf(stdout, "#\n# (%s)\n#\n", help);

 		if (rep->show_threads) {
 			bool style = !strcmp(rep->pretty_printing_style, "raw");
 			perf_read_values_display(stdout, &rep->show_threads_values,
 						 style);
 			perf_read_values_destroy(&rep->show_threads_values);
 		}
 	}

 	return 0;
 }

 static int __cmd_report(struct perf_report *rep)
 {
 	int ret = -EINVAL;
 	u64 nr_samples;
 	struct perf_session *session = rep->session;
 	struct perf_evsel *pos;
 	struct map *kernel_map;
 	struct kmap *kernel_kmap;
 	const char *help = "For a higher level overview, try: perf report --sort comm,dso";

 	signal(SIGINT, sig_handler);

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

 	if (use_browser <= 0)
 		perf_session__fprintf_info(session, stdout, rep->show_full_info);

 	if (rep->show_threads)
 		perf_read_values_init(&rep->show_threads_values);

 	ret = perf_report__setup_sample_type(rep);
 	if (ret)
 		goto out_delete;

 	ret = perf_session__process_events(session, &rep->tool);
 	if (ret)
 		goto out_delete;

 	kernel_map = session->host_machine.vmlinux_maps[MAP__FUNCTION];
 	kernel_kmap = map__kmap(kernel_map);
 	if (kernel_map == NULL ||
 	    (kernel_map->dso->hit &&
 	     (kernel_kmap->ref_reloc_sym == NULL ||
 	      kernel_kmap->ref_reloc_sym->addr == 0))) {
 		const char *desc =
 		    "As no suitable kallsyms nor vmlinux was found, kernel samples\n"
 		    "can't be resolved.";

 		if (kernel_map) {
 			const struct dso *kdso = kernel_map->dso;
 			if (!RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION])) {
 				desc = "If some relocation was applied (e.g. "
 				       "kexec) symbols may be misresolved.";
 			}
 		}

 		ui__warning(
 "Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n"
 "Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n"
 "Samples in kernel modules can't be resolved as well.\n\n",
 		desc);
 	}

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

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

 	if (dump_trace) {
 		perf_session__fprintf_nr_events(session, stdout);
 		goto out_delete;
 	}

 	nr_samples = 0;
 	list_for_each_entry(pos, &session->evlist->entries, node) {
 		struct hists *hists = &pos->hists;

 		if (pos->idx == 0)
 			hists->symbol_filter_str = rep->symbol_filter_str;

 		hists__collapse_resort(hists);
 		hists__output_resort(hists);
 		nr_samples += hists->stats.nr_events[PERF_RECORD_SAMPLE];
 	}

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

 	if (use_browser > 0) {
 		if (use_browser == 1) {
 			perf_evlist__tui_browse_hists(session->evlist, help,
 						      NULL, NULL, 0);
 		} else if (use_browser == 2) {
 			perf_evlist__gtk_browse_hists(session->evlist, help,
 						      NULL, NULL, 0);
 		}
 	} else
 		perf_evlist__tty_browse_hists(session->evlist, rep, help);

 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;
 }

 static int
 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
 {
 	struct perf_report *rep = (struct perf_report *)opt->value;
 	char *tok, *tok2;
 	char *endptr;

 	/*
 	 * --no-call-graph
 	 */
 	if (unset) {
 		rep->dont_use_callchains = true;
 		return 0;
 	}

 	symbol_conf.use_callchain = true;

 	if (!arg)
 		return 0;

 	tok = strtok((char *)arg, ",");
 	if (!tok)
 		return -1;

 	/* get the output mode */
 	if (!strncmp(tok, "graph", strlen(arg)))
 		callchain_param.mode = CHAIN_GRAPH_ABS;

 	else if (!strncmp(tok, "flat", strlen(arg)))
 		callchain_param.mode = CHAIN_FLAT;

 	else if (!strncmp(tok, "fractal", strlen(arg)))
 		callchain_param.mode = CHAIN_GRAPH_REL;

 	else if (!strncmp(tok, "none", strlen(arg))) {
 		callchain_param.mode = CHAIN_NONE;
 		symbol_conf.use_callchain = false;

 		return 0;
 	}

 	else
 		return -1;

 	/* get the min percentage */
 	tok = strtok(NULL, ",");
 	if (!tok)
 		goto setup;

 	callchain_param.min_percent = strtod(tok, &endptr);
 	if (tok == endptr)
 		return -1;

 	/* get the print limit */
 	tok2 = strtok(NULL, ",");
 	if (!tok2)
 		goto setup;

 	if (tok2[0] != 'c') {
 		callchain_param.print_limit = strtoul(tok2, &endptr, 0);
 		tok2 = strtok(NULL, ",");
 		if (!tok2)
 			goto setup;
 	}

 	/* get the call chain order */
 	if (!strcmp(tok2, "caller"))
 		callchain_param.order = ORDER_CALLER;
 	else if (!strcmp(tok2, "callee"))
 		callchain_param.order = ORDER_CALLEE;
 	else
 		return -1;
 setup:
 	if (callchain_register_param(&callchain_param) < 0) {
 		fprintf(stderr, "Can't register callchain params\n");
 		return -1;
 	}
 	return 0;
 }

 static int
 parse_branch_mode(const struct option *opt __maybe_unused,
 		  const char *str __maybe_unused, int unset)
 {
 	sort__branch_mode = !unset;
 	return 0;
 }

 int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
 {
 	struct perf_session *session;
 	struct stat st;
 	bool has_br_stack = false;
 	int ret = -1;
 	char callchain_default_opt[] = "fractal,0.5,callee";
 	const char * const report_usage[] = {
 		"perf report [<options>]",
 		NULL
 	};
 	struct perf_report report = {
 		.tool = {
 			.sample		 = process_sample_event,
 			.mmap		 = perf_event__process_mmap,
 			.comm		 = perf_event__process_comm,
 			.exit		 = perf_event__process_task,
 			.fork		 = perf_event__process_task,
 			.lost		 = perf_event__process_lost,
 			.read		 = process_read_event,
 			.attr		 = perf_event__process_attr,
 			.event_type	 = perf_event__process_event_type,
 			.tracing_data	 = perf_event__process_tracing_data,
 			.build_id	 = perf_event__process_build_id,
 			.ordered_samples = true,
 			.ordering_requires_timestamps = true,
 		},
 		.pretty_printing_style	 = "normal",
 	};
 	const struct option options[] = {
 	OPT_STRING('i', "input", &report.input_name, "file",
 		    "input file name"),
 	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_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
 		   "file", "vmlinux pathname"),
 	OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
 		   "file", "kallsyms pathname"),
 	OPT_BOOLEAN('f', "force", &report.force, "don't complain, do it"),
 	OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
 		    "load module symbols - WARNING: use only with -k and LIVE kernel"),
 	OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
 		    "Show a column with the number of samples"),
 	OPT_BOOLEAN('T', "threads", &report.show_threads,
 		    "Show per-thread event counters"),
 	OPT_STRING(0, "pretty", &report.pretty_printing_style, "key",
 		   "pretty printing style key: normal raw"),
 	OPT_BOOLEAN(0, "tui", &report.use_tui, "Use the TUI interface"),
 	OPT_BOOLEAN(0, "gtk", &report.use_gtk, "Use the GTK2 interface"),
 	OPT_BOOLEAN(0, "stdio", &report.use_stdio,
 		    "Use the stdio interface"),
 	OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
 		   "sort by key(s): pid, comm, dso, symbol, parent, dso_to,"
 		   " dso_from, symbol_to, symbol_from, mispredict"),
 	OPT_BOOLEAN(0, "showcpuutilization", &symbol_conf.show_cpu_utilization,
 		    "Show sample percentage for different cpu modes"),
 	OPT_STRING('p', "parent", &parent_pattern, "regex",
 		   "regex filter to identify parent, see: '--sort parent'"),
 	OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
 		    "Only display entries with parent-match"),
 	OPT_CALLBACK_DEFAULT('g', "call-graph", &report, "output_type,min_percent[,print_limit],call_order",
 		     "Display callchains using output_type (graph, flat, fractal, or none) , min percent threshold, optional print limit and callchain order. "
 		     "Default: fractal,0.5,callee", &parse_callchain_opt, callchain_default_opt),
 	OPT_BOOLEAN('G', "inverted", &report.inverted_callchain,
 		    "alias for inverted call graph"),
 	OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
 		   "only consider symbols in these dsos"),
 	OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
 		   "only consider symbols in these comms"),
 	OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
 		   "only consider these symbols"),
 	OPT_STRING(0, "symbol-filter", &report.symbol_filter_str, "filter",
 		   "only show symbols that (partially) match with this filter"),
 	OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
 		   "width[,width...]",
 		   "don't try to adjust column width, use these fixed values"),
 	OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
 		   "separator for columns, no spaces will be added between "
 		   "columns '.' is reserved."),
 	OPT_BOOLEAN('U', "hide-unresolved", &report.hide_unresolved,
 		    "Only display entries resolved to a symbol"),
 	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
 		    "Look for files with symbols relative to this directory"),
 	OPT_STRING('C', "cpu", &report.cpu_list, "cpu",
 		   "list of cpus to profile"),
 	OPT_BOOLEAN('I', "show-info", &report.show_full_info,
 		    "Display extended information about perf.data file"),
 	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_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
 		    "Show a column with the sum of periods"),
 	OPT_CALLBACK_NOOPT('b', "branch-stack", &sort__branch_mode, "",
 		    "use branch records for histogram filling", parse_branch_mode),
 	OPT_STRING(0, "objdump", &objdump_path, "path",
 		   "objdump binary to use for disassembly and annotations"),
 	OPT_END()
 	};

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

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

 	if (report.inverted_callchain)
 		callchain_param.order = ORDER_CALLER;

 	if (!report.input_name || !strlen(report.input_name)) {
 		if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
 			report.input_name = "-";
 		else
 			report.input_name = "perf.data";
 	}
 	session = perf_session__new(report.input_name, O_RDONLY,
 				    report.force, false, &report.tool);
 	if (session == NULL)
 		return -ENOMEM;

 	report.session = session;

 	has_br_stack = perf_header__has_feat(&session->header,
 					     HEADER_BRANCH_STACK);

 	if (sort__branch_mode == -1 && has_br_stack)
 		sort__branch_mode = 1;

 	/* sort__branch_mode could be 0 if --no-branch-stack */
 	if (sort__branch_mode == 1) {
 		/*
 		 * if no sort_order is provided, then specify
 		 * branch-mode specific order
 		 */
 		if (sort_order == default_sort_order)
 			sort_order = "comm,dso_from,symbol_from,"
 				     "dso_to,symbol_to";

 	}

 	if (strcmp(report.input_name, "-") != 0)
 		setup_browser(true);
 	else
 		use_browser = 0;

 	/*
 	 * Only in the newt browser we are doing integrated annotation,
 	 * so don't allocate extra space that won't be used in the stdio
 	 * implementation.
 	 */
 	if (use_browser > 0) {
 		symbol_conf.priv_size = sizeof(struct annotation);
 		report.annotate_init  = symbol__annotate_init;
 		/*
  		 * For searching by name on the "Browse map details".
  		 * providing it only in verbose mode not to bloat too
  		 * much struct symbol.
  		 */
 		if (verbose) {
 			/*
 			 * XXX: Need to provide a less kludgy way to ask for
 			 * more space per symbol, the u32 is for the index on
 			 * the ui browser.
 			 * See symbol__browser_index.
 			 */
 			symbol_conf.priv_size += sizeof(u32);
 			symbol_conf.sort_by_name = true;
 		}
 	}

 	if (symbol__init() < 0)
 		goto error;

 	setup_sorting(report_usage, options);

 	if (parent_pattern != default_parent_pattern) {
 		if (sort_dimension__add("parent") < 0)
 			goto error;

 		/*
 		 * Only show the parent fields if we explicitly
 		 * sort that way. If we only use parent machinery
 		 * for filtering, we don't want it.
 		 */
 		if (!strstr(sort_order, "parent"))
 			sort_parent.elide = 1;
 	} else
 		symbol_conf.exclude_other = false;

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

 		report.symbol_filter_str = argv[0];
 	}

 	sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);

 	if (sort__branch_mode == 1) {
 		sort_entry__setup_elide(&sort_dso_from, symbol_conf.dso_from_list, "dso_from", stdout);
 		sort_entry__setup_elide(&sort_dso_to, symbol_conf.dso_to_list, "dso_to", stdout);
 		sort_entry__setup_elide(&sort_sym_from, symbol_conf.sym_from_list, "sym_from", stdout);
 		sort_entry__setup_elide(&sort_sym_to, symbol_conf.sym_to_list, "sym_to", stdout);
 	} else {
 		sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
 		sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
 	}

 	ret = __cmd_report(&report);
 error:
 	perf_session__delete(session);
 	return ret;
 }
	/*
	* builtin-report.c
	*
	* Builtin report 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/annotate.h"
	#include "util/color.h"
	#include <linux/list.h>
	#include "util/cache.h"
	#include <linux/rbtree.h>
	#include "util/symbol.h"
	#include "util/callchain.h"
	#include "util/strlist.h"
	#include "util/values.h"

	#include "perf.h"
	#include "util/debug.h"
	#include "util/evlist.h"
	#include "util/evsel.h"
	#include "util/header.h"
	#include "util/session.h"
	#include "util/tool.h"

	#include "util/parse-options.h"
	#include "util/parse-events.h"

	#include "util/thread.h"
	#include "util/sort.h"
	#include "util/hist.h"

	#include <linux/bitmap.h>

	struct perf_report {
	struct perf_tool tool;
	struct perf_session *session;
	char const *input_name;
	bool force, use_tui, use_gtk, use_stdio;
	bool hide_unresolved;
	bool dont_use_callchains;
	bool show_full_info;
	bool show_threads;
	bool inverted_callchain;
	struct perf_read_values show_threads_values;
	const char *pretty_printing_style;
	symbol_filter_t annotate_init;
	const char *cpu_list;
	const char *symbol_filter_str;
	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
	};

	static int perf_report__add_branch_hist_entry(struct perf_tool *tool,
	struct addr_location *al,
	struct perf_sample *sample,
	struct perf_evsel *evsel,
	struct machine *machine)
	{
	struct perf_report *rep = container_of(tool, struct perf_report, tool);
	struct symbol *parent = NULL;
	int err = 0;
	unsigned i;
	struct hist_entry *he;
	struct branch_info bi, bx;

	if ((sort__has_parent \|\| symbol_conf.use_callchain)
	&& sample->callchain) {
	err = machine__resolve_callchain(machine, evsel, al->thread,
	sample, &parent);
	if (err)
	return err;
	}

	bi = machine__resolve_bstack(machine, al->thread,
	sample->branch_stack);
	if (!bi)
	return -ENOMEM;

	for (i = 0; i < sample->branch_stack->nr; i++) {
	if (rep->hide_unresolved && !(bi[i].from.sym && bi[i].to.sym))
	continue;
	/*
	* The report shows the percentage of total branches captured
	* and not events sampled. Thus we use a pseudo period of 1.
	*/
	he = __hists__add_branch_entry(&evsel->hists, al, parent,
	&bi[i], 1);
	if (he) {
	struct annotation *notes;
	err = -ENOMEM;
	bx = he->branch_info;
	if (bx->from.sym && use_browser > 0) {
	notes = symbol__annotation(bx->from.sym);
	if (!notes->src
	&& symbol__alloc_hist(bx->from.sym) < 0)
	goto out;

	err = symbol__inc_addr_samples(bx->from.sym,
	bx->from.map,
	evsel->idx,
	bx->from.al_addr);
	if (err)
	goto out;
	}

	if (bx->to.sym && use_browser > 0) {
	notes = symbol__annotation(bx->to.sym);
	if (!notes->src
	&& symbol__alloc_hist(bx->to.sym) < 0)
	goto out;

	err = symbol__inc_addr_samples(bx->to.sym,
	bx->to.map,
	evsel->idx,
	bx->to.al_addr);
	if (err)
	goto out;
	}
	evsel->hists.stats.total_period += 1;
	hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
	err = 0;
	} else
	return -ENOMEM;
	}
	out:
	return err;
	}

	static int perf_evsel__add_hist_entry(struct perf_evsel *evsel,
	struct addr_location *al,
	struct perf_sample *sample,
	struct machine *machine)
	{
	struct symbol *parent = NULL;
	int err = 0;
	struct hist_entry *he;

	if ((sort__has_parent \|\| symbol_conf.use_callchain) && sample->callchain) {
	err = machine__resolve_callchain(machine, evsel, al->thread,
	sample, &parent);
	if (err)
	return err;
	}

	he = __hists__add_entry(&evsel->hists, al, parent, sample->period);
	if (he == NULL)
	return -ENOMEM;

	if (symbol_conf.use_callchain) {
	err = callchain_append(he->callchain,
	&callchain_cursor,
	sample->period);
	if (err)
	return err;
	}
	/*
	* Only in the newt browser we are doing integrated annotation,
	* so we don't allocated the extra space needed because the stdio
	* code will not use it.
	*/
	if (he->ms.sym != NULL && use_browser > 0) {
	struct annotation *notes = symbol__annotation(he->ms.sym);

	assert(evsel != NULL);

	err = -ENOMEM;
	if (notes->src == NULL && symbol__alloc_hist(he->ms.sym) < 0)
	goto out;

	err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
	}

	evsel->hists.stats.total_period += sample->period;
	hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
	out:
	return err;
	}


	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_report *rep = container_of(tool, struct perf_report, tool);
	struct addr_location al;

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

	if (al.filtered \|\| (rep->hide_unresolved && al.sym == NULL))
	return 0;

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

	if (sort__branch_mode == 1) {
	if (perf_report__add_branch_hist_entry(tool, &al, sample,
	evsel, machine)) {
	pr_debug("problem adding lbr entry, skipping event\n");
	return -1;
	}
	} else {
	if (al.map != NULL)
	al.map->dso->hit = 1;

	if (perf_evsel__add_hist_entry(evsel, &al, sample, machine)) {
	pr_debug("problem incrementing symbol period, skipping event\n");
	return -1;
	}
	}
	return 0;
	}

	static int process_read_event(struct perf_tool *tool,
	union perf_event *event,
	struct perf_sample *sample __maybe_unused,
	struct perf_evsel *evsel,
	struct machine *machine __maybe_unused)
	{
	struct perf_report *rep = container_of(tool, struct perf_report, tool);

	if (rep->show_threads) {
	const char *name = evsel ? perf_evsel__name(evsel) : "unknown";
	perf_read_values_add_value(&rep->show_threads_values,
	event->read.pid, event->read.tid,
	event->read.id,
	name,
	event->read.value);
	}

	dump_printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid,
	evsel ? perf_evsel__name(evsel) : "FAIL",
	event->read.value);

	return 0;
	}

	/* For pipe mode, sample_type is not currently set */
	static int perf_report__setup_sample_type(struct perf_report *rep)
	{
	struct perf_session *self = rep->session;
	u64 sample_type = perf_evlist__sample_type(self->evlist);

	if (!self->fd_pipe && !(sample_type & PERF_SAMPLE_CALLCHAIN)) {
	if (sort__has_parent) {
	ui__error("Selected --sort parent, but no "
	"callchain data. Did you call "
	"'perf record' without -g?\n");
	return -EINVAL;
	}
	if (symbol_conf.use_callchain) {
	ui__error("Selected -g but no callchain data. Did "
	"you call 'perf record' without -g?\n");
	return -1;
	}
	} else if (!rep->dont_use_callchains &&
	callchain_param.mode != CHAIN_NONE &&
	!symbol_conf.use_callchain) {
	symbol_conf.use_callchain = true;
	if (callchain_register_param(&callchain_param) < 0) {
	ui__error("Can't register callchain params.\n");
	return -EINVAL;
	}
	}

	if (sort__branch_mode == 1) {
	if (!self->fd_pipe &&
	!(sample_type & PERF_SAMPLE_BRANCH_STACK)) {
	ui__error("Selected -b but no branch data. "
	"Did you call perf record without -b?\n");
	return -1;
	}
	}

	return 0;
	}

	extern volatile int session_done;

	static void sig_handler(int sig __maybe_unused)
	{
	session_done = 1;
	}

	static size_t hists__fprintf_nr_sample_events(struct hists *self,
	const char evname, FILE fp)
	{
	size_t ret;
	char unit;
	unsigned long nr_samples = self->stats.nr_events[PERF_RECORD_SAMPLE];
	u64 nr_events = self->stats.total_period;

	nr_samples = convert_unit(nr_samples, &unit);
	ret = fprintf(fp, "# Samples: %lu%c", nr_samples, unit);
	if (evname != NULL)
	ret += fprintf(fp, " of event '%s'", evname);

	ret += fprintf(fp, "\n# Event count (approx.): %" PRIu64, nr_events);
	return ret + fprintf(fp, "\n#\n");
	}

	static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
	struct perf_report *rep,
	const char *help)
	{
	struct perf_evsel *pos;

	list_for_each_entry(pos, &evlist->entries, node) {
	struct hists *hists = &pos->hists;
	const char *evname = perf_evsel__name(pos);

	hists__fprintf_nr_sample_events(hists, evname, stdout);
	hists__fprintf(hists, NULL, false, true, 0, 0, stdout);
	fprintf(stdout, "\n\n");
	}

	if (sort_order == default_sort_order &&
	parent_pattern == default_parent_pattern) {
	fprintf(stdout, "#\n# (%s)\n#\n", help);

	if (rep->show_threads) {
	bool style = !strcmp(rep->pretty_printing_style, "raw");
	perf_read_values_display(stdout, &rep->show_threads_values,
	style);
	perf_read_values_destroy(&rep->show_threads_values);
	}
	}

	return 0;
	}

	static int __cmd_report(struct perf_report *rep)
	{
	int ret = -EINVAL;
	u64 nr_samples;
	struct perf_session *session = rep->session;
	struct perf_evsel *pos;
	struct map *kernel_map;
	struct kmap *kernel_kmap;
	const char *help = "For a higher level overview, try: perf report --sort comm,dso";

	signal(SIGINT, sig_handler);

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

	if (use_browser <= 0)
	perf_session__fprintf_info(session, stdout, rep->show_full_info);

	if (rep->show_threads)
	perf_read_values_init(&rep->show_threads_values);

	ret = perf_report__setup_sample_type(rep);
	if (ret)
	goto out_delete;

	ret = perf_session__process_events(session, &rep->tool);
	if (ret)
	goto out_delete;

	kernel_map = session->host_machine.vmlinux_maps[MAP__FUNCTION];
	kernel_kmap = map__kmap(kernel_map);
	if (kernel_map == NULL \|\|
	(kernel_map->dso->hit &&
	(kernel_kmap->ref_reloc_sym == NULL \|\|
	kernel_kmap->ref_reloc_sym->addr == 0))) {
	const char *desc =
	"As no suitable kallsyms nor vmlinux was found, kernel samples\n"
	"can't be resolved.";

	if (kernel_map) {
	const struct dso *kdso = kernel_map->dso;
	if (!RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION])) {
	desc = "If some relocation was applied (e.g. "
	"kexec) symbols may be misresolved.";
	}
	}

	ui__warning(
	"Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n"
	"Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n"
	"Samples in kernel modules can't be resolved as well.\n\n",
	desc);
	}

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

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

	if (dump_trace) {
	perf_session__fprintf_nr_events(session, stdout);
	goto out_delete;
	}

	nr_samples = 0;
	list_for_each_entry(pos, &session->evlist->entries, node) {
	struct hists *hists = &pos->hists;

	if (pos->idx == 0)
	hists->symbol_filter_str = rep->symbol_filter_str;

	hists__collapse_resort(hists);
	hists__output_resort(hists);
	nr_samples += hists->stats.nr_events[PERF_RECORD_SAMPLE];
	}

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

	if (use_browser > 0) {
	if (use_browser == 1) {
	perf_evlist__tui_browse_hists(session->evlist, help,
	NULL, NULL, 0);
	} else if (use_browser == 2) {
	perf_evlist__gtk_browse_hists(session->evlist, help,
	NULL, NULL, 0);
	}
	} else
	perf_evlist__tty_browse_hists(session->evlist, rep, help);

	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;
	}

	static int
	parse_callchain_opt(const struct option opt, const char arg, int unset)
	{
	struct perf_report rep = (struct perf_report )opt->value;
	char tok, tok2;
	char *endptr;

	/*
	* --no-call-graph
	*/
	if (unset) {
	rep->dont_use_callchains = true;
	return 0;
	}

	symbol_conf.use_callchain = true;

	if (!arg)
	return 0;

	tok = strtok((char *)arg, ",");
	if (!tok)
	return -1;

	/* get the output mode */
	if (!strncmp(tok, "graph", strlen(arg)))
	callchain_param.mode = CHAIN_GRAPH_ABS;

	else if (!strncmp(tok, "flat", strlen(arg)))
	callchain_param.mode = CHAIN_FLAT;

	else if (!strncmp(tok, "fractal", strlen(arg)))
	callchain_param.mode = CHAIN_GRAPH_REL;

	else if (!strncmp(tok, "none", strlen(arg))) {
	callchain_param.mode = CHAIN_NONE;
	symbol_conf.use_callchain = false;

	return 0;
	}

	else
	return -1;

	/* get the min percentage */
	tok = strtok(NULL, ",");
	if (!tok)
	goto setup;

	callchain_param.min_percent = strtod(tok, &endptr);
	if (tok == endptr)
	return -1;

	/* get the print limit */
	tok2 = strtok(NULL, ",");
	if (!tok2)
	goto setup;

	if (tok2[0] != 'c') {
	callchain_param.print_limit = strtoul(tok2, &endptr, 0);
	tok2 = strtok(NULL, ",");
	if (!tok2)
	goto setup;
	}

	/* get the call chain order */
	if (!strcmp(tok2, "caller"))
	callchain_param.order = ORDER_CALLER;
	else if (!strcmp(tok2, "callee"))
	callchain_param.order = ORDER_CALLEE;
	else
	return -1;
	setup:
	if (callchain_register_param(&callchain_param) < 0) {
	fprintf(stderr, "Can't register callchain params\n");
	return -1;
	}
	return 0;
	}

	static int
	parse_branch_mode(const struct option *opt __maybe_unused,
	const char *str __maybe_unused, int unset)
	{
	sort__branch_mode = !unset;
	return 0;
	}

	int cmd_report(int argc, const char *argv, const char prefix __maybe_unused)
	{
	struct perf_session *session;
	struct stat st;
	bool has_br_stack = false;
	int ret = -1;
	char callchain_default_opt[] = "fractal,0.5,callee";
	const char * const report_usage[] = {
	"perf report [<options>]",
	NULL
	};
	struct perf_report report = {
	.tool = {
	.sample = process_sample_event,
	.mmap = perf_event__process_mmap,
	.comm = perf_event__process_comm,
	.exit = perf_event__process_task,
	.fork = perf_event__process_task,
	.lost = perf_event__process_lost,
	.read = process_read_event,
	.attr = perf_event__process_attr,
	.event_type = perf_event__process_event_type,
	.tracing_data = perf_event__process_tracing_data,
	.build_id = perf_event__process_build_id,
	.ordered_samples = true,
	.ordering_requires_timestamps = true,
	},
	.pretty_printing_style = "normal",
	};
	const struct option options[] = {
	OPT_STRING('i', "input", &report.input_name, "file",
	"input file name"),
	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_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
	"file", "vmlinux pathname"),
	OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
	"file", "kallsyms pathname"),
	OPT_BOOLEAN('f', "force", &report.force, "don't complain, do it"),
	OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
	"load module symbols - WARNING: use only with -k and LIVE kernel"),
	OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
	"Show a column with the number of samples"),
	OPT_BOOLEAN('T', "threads", &report.show_threads,
	"Show per-thread event counters"),
	OPT_STRING(0, "pretty", &report.pretty_printing_style, "key",
	"pretty printing style key: normal raw"),
	OPT_BOOLEAN(0, "tui", &report.use_tui, "Use the TUI interface"),
	OPT_BOOLEAN(0, "gtk", &report.use_gtk, "Use the GTK2 interface"),
	OPT_BOOLEAN(0, "stdio", &report.use_stdio,
	"Use the stdio interface"),
	OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
	"sort by key(s): pid, comm, dso, symbol, parent, dso_to,"
	" dso_from, symbol_to, symbol_from, mispredict"),
	OPT_BOOLEAN(0, "showcpuutilization", &symbol_conf.show_cpu_utilization,
	"Show sample percentage for different cpu modes"),
	OPT_STRING('p', "parent", &parent_pattern, "regex",
	"regex filter to identify parent, see: '--sort parent'"),
	OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
	"Only display entries with parent-match"),
	OPT_CALLBACK_DEFAULT('g', "call-graph", &report, "output_type,min_percent[,print_limit],call_order",
	"Display callchains using output_type (graph, flat, fractal, or none) , min percent threshold, optional print limit and callchain order. "
	"Default: fractal,0.5,callee", &parse_callchain_opt, callchain_default_opt),
	OPT_BOOLEAN('G', "inverted", &report.inverted_callchain,
	"alias for inverted call graph"),
	OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
	"only consider symbols in these dsos"),
	OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
	"only consider symbols in these comms"),
	OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
	"only consider these symbols"),
	OPT_STRING(0, "symbol-filter", &report.symbol_filter_str, "filter",
	"only show symbols that (partially) match with this filter"),
	OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
	"width[,width...]",
	"don't try to adjust column width, use these fixed values"),
	OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
	"separator for columns, no spaces will be added between "
	"columns '.' is reserved."),
	OPT_BOOLEAN('U', "hide-unresolved", &report.hide_unresolved,
	"Only display entries resolved to a symbol"),
	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
	"Look for files with symbols relative to this directory"),
	OPT_STRING('C', "cpu", &report.cpu_list, "cpu",
	"list of cpus to profile"),
	OPT_BOOLEAN('I', "show-info", &report.show_full_info,
	"Display extended information about perf.data file"),
	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_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
	"Show a column with the sum of periods"),
	OPT_CALLBACK_NOOPT('b', "branch-stack", &sort__branch_mode, "",
	"use branch records for histogram filling", parse_branch_mode),
	OPT_STRING(0, "objdump", &objdump_path, "path",
	"objdump binary to use for disassembly and annotations"),
	OPT_END()
	};

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

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

	if (report.inverted_callchain)
	callchain_param.order = ORDER_CALLER;

	if (!report.input_name \|\| !strlen(report.input_name)) {
	if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
	report.input_name = "-";
	else
	report.input_name = "perf.data";
	}
	session = perf_session__new(report.input_name, O_RDONLY,
	report.force, false, &report.tool);
	if (session == NULL)
	return -ENOMEM;

	report.session = session;

	has_br_stack = perf_header__has_feat(&session->header,
	HEADER_BRANCH_STACK);

	if (sort__branch_mode == -1 && has_br_stack)
	sort__branch_mode = 1;

	/* sort__branch_mode could be 0 if --no-branch-stack */
	if (sort__branch_mode == 1) {
	/*
	* if no sort_order is provided, then specify
	* branch-mode specific order
	*/
	if (sort_order == default_sort_order)
	sort_order = "comm,dso_from,symbol_from,"
	"dso_to,symbol_to";

	}

	if (strcmp(report.input_name, "-") != 0)
	setup_browser(true);
	else
	use_browser = 0;

	/*
	* Only in the newt browser we are doing integrated annotation,
	* so don't allocate extra space that won't be used in the stdio
	* implementation.
	*/
	if (use_browser > 0) {
	symbol_conf.priv_size = sizeof(struct annotation);
	report.annotate_init = symbol__annotate_init;
	/*
	* For searching by name on the "Browse map details".
	* providing it only in verbose mode not to bloat too
	* much struct symbol.
	*/
	if (verbose) {
	/*
	* XXX: Need to provide a less kludgy way to ask for
	* more space per symbol, the u32 is for the index on
	* the ui browser.
	* See symbol__browser_index.
	*/
	symbol_conf.priv_size += sizeof(u32);
	symbol_conf.sort_by_name = true;
	}
	}

	if (symbol__init() < 0)
	goto error;

	setup_sorting(report_usage, options);

	if (parent_pattern != default_parent_pattern) {
	if (sort_dimension__add("parent") < 0)
	goto error;

	/*
	* Only show the parent fields if we explicitly
	* sort that way. If we only use parent machinery
	* for filtering, we don't want it.
	*/
	if (!strstr(sort_order, "parent"))
	sort_parent.elide = 1;
	} else
	symbol_conf.exclude_other = false;

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

	report.symbol_filter_str = argv[0];
	}

	sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);

	if (sort__branch_mode == 1) {
	sort_entry__setup_elide(&sort_dso_from, symbol_conf.dso_from_list, "dso_from", stdout);
	sort_entry__setup_elide(&sort_dso_to, symbol_conf.dso_to_list, "dso_to", stdout);
	sort_entry__setup_elide(&sort_sym_from, symbol_conf.sym_from_list, "sym_from", stdout);
	sort_entry__setup_elide(&sort_sym_to, symbol_conf.sym_to_list, "sym_to", stdout);
	} else {
	sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
	sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
	}

	ret = __cmd_report(&report);
	error:
	perf_session__delete(session);
	return ret;
	}