builtin-report.c

	fprintf(fp, "\n");

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

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

	fprintf(fp, "#\n");

	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);
	}

	return ret;
}


static int __cmd_report(void)
{
	unsigned long offset = 0;
	unsigned long head = 0;
	struct stat stat;
	char *buf;
	event_t *event;
	int ret, rc = EXIT_FAILURE;
	uint32_t size;
	unsigned long total = 0, total_mmap = 0, total_comm = 0, total_unknown = 0;

	input = open(input_name, O_RDONLY);
	if (input < 0) {
		perror("failed to open file");
		exit(-1);
	}

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

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

	if (load_kernel() < 0) {
		perror("failed to open kallsyms");
		return EXIT_FAILURE;
	}

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) {
		unsigned long shift = page_size * (head / page_size);
		int ret;

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

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

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

	if (event->header.misc & PERF_EVENT_MISC_OVERFLOW) {
		char level;
		int show = 0;
		struct dso *dso = NULL;
		struct thread *thread = threads__findnew(event->ip.pid);
		uint64_t ip = event->ip.ip;
		struct map *map = NULL;

		if (dump_trace) {
			fprintf(stderr, "%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
				(void *)(offset + head),
				(void *)(long)(event->header.size),
				event->header.misc,
				event->ip.pid,
				(void *)(long)ip);
		}

		if (thread == NULL) {
			fprintf(stderr, "problem processing %d event, skipping it.\n",
				event->header.type);
			goto broken_event;
		}

		if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
			show = SHOW_KERNEL;
			level = 'k';

			dso = kernel_dso;

		} else if (event->header.misc & PERF_EVENT_MISC_USER) {

			show = SHOW_USER;
			level = '.';

			map = thread__find_map(thread, ip);
			if (map != NULL) {
				dso = map->dso;
				ip -= map->start + map->pgoff;
			}

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

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

			if (hist_entry__add(thread, map, dso, sym, ip, level)) {
				fprintf(stderr,
		"problem incrementing symbol count, skipping event\n");
				goto broken_event;
			}
		}
		total++;
	} else switch (event->header.type) {
	case PERF_EVENT_MMAP: {
		struct thread *thread = threads__findnew(event->mmap.pid);
		struct map *map = map__new(&event->mmap);

		if (dump_trace) {
			fprintf(stderr, "%p [%p]: PERF_EVENT_MMAP: [%p(%p) @ %p]: %s\n",
				(void *)(offset + head),
				(void *)(long)(event->header.size),
				(void *)(long)event->mmap.start,
				(void *)(long)event->mmap.len,
				(void *)(long)event->mmap.pgoff,
				event->mmap.filename);
		}
		if (thread == NULL || map == NULL) {
			fprintf(stderr, "problem processing PERF_EVENT_MMAP, skipping event.\n");
			goto broken_event;
		}
		thread__insert_map(thread, map);
		total_mmap++;
		break;
	}
	case PERF_EVENT_COMM: {
		struct thread *thread = threads__findnew(event->comm.pid);

		if (dump_trace) {
			fprintf(stderr, "%p [%p]: PERF_EVENT_COMM: %s:%d\n",
				(void *)(offset + head),
				(void *)(long)(event->header.size),
				event->comm.comm, event->comm.pid);
		}
		if (thread == NULL ||
		    thread__set_comm(thread, event->comm.comm)) {
			fprintf(stderr, "problem processing PERF_EVENT_COMM, skipping event.\n");
			goto broken_event;
		}
		total_comm++;
		break;
	}
	default: {
broken_event:
		if (dump_trace)
			fprintf(stderr, "%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 < stat.st_size)
		goto more;

	rc = EXIT_SUCCESS;
	close(input);

	if (dump_trace) {
		fprintf(stderr, "      IP events: %10ld\n", total);
		fprintf(stderr, "    mmap events: %10ld\n", total_mmap);
		fprintf(stderr, "    comm events: %10ld\n", total_comm);
		fprintf(stderr, " unknown events: %10ld\n", total_unknown);

		return 0;
	}

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

	output__resort();
	output__fprintf(stdout, total);

	return rc;
}

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, "file", "vmlinux pathname"),
	OPT_STRING('s', "sort", &sort_order, "foo", "bar"),
	OPT_END()
};

int cmd_report(int argc, const char **argv, const char *prefix)
{
	elf_version(EV_CURRENT);

	page_size = getpagesize();

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

	setup_sorting();

	setup_pager();

	return __cmd_report();
}