builtin-report.c

	init_rem_hits();

	fprintf(fp, "# Samples: %Ld\n", (u64)total_samples);
	fprintf(fp, "#\n");

	fprintf(fp, "# Overhead");
	if (show_nr_samples) {
		if (field_sep)
			fprintf(fp, "%cSamples", *field_sep);
		else
			fputs("  Samples  ", fp);
	}
	list_for_each_entry(se, &hist_entry__sort_list, list) {
		if (se->elide)
			continue;
		if (field_sep) {
			fprintf(fp, "%c%s", *field_sep, se->header);
			continue;
		}
		width = strlen(se->header);
		if (se->width) {
			if (col_width_list_str) {
				if (col_width) {
					*se->width = atoi(col_width);
					col_width = strchr(col_width, ',');
					if (col_width)
						++col_width;
				}
			}
			width = *se->width = max(*se->width, width);
		}
		fprintf(fp, "  %*s", width, se->header);
	}
	fprintf(fp, "\n");

	if (field_sep)
		goto print_entries;

	fprintf(fp, "# ........");
	if (show_nr_samples)
		fprintf(fp, " ..........");
	list_for_each_entry(se, &hist_entry__sort_list, list) {
		unsigned int i;

		if (se->elide)
			continue;

		fprintf(fp, "  ");
		if (se->width)
			width = *se->width;
		else
			width = strlen(se->header);
		for (i = 0; i < width; i++)
			fprintf(fp, ".");
	}
	fprintf(fp, "\n");

	fprintf(fp, "#\n");

print_entries:
	for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
		pos = rb_entry(nd, struct hist_entry, rb_node);
		ret += hist_entry__fprintf(fp, pos, total_samples);
	}

	if (sort_order == default_sort_order &&
			parent_pattern == default_parent_pattern) {
		fprintf(fp, "#\n");
		fprintf(fp, "# (For a higher level overview, try: perf report --sort comm,dso)\n");
		fprintf(fp, "#\n");
	}
	fprintf(fp, "\n");

	free(rem_sq_bracket);

	if (show_threads)
		perf_read_values_display(fp, &show_threads_values,
					 raw_printing_style);

	return ret;
}

static unsigned long total = 0,
		     total_mmap = 0,
		     total_comm = 0,
		     total_fork = 0,
		     total_unknown = 0,
		     total_lost = 0;

static int validate_chain(struct ip_callchain *chain, event_t *event)
{
	unsigned int chain_size;

	chain_size = event->header.size;
	chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;

	if (chain->nr*sizeof(u64) > chain_size)
		return -1;

	return 0;
}

static int
process_sample_event(event_t *event, unsigned long offset, unsigned long head)
{
	char level;
	int show = 0;
	struct dso *dso = NULL;
	struct thread *thread;
	u64 ip = event->ip.ip;
	u64 period = 1;
	struct map *map = NULL;
	void *more_data = event->ip.__more_data;
	struct ip_callchain *chain = NULL;
	int cpumode;

	thread = threads__findnew(event->ip.pid, &threads, &last_match);

	if (sample_type & PERF_SAMPLE_PERIOD) {
		period = *(u64 *)more_data;
		more_data += sizeof(u64);
	}

	dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->header.misc,
		event->ip.pid, event->ip.tid,
		(void *)(long)ip,
		(long long)period);

	if (sample_type & PERF_SAMPLE_CALLCHAIN) {
		unsigned int i;

		chain = (void *)more_data;

		dump_printf("... chain: nr:%Lu\n", chain->nr);

		if (validate_chain(chain, event) < 0) {
			eprintf("call-chain problem with event, skipping it.\n");
			return 0;
		}

		if (dump_trace) {
			for (i = 0; i < chain->nr; i++)
				dump_printf("..... %2d: %016Lx\n", i, chain->ips[i]);
		}
	}

	dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);

	if (thread == NULL) {
		eprintf("problem processing %d event, skipping it.\n",
			event->header.type);
		return -1;
	}

	if (comm_list && !strlist__has_entry(comm_list, thread->comm))
		return 0;

	cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;

	if (cpumode == PERF_RECORD_MISC_KERNEL) {
		show = SHOW_KERNEL;
		level = 'k';

		dso = kernel_dso;

		dump_printf(" ...... dso: %s\n", dso->name);

	} else if (cpumode == PERF_RECORD_MISC_USER) {

		show = SHOW_USER;
		level = '.';

	} else {
		show = SHOW_HV;
		level = 'H';

		dso = hypervisor_dso;

		dump_printf(" ...... dso: [hypervisor]\n");
	}

	if (show & show_mask) {
		struct symbol *sym = resolve_symbol(thread, &map, &dso, &ip);

		if (dso_list && (!dso || !dso->name ||
				 !strlist__has_entry(dso_list, dso->name)))
			return 0;

		if (sym_list && (!sym || !strlist__has_entry(sym_list, sym->name)))
			return 0;

		if (hist_entry__add(thread, map, dso, sym, ip, chain, level, period)) {
			eprintf("problem incrementing symbol count, skipping event\n");
			return -1;
		}
	}
	total += period;

	return 0;
}

static int
process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
{
	struct thread *thread;
	struct map *map = map__new(&event->mmap, cwd, cwdlen);

	thread = threads__findnew(event->mmap.pid, &threads, &last_match);

	dump_printf("%p [%p]: PERF_RECORD_MMAP %d/%d: [%p(%p) @ %p]: %s\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->mmap.pid,
		event->mmap.tid,
		(void *)(long)event->mmap.start,
		(void *)(long)event->mmap.len,
		(void *)(long)event->mmap.pgoff,
		event->mmap.filename);

	if (thread == NULL || map == NULL) {
		dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
		return 0;
	}

	thread__insert_map(thread, map);
	total_mmap++;

	return 0;
}

static int
process_comm_event(event_t *event, unsigned long offset, unsigned long head)
{
	struct thread *thread;

	thread = threads__findnew(event->comm.pid, &threads, &last_match);

	dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->comm.comm, event->comm.pid);

	if (thread == NULL ||
	    thread__set_comm_adjust(thread, event->comm.comm)) {
		dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
		return -1;
	}
	total_comm++;

	return 0;
}

static int
process_task_event(event_t *event, unsigned long offset, unsigned long head)
{
	struct thread *thread;
	struct thread *parent;

	thread = threads__findnew(event->fork.pid, &threads, &last_match);
	parent = threads__findnew(event->fork.ppid, &threads, &last_match);

	dump_printf("%p [%p]: PERF_RECORD_%s: (%d:%d):(%d:%d)\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->header.type == PERF_RECORD_FORK ? "FORK" : "EXIT",
		event->fork.pid, event->fork.tid,
		event->fork.ppid, event->fork.ptid);

	/*
	 * A thread clone will have the same PID for both
	 * parent and child.
	 */
	if (thread == parent)
		return 0;

	if (event->header.type == PERF_RECORD_EXIT)
		return 0;

	if (!thread || !parent || thread__fork(thread, parent)) {
		dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
		return -1;
	}
	total_fork++;

	return 0;
}

static int
process_lost_event(event_t *event, unsigned long offset, unsigned long head)
{
	dump_printf("%p [%p]: PERF_RECORD_LOST: id:%Ld: lost:%Ld\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->lost.id,
		event->lost.lost);

	total_lost += event->lost.lost;

	return 0;
}

static int
process_read_event(event_t *event, unsigned long offset, unsigned long head)
{
	struct perf_event_attr *attr;

	attr = perf_header__find_attr(event->read.id, header);

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

	dump_printf("%p [%p]: PERF_RECORD_READ: %d %d %s %Lu\n",
			(void *)(offset + head),
			(void *)(long)(event->header.size),
			event->read.pid,
			event->read.tid,
			attr ? __event_name(attr->type, attr->config)
			     : "FAIL",
			event->read.value);

	return 0;
}

static int
process_event(event_t *event, unsigned long offset, unsigned long head)
{
	trace_event(event);

	switch (event->header.type) {
	case PERF_RECORD_SAMPLE:
		return process_sample_event(event, offset, head);

	case PERF_RECORD_MMAP:
		return process_mmap_event(event, offset, head);

	case PERF_RECORD_COMM:
		return process_comm_event(event, offset, head);

	case PERF_RECORD_FORK:
	case PERF_RECORD_EXIT:
		return process_task_event(event, offset, head);

	case PERF_RECORD_LOST:
		return process_lost_event(event, offset, head);

	case PERF_RECORD_READ:
		return process_read_event(event, offset, head);

	/*
	 * We dont process them right now but they are fine:
	 */

	case PERF_RECORD_THROTTLE:
	case PERF_RECORD_UNTHROTTLE:
		return 0;

	default:
		return -1;
	}

	return 0;
}

static int __cmd_report(void)
{
	int ret, rc = EXIT_FAILURE;
	unsigned long offset = 0;
	unsigned long head, shift;
	struct stat input_stat;
	struct thread *idle;
	event_t *event;
	uint32_t size;
	char *buf;

	idle = register_idle_thread(&threads, &last_match);
	thread__comm_adjust(idle);

	if (show_threads)
		perf_read_values_init(&show_threads_values);

	input = open(input_name, O_RDONLY);
	if (input < 0) {
		fprintf(stderr, " failed to open file: %s", input_name);
		if (!strcmp(input_name, "perf.data"))
			fprintf(stderr, "  (try 'perf record' first)");
		fprintf(stderr, "\n");
		exit(-1);
	}

	ret = fstat(input, &input_stat);
	if (ret < 0) {
		perror("failed to stat file");
		exit(-1);
	}

	if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
		fprintf(stderr, "file: %s not owned by current user or root\n", input_name);
		exit(-1);
	}

	if (!input_stat.st_size) {
		fprintf(stderr, "zero-sized file, nothing to do!\n");
		exit(0);
	}

	header = perf_header__read(input);
	head = header->data_offset;

	sample_type = perf_header__sample_type(header);

	if (!(sample_type & PERF_SAMPLE_CALLCHAIN)) {
		if (sort__has_parent) {
			fprintf(stderr, "selected --sort parent, but no"
					" callchain data. Did you call"
					" perf record without -g?\n");
			exit(-1);
		}
		if (callchain) {
			fprintf(stderr, "selected -g but no callchain data."
					" Did you call perf record without"
					" -g?\n");
			exit(-1);
		}
	} else if (callchain_param.mode != CHAIN_NONE && !callchain) {
			callchain = 1;
			if (register_callchain_param(&callchain_param) < 0) {
				fprintf(stderr, "Can't register callchain"
						" params\n");
				exit(-1);
			}
	}

	if (load_kernel() < 0) {
		perror("failed to load kernel symbols");
		return EXIT_FAILURE;
	}

	if (!full_paths) {
		if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
			perror("failed to get the current directory");
			return EXIT_FAILURE;
		}
		cwdlen = strlen(cwd);
	} else {
		cwd = NULL;
		cwdlen = 0;
	}

	shift = page_size * (head / page_size);
	offset += shift;
	head -= shift;

remap:
	buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
			   MAP_SHARED, input, offset);
	if (buf == MAP_FAILED) {
		perror("failed to mmap file");
		exit(-1);
	}

more:
	event = (event_t *)(buf + head);

	size = event->header.size;
	if (!size)
		size = 8;

	if (head + event->header.size >= page_size * mmap_window) {
		int munmap_ret;

		shift = page_size * (head / page_size);

		munmap_ret = munmap(buf, page_size * mmap_window);
		assert(munmap_ret == 0);

		offset += shift;
		head -= shift;
		goto remap;
	}

	size = event->header.size;

	dump_printf("\n%p [%p]: event: %d\n",
			(void *)(offset + head),
			(void *)(long)event->header.size,
			event->header.type);

	if (!size || process_event(event, offset, head) < 0) {

		dump_printf("%p [%p]: skipping unknown header type: %d\n",
			(void *)(offset + head),
			(void *)(long)(event->header.size),
			event->header.type);

		total_unknown++;

		/*
		 * assume we lost track of the stream, check alignment, and
		 * increment a single u64 in the hope to catch on again 'soon'.
		 */

		if (unlikely(head & 7))
			head &= ~7ULL;

		size = 8;
	}

	head += size;

	if (offset + head >= header->data_offset + header->data_size)
		goto done;

	if (offset + head < (unsigned long)input_stat.st_size)
		goto more;

done:
	rc = EXIT_SUCCESS;
	close(input);

	dump_printf("      IP events: %10ld\n", total);
	dump_printf("    mmap events: %10ld\n", total_mmap);
	dump_printf("    comm events: %10ld\n", total_comm);
	dump_printf("    fork events: %10ld\n", total_fork);
	dump_printf("    lost events: %10ld\n", total_lost);
	dump_printf(" unknown events: %10ld\n", total_unknown);

	if (dump_trace)
		return 0;

	if (verbose >= 3)
		threads__fprintf(stdout, &threads);

	if (verbose >= 2)
		dsos__fprintf(stdout);

	collapse__resort();
	output__resort(total);
	output__fprintf(stdout, total);

	if (show_threads)
		perf_read_values_destroy(&show_threads_values);

	return rc;
}

static int
parse_callchain_opt(const struct option *opt __used, const char *arg,
		    int unset __used)
{
	char *tok;
	char *endptr;

	callchain = 1;

	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;
		callchain = 0;

		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;

setup:
	if (register_callchain_param(&callchain_param) < 0) {
		fprintf(stderr, "Can't register callchain params\n");
		return -1;
	}
	return 0;
}

static const char * const report_usage[] = {
	"perf report [<options>] <command>",
	NULL
};

static const struct option options[] = {
	OPT_STRING('i', "input", &input_name, "file",
		    "input file name"),
	OPT_BOOLEAN('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", &vmlinux_name, "file", "vmlinux pathname"),
	OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
	OPT_BOOLEAN('m', "modules", &modules,
		    "load module symbols - WARNING: use only with -k and LIVE kernel"),
	OPT_BOOLEAN('n', "show-nr-samples", &show_nr_samples,
		    "Show a column with the number of samples"),
	OPT_BOOLEAN('T', "threads", &show_threads,
		    "Show per-thread event counters"),
	OPT_STRING(0, "pretty", &pretty_printing_style, "key",
		   "pretty printing style key: normal raw"),
	OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
		   "sort by key(s): pid, comm, dso, symbol, parent"),
	OPT_BOOLEAN('P', "full-paths", &full_paths,
		    "Don't shorten the pathnames taking into account the cwd"),
	OPT_STRING('p', "parent", &parent_pattern, "regex",
		   "regex filter to identify parent, see: '--sort parent'"),
	OPT_BOOLEAN('x', "exclude-other", &exclude_other,
		    "Only display entries with parent-match"),
	OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent",
		     "Display callchains using output_type and min percent threshold. "
		     "Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt),
	OPT_STRING('d', "dsos", &dso_list_str, "dso[,dso...]",
		   "only consider symbols in these dsos"),
	OPT_STRING('C', "comms", &comm_list_str, "comm[,comm...]",
		   "only consider symbols in these comms"),
	OPT_STRING('S', "symbols", &sym_list_str, "symbol[,symbol...]",
		   "only consider these symbols"),
	OPT_STRING('w', "column-widths", &col_width_list_str,
		   "width[,width...]",
		   "don't try to adjust column width, use these fixed values"),
	OPT_STRING('t', "field-separator", &field_sep, "separator",
		   "separator for columns, no spaces will be added between "
		   "columns '.' is reserved."),
	OPT_END()
};

static void setup_sorting(void)
{
	char *tmp, *tok, *str = strdup(sort_order);

	for (tok = strtok_r(str, ", ", &tmp);
			tok; tok = strtok_r(NULL, ", ", &tmp)) {
		if (sort_dimension__add(tok) < 0) {
			error("Unknown --sort key: `%s'", tok);
			usage_with_options(report_usage, options);
		}
	}

	free(str);
}

static void setup_list(struct strlist **list, const char *list_str,
		       struct sort_entry *se, const char *list_name,
		       FILE *fp)
{
	if (list_str) {
		*list = strlist__new(true, list_str);
		if (!*list) {
			fprintf(stderr, "problems parsing %s list\n",
				list_name);
			exit(129);
		}
		if (strlist__nr_entries(*list) == 1) {
			fprintf(fp, "# %s: %s\n", list_name,
				strlist__entry(*list, 0)->s);
			se->elide = true;
		}
	}
}

int cmd_report(int argc, const char **argv, const char *prefix __used)
{
	symbol__init();

	page_size = getpagesize();

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

	setup_sorting();

	if (parent_pattern != default_parent_pattern) {
		sort_dimension__add("parent");
		sort_parent.elide = 1;
	} else
		exclude_other = 0;

	/*
	 * Any (unrecognized) arguments left?
	 */
	if (argc)
		usage_with_options(report_usage, options);

	setup_pager();

	setup_list(&dso_list, dso_list_str, &sort_dso, "dso", stdout);
	setup_list(&comm_list, comm_list_str, &sort_comm, "comm", stdout);
	setup_list(&sym_list, sym_list_str, &sort_sym, "symbol", stdout);

	if (field_sep && *field_sep == '.') {
		fputs("'.' is the only non valid --field-separator argument\n",
		      stderr);
		exit(129);
	}

	return __cmd_report();
}