[mirror_ubuntu-artful-kernel.git] / tools / perf / util / annotate.c

/*
 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
 *
 * Parts came from builtin-annotate.c, see those files for further
 * copyright notes.
 *
 * Released under the GPL v2. (and only v2, not any later version)
 */

#include "util.h"
#include "build-id.h"
#include "color.h"
#include "cache.h"
#include "symbol.h"
#include "debug.h"
#include "annotate.h"
#include <pthread.h>

const char 	*disassembler_style;

int symbol__annotate_init(struct map *map __used, struct symbol *sym)
{
	struct annotation *notes = symbol__annotation(sym);
	pthread_mutex_init(&notes->lock, NULL);
	return 0;
}

int symbol__alloc_hist(struct symbol *sym)
{
	struct annotation *notes = symbol__annotation(sym);
	const size_t size = sym->end - sym->start + 1;
	size_t sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64));

	notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist);
	if (notes->src == NULL)
		return -1;
	notes->src->sizeof_sym_hist = sizeof_sym_hist;
	notes->src->nr_histograms   = symbol_conf.nr_events;
	INIT_LIST_HEAD(&notes->src->source);
	return 0;
}

void symbol__annotate_zero_histograms(struct symbol *sym)
{
	struct annotation *notes = symbol__annotation(sym);

	pthread_mutex_lock(&notes->lock);
	if (notes->src != NULL)
		memset(notes->src->histograms, 0,
		       notes->src->nr_histograms * notes->src->sizeof_sym_hist);
	pthread_mutex_unlock(&notes->lock);
}

int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
			     int evidx, u64 addr)
{
	unsigned offset;
	struct annotation *notes;
	struct sym_hist *h;

	notes = symbol__annotation(sym);
	if (notes->src == NULL)
		return -ENOMEM;

	pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));

	if (addr < sym->start || addr > sym->end)
		return -ERANGE;

	offset = addr - sym->start;
	h = annotation__histogram(notes, evidx);
	h->sum++;
	h->addr[offset]++;

	pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
		  ", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
		  addr, addr - sym->start, evidx, h->addr[offset]);
	return 0;
}

static struct objdump_line *objdump_line__new(s64 offset, char *line, size_t privsize)
{
	struct objdump_line *self = malloc(sizeof(*self) + privsize);

	if (self != NULL) {
		self->offset = offset;
		self->line = line;
	}

	return self;
}

void objdump_line__free(struct objdump_line *self)
{
	free(self->line);
	free(self);
}

static void objdump__add_line(struct list_head *head, struct objdump_line *line)
{
	list_add_tail(&line->node, head);
}

struct objdump_line *objdump__get_next_ip_line(struct list_head *head,
					       struct objdump_line *pos)
{
	list_for_each_entry_continue(pos, head, node)
		if (pos->offset >= 0)
			return pos;

	return NULL;
}

static int objdump_line__print(struct objdump_line *oline, struct symbol *sym,
			       int evidx, u64 len, int min_pcnt,
			       int printed, int max_lines,
			       struct objdump_line *queue)
{
	static const char *prev_line;
	static const char *prev_color;

	if (oline->offset != -1) {
		const char *path = NULL;
		unsigned int hits = 0;
		double percent = 0.0;
		const char *color;
		struct annotation *notes = symbol__annotation(sym);
		struct source_line *src_line = notes->src->lines;
		struct sym_hist *h = annotation__histogram(notes, evidx);
		s64 offset = oline->offset;
		struct objdump_line *next;

		next = objdump__get_next_ip_line(&notes->src->source, oline);

		while (offset < (s64)len &&
		       (next == NULL || offset < next->offset)) {
			if (src_line) {
				if (path == NULL)
					path = src_line[offset].path;
				percent += src_line[offset].percent;
			} else
				hits += h->addr[offset];

			++offset;
		}

		if (src_line == NULL && h->sum)
			percent = 100.0 * hits / h->sum;

		if (percent < min_pcnt)
			return -1;

		if (max_lines && printed >= max_lines)
			return 1;

		if (queue != NULL) {
			list_for_each_entry_from(queue, &notes->src->source, node) {
				if (queue == oline)
					break;
				objdump_line__print(queue, sym, evidx, len,
						    0, 0, 1, NULL);
			}
		}

		color = get_percent_color(percent);

		/*
		 * Also color the filename and line if needed, with
		 * the same color than the percentage. Don't print it
		 * twice for close colored addr with the same filename:line
		 */
		if (path) {
			if (!prev_line || strcmp(prev_line, path)
				       || color != prev_color) {
				color_fprintf(stdout, color, " %s", path);
				prev_line = path;
				prev_color = color;
			}
		}

		color_fprintf(stdout, color, " %7.2f", percent);
		printf(" :	");
		color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", oline->line);
	} else if (max_lines && printed >= max_lines)
		return 1;
	else {
		if (queue)
			return -1;

		if (!*oline->line)
			printf("         :\n");
		else
			printf("         :	%s\n", oline->line);
	}

	return 0;
}

static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
				      FILE *file, size_t privsize)
{
	struct annotation *notes = symbol__annotation(sym);
	struct objdump_line *objdump_line;
	char *line = NULL, *tmp, *tmp2, *c;
	size_t line_len;
	s64 line_ip, offset = -1;

	if (getline(&line, &line_len, file) < 0)
		return -1;

	if (!line)
		return -1;

	while (line_len != 0 && isspace(line[line_len - 1]))
		line[--line_len] = '\0';

	c = strchr(line, '\n');
	if (c)
		*c = 0;

	line_ip = -1;

	/*
	 * Strip leading spaces:
	 */
	tmp = line;
	while (*tmp) {
		if (*tmp != ' ')
			break;
		tmp++;
	}

	if (*tmp) {
		/*
		 * Parse hexa addresses followed by ':'
		 */
		line_ip = strtoull(tmp, &tmp2, 16);
		if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0')
			line_ip = -1;
	}

	if (line_ip != -1) {
		u64 start = map__rip_2objdump(map, sym->start),
		    end = map__rip_2objdump(map, sym->end);

		offset = line_ip - start;
		if (offset < 0 || (u64)line_ip > end)
			offset = -1;
	}

	objdump_line = objdump_line__new(offset, line, privsize);
	if (objdump_line == NULL) {
		free(line);
		return -1;
	}
	objdump__add_line(&notes->src->source, objdump_line);

	return 0;
}

int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
{
	struct dso *dso = map->dso;
	char *filename = dso__build_id_filename(dso, NULL, 0);
	bool free_filename = true;
	char command[PATH_MAX * 2];
	FILE *file;
	int err = 0;
	char symfs_filename[PATH_MAX];

	if (filename) {
		snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
			 symbol_conf.symfs, filename);
	}

	if (filename == NULL) {
		if (dso->has_build_id) {
			pr_err("Can't annotate %s: not enough memory\n",
			       sym->name);
			return -ENOMEM;
		}
		goto fallback;
	} else if (readlink(symfs_filename, command, sizeof(command)) < 0 ||
		   strstr(command, "[kernel.kallsyms]") ||
		   access(symfs_filename, R_OK)) {
		free(filename);
fallback:
		/*
		 * If we don't have build-ids or the build-id file isn't in the
		 * cache, or is just a kallsyms file, well, lets hope that this
		 * DSO is the same as when 'perf record' ran.
		 */
		filename = dso->long_name;
		snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
			 symbol_conf.symfs, filename);
		free_filename = false;
	}

	if (dso->symtab_type == SYMTAB__KALLSYMS) {
		char bf[BUILD_ID_SIZE * 2 + 16] = " with build id ";
		char *build_id_msg = NULL;

		if (dso->annotate_warned)
			goto out_free_filename;

		if (dso->has_build_id) {
			build_id__sprintf(dso->build_id,
					  sizeof(dso->build_id), bf + 15);
			build_id_msg = bf;
		}
		err = -ENOENT;
		dso->annotate_warned = 1;
		pr_err("Can't annotate %s:\n\n"
		       "No vmlinux file%s\nwas found in the path.\n\n"
		       "Please use:\n\n"
		       "  perf buildid-cache -av vmlinux\n\n"
		       "or:\n\n"
		       "  --vmlinux vmlinux\n",
		       sym->name, build_id_msg ?: "");
		goto out_free_filename;
	}

	pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
		 filename, sym->name, map->unmap_ip(map, sym->start),
		 map->unmap_ip(map, sym->end));

	pr_debug("annotating [%p] %30s : [%p] %30s\n",
		 dso, dso->long_name, sym, sym->name);

	snprintf(command, sizeof(command),
		 "objdump %s%s --start-address=0x%016" PRIx64
		 " --stop-address=0x%016" PRIx64
		 " -d %s %s -C %s|grep -v %s|expand",
		 disassembler_style ? "-M " : "",
		 disassembler_style ? disassembler_style : "",
		 map__rip_2objdump(map, sym->start),
		 map__rip_2objdump(map, sym->end+1),
		 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
		 symbol_conf.annotate_src ? "-S" : "",
		 symfs_filename, filename);

	pr_debug("Executing: %s\n", command);

	file = popen(command, "r");
	if (!file)
		goto out_free_filename;

	while (!feof(file))
		if (symbol__parse_objdump_line(sym, map, file, privsize) < 0)
			break;

	pclose(file);
out_free_filename:
	if (free_filename)
		free(filename);
	return err;
}

static void insert_source_line(struct rb_root *root, struct source_line *src_line)
{
	struct source_line *iter;
	struct rb_node **p = &root->rb_node;
	struct rb_node *parent = NULL;

	while (*p != NULL) {
		parent = *p;
		iter = rb_entry(parent, struct source_line, node);

		if (src_line->percent > iter->percent)
			p = &(*p)->rb_left;
		else
			p = &(*p)->rb_right;
	}

	rb_link_node(&src_line->node, parent, p);
	rb_insert_color(&src_line->node, root);
}

static void symbol__free_source_line(struct symbol *sym, int len)
{
	struct annotation *notes = symbol__annotation(sym);
	struct source_line *src_line = notes->src->lines;
	int i;

	for (i = 0; i < len; i++)
		free(src_line[i].path);

	free(src_line);
	notes->src->lines = NULL;
}

/* Get the filename:line for the colored entries */
static int symbol__get_source_line(struct symbol *sym, struct map *map,
				   int evidx, struct rb_root *root, int len,
				   const char *filename)
{
	u64 start;
	int i;
	char cmd[PATH_MAX * 2];
	struct source_line *src_line;
	struct annotation *notes = symbol__annotation(sym);
	struct sym_hist *h = annotation__histogram(notes, evidx);

	if (!h->sum)
		return 0;

	src_line = notes->src->lines = calloc(len, sizeof(struct source_line));
	if (!notes->src->lines)
		return -1;

	start = map__rip_2objdump(map, sym->start);

	for (i = 0; i < len; i++) {
		char *path = NULL;
		size_t line_len;
		u64 offset;
		FILE *fp;

		src_line[i].percent = 100.0 * h->addr[i] / h->sum;
		if (src_line[i].percent <= 0.5)
			continue;

		offset = start + i;
		sprintf(cmd, "addr2line -e %s %016" PRIx64, filename, offset);
		fp = popen(cmd, "r");
		if (!fp)
			continue;

		if (getline(&path, &line_len, fp) < 0 || !line_len)
			goto next;

		src_line[i].path = malloc(sizeof(char) * line_len + 1);
		if (!src_line[i].path)
			goto next;

		strcpy(src_line[i].path, path);
		insert_source_line(root, &src_line[i]);

	next:
		pclose(fp);
	}

	return 0;
}

static void print_summary(struct rb_root *root, const char *filename)
{
	struct source_line *src_line;
	struct rb_node *node;

	printf("\nSorted summary for file %s\n", filename);
	printf("----------------------------------------------\n\n");

	if (RB_EMPTY_ROOT(root)) {
		printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
		return;
	}

	node = rb_first(root);
	while (node) {
		double percent;
		const char *color;
		char *path;

		src_line = rb_entry(node, struct source_line, node);
		percent = src_line->percent;
		color = get_percent_color(percent);
		path = src_line->path;

		color_fprintf(stdout, color, " %7.2f %s", percent, path);
		node = rb_next(node);
	}
}

static void symbol__annotate_hits(struct symbol *sym, int evidx)
{
	struct annotation *notes = symbol__annotation(sym);
	struct sym_hist *h = annotation__histogram(notes, evidx);
	u64 len = sym->end - sym->start, offset;

	for (offset = 0; offset < len; ++offset)
		if (h->addr[offset] != 0)
			printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
			       sym->start + offset, h->addr[offset]);
	printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
}

int symbol__annotate_printf(struct symbol *sym, struct map *map, int evidx,
			    bool full_paths, int min_pcnt, int max_lines,
			    int context)
{
	struct dso *dso = map->dso;
	const char *filename = dso->long_name, *d_filename;
	struct annotation *notes = symbol__annotation(sym);
	struct objdump_line *pos, *queue = NULL;
	int printed = 2, queue_len = 0;
	int more = 0;
	u64 len;

	if (full_paths)
		d_filename = filename;
	else
		d_filename = basename(filename);

	len = sym->end - sym->start;

	printf(" Percent |	Source code & Disassembly of %s\n", d_filename);
	printf("------------------------------------------------\n");

	if (verbose)
		symbol__annotate_hits(sym, evidx);

	list_for_each_entry(pos, &notes->src->source, node) {
		if (context && queue == NULL) {
			queue = pos;
			queue_len = 0;
		}

		switch (objdump_line__print(pos, sym, evidx, len, min_pcnt,
					    printed, max_lines, queue)) {
		case 0:
			++printed;
			if (context) {
				printed += queue_len;
				queue = NULL;
				queue_len = 0;
			}
			break;
		case 1:
			/* filtered by max_lines */
			++more;
			break;
		case -1:
		default:
			/*
			 * Filtered by min_pcnt or non IP lines when
			 * context != 0
			 */
			if (!context)
				break;
			if (queue_len == context)
				queue = list_entry(queue->node.next, typeof(*queue), node);
			else
				++queue_len;
			break;
		}
	}

	return more;
}

void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
{
	struct annotation *notes = symbol__annotation(sym);
	struct sym_hist *h = annotation__histogram(notes, evidx);

	memset(h, 0, notes->src->sizeof_sym_hist);
}

void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
{
	struct annotation *notes = symbol__annotation(sym);
	struct sym_hist *h = annotation__histogram(notes, evidx);
	int len = sym->end - sym->start, offset;

	h->sum = 0;
	for (offset = 0; offset < len; ++offset) {
		h->addr[offset] = h->addr[offset] * 7 / 8;
		h->sum += h->addr[offset];
	}
}

void objdump_line_list__purge(struct list_head *head)
{
	struct objdump_line *pos, *n;

	list_for_each_entry_safe(pos, n, head, node) {
		list_del(&pos->node);
		objdump_line__free(pos);
	}
}

int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,
			 bool print_lines, bool full_paths, int min_pcnt,
			 int max_lines)
{
	struct dso *dso = map->dso;
	const char *filename = dso->long_name;
	struct rb_root source_line = RB_ROOT;
	u64 len;

	if (symbol__annotate(sym, map, 0) < 0)
		return -1;

	len = sym->end - sym->start;

	if (print_lines) {
		symbol__get_source_line(sym, map, evidx, &source_line,
					len, filename);
		print_summary(&source_line, filename);
	}

	symbol__annotate_printf(sym, map, evidx, full_paths,
				min_pcnt, max_lines, 0);
	if (print_lines)
		symbol__free_source_line(sym, len);

	objdump_line_list__purge(&symbol__annotation(sym)->src->source);

	return 0;
}
Commit	Line	Data
78f7defe ACM	1	/*
	2	* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
	3	*
	4	* Parts came from builtin-annotate.c, see those files for further
	5	* copyright notes.
	6	*
	7	* Released under the GPL v2. (and only v2, not any later version)
	8	*/
	9
	10	#include "util.h"
	11	#include "build-id.h"
	12	#include "color.h"
	13	#include "cache.h"
	14	#include "symbol.h"
	15	#include "debug.h"
	16	#include "annotate.h"
ce6f4fab	17	#include <pthread.h>
78f7defe	18
f69b64f7 AK	19	const char *disassembler_style;
f69b64f7 AK	20
ce6f4fab	21	int symbol__annotate_init(struct map map __used, struct symbol sym)
78f7defe ACM	22	{
78f7defe ACM	23	struct annotation *notes = symbol__annotation(sym);
ce6f4fab ACM	24	pthread_mutex_init(&notes->lock, NULL);
	25	return 0;
	26	}
78f7defe	27
d04b35f8	28	int symbol__alloc_hist(struct symbol *sym)
ce6f4fab ACM	29	{
ce6f4fab ACM	30	struct annotation *notes = symbol__annotation(sym);
64c17be4 ACM	31	const size_t size = sym->end - sym->start + 1;
64c17be4 ACM	32	size_t sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64));
ce6f4fab	33
d04b35f8	34	notes->src = zalloc(sizeof(notes->src) + symbol_conf.nr_events sizeof_sym_hist);
ce6f4fab ACM	35	if (notes->src == NULL)
	36	return -1;
	37	notes->src->sizeof_sym_hist = sizeof_sym_hist;
d04b35f8	38	notes->src->nr_histograms = symbol_conf.nr_events;
ce6f4fab ACM	39	INIT_LIST_HEAD(&notes->src->source);
ce6f4fab ACM	40	return 0;
78f7defe ACM	41	}
78f7defe ACM	42
36532461 ACM	43	void symbol__annotate_zero_histograms(struct symbol *sym)
	44	{
	45	struct annotation *notes = symbol__annotation(sym);
	46
ce6f4fab ACM	47	pthread_mutex_lock(&notes->lock);
	48	if (notes->src != NULL)
	49	memset(notes->src->histograms, 0,
	50	notes->src->nr_histograms * notes->src->sizeof_sym_hist);
	51	pthread_mutex_unlock(&notes->lock);
36532461 ACM	52	}
36532461 ACM	53
2f525d01 ACM	54	int symbol__inc_addr_samples(struct symbol sym, struct map map,
2f525d01 ACM	55	int evidx, u64 addr)
78f7defe	56	{
2f525d01	57	unsigned offset;
78f7defe ACM	58	struct annotation *notes;
	59	struct sym_hist *h;
	60
78f7defe	61	notes = symbol__annotation(sym);
ce6f4fab	62	if (notes->src == NULL)
78f7defe ACM	63	return -ENOMEM;
78f7defe ACM	64
78f7defe ACM	65	pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
78f7defe ACM	66
31d68e7b ACM	67	if (addr < sym->start \|\| addr > sym->end)
31d68e7b ACM	68	return -ERANGE;
78f7defe	69
2f525d01 ACM	70	offset = addr - sym->start;
2f525d01 ACM	71	h = annotation__histogram(notes, evidx);
78f7defe ACM	72	h->sum++;
	73	h->addr[offset]++;
	74
	75	pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
2f525d01 ACM	76	", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
2f525d01 ACM	77	addr, addr - sym->start, evidx, h->addr[offset]);
78f7defe ACM	78	return 0;
	79	}
	80
	81	static struct objdump_line objdump_line__new(s64 offset, char line, size_t privsize)
	82	{
	83	struct objdump_line self = malloc(sizeof(self) + privsize);
	84
	85	if (self != NULL) {
	86	self->offset = offset;
	87	self->line = line;
	88	}
	89
	90	return self;
	91	}
	92
	93	void objdump_line__free(struct objdump_line *self)
	94	{
	95	free(self->line);
	96	free(self);
	97	}
	98
	99	static void objdump__add_line(struct list_head head, struct objdump_line line)
	100	{
	101	list_add_tail(&line->node, head);
	102	}
	103
	104	struct objdump_line objdump__get_next_ip_line(struct list_head head,
	105	struct objdump_line *pos)
	106	{
	107	list_for_each_entry_continue(pos, head, node)
	108	if (pos->offset >= 0)
	109	return pos;
	110
	111	return NULL;
	112	}
	113
ce6f4fab	114	static int objdump_line__print(struct objdump_line oline, struct symbol sym,
36532461	115	int evidx, u64 len, int min_pcnt,
d5e3d747 ACM	116	int printed, int max_lines,
d5e3d747 ACM	117	struct objdump_line *queue)
78f7defe ACM	118	{
	119	static const char *prev_line;
	120	static const char *prev_color;
	121
	122	if (oline->offset != -1) {
	123	const char *path = NULL;
	124	unsigned int hits = 0;
	125	double percent = 0.0;
	126	const char *color;
	127	struct annotation *notes = symbol__annotation(sym);
ce6f4fab	128	struct source_line *src_line = notes->src->lines;
2f525d01	129	struct sym_hist *h = annotation__histogram(notes, evidx);
78f7defe	130	s64 offset = oline->offset;
ce6f4fab ACM	131	struct objdump_line *next;
	132
	133	next = objdump__get_next_ip_line(&notes->src->source, oline);
78f7defe ACM	134
	135	while (offset < (s64)len &&
	136	(next == NULL \|\| offset < next->offset)) {
	137	if (src_line) {
	138	if (path == NULL)
	139	path = src_line[offset].path;
	140	percent += src_line[offset].percent;
	141	} else
	142	hits += h->addr[offset];
	143
	144	++offset;
	145	}
	146
	147	if (src_line == NULL && h->sum)
	148	percent = 100.0 * hits / h->sum;
	149
d040bd36	150	if (percent < min_pcnt)
36532461 ACM	151	return -1;
36532461 ACM	152
e3087b80	153	if (max_lines && printed >= max_lines)
36532461	154	return 1;
d040bd36	155
d5e3d747 ACM	156	if (queue != NULL) {
	157	list_for_each_entry_from(queue, &notes->src->source, node) {
	158	if (queue == oline)
	159	break;
	160	objdump_line__print(queue, sym, evidx, len,
	161	0, 0, 1, NULL);
	162	}
	163	}
	164
78f7defe ACM	165	color = get_percent_color(percent);
	166
	167	/*
	168	* Also color the filename and line if needed, with
	169	* the same color than the percentage. Don't print it
	170	* twice for close colored addr with the same filename:line
	171	*/
	172	if (path) {
	173	if (!prev_line \|\| strcmp(prev_line, path)
	174	\|\| color != prev_color) {
	175	color_fprintf(stdout, color, " %s", path);
	176	prev_line = path;
	177	prev_color = color;
	178	}
	179	}
	180
	181	color_fprintf(stdout, color, " %7.2f", percent);
	182	printf(" : ");
	183	color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", oline->line);
e3087b80	184	} else if (max_lines && printed >= max_lines)
36532461 ACM	185	return 1;
36532461 ACM	186	else {
d5e3d747 ACM	187	if (queue)
	188	return -1;
	189
78f7defe ACM	190	if (!*oline->line)
	191	printf(" :\n");
	192	else
	193	printf(" : %s\n", oline->line);
	194	}
36532461 ACM	195
36532461 ACM	196	return 0;
78f7defe ACM	197	}
78f7defe ACM	198
ce6f4fab ACM	199	static int symbol__parse_objdump_line(struct symbol sym, struct map map,
ce6f4fab ACM	200	FILE *file, size_t privsize)
78f7defe	201	{
ce6f4fab	202	struct annotation *notes = symbol__annotation(sym);
78f7defe ACM	203	struct objdump_line *objdump_line;
	204	char line = NULL, tmp, tmp2, c;
	205	size_t line_len;
	206	s64 line_ip, offset = -1;
	207
	208	if (getline(&line, &line_len, file) < 0)
	209	return -1;
	210
	211	if (!line)
	212	return -1;
	213
	214	while (line_len != 0 && isspace(line[line_len - 1]))
	215	line[--line_len] = '\0';
	216
	217	c = strchr(line, '\n');
	218	if (c)
	219	*c = 0;
	220
	221	line_ip = -1;
	222
	223	/*
	224	* Strip leading spaces:
	225	*/
	226	tmp = line;
	227	while (*tmp) {
	228	if (*tmp != ' ')
	229	break;
	230	tmp++;
	231	}
	232
	233	if (*tmp) {
	234	/*
	235	* Parse hexa addresses followed by ':'
	236	*/
	237	line_ip = strtoull(tmp, &tmp2, 16);
	238	if (*tmp2 != ':' \|\| tmp == tmp2 \|\| tmp2[1] == '\0')
	239	line_ip = -1;
	240	}
	241
	242	if (line_ip != -1) {
	243	u64 start = map__rip_2objdump(map, sym->start),
	244	end = map__rip_2objdump(map, sym->end);
	245
	246	offset = line_ip - start;
	247	if (offset < 0 \|\| (u64)line_ip > end)
	248	offset = -1;
	249	}
	250
	251	objdump_line = objdump_line__new(offset, line, privsize);
	252	if (objdump_line == NULL) {
	253	free(line);
	254	return -1;
	255	}
ce6f4fab	256	objdump__add_line(&notes->src->source, objdump_line);
78f7defe ACM	257
	258	return 0;
	259	}
	260
ce6f4fab	261	int symbol__annotate(struct symbol sym, struct map map, size_t privsize)
78f7defe ACM	262	{
	263	struct dso *dso = map->dso;
	264	char *filename = dso__build_id_filename(dso, NULL, 0);
	265	bool free_filename = true;
	266	char command[PATH_MAX * 2];
	267	FILE *file;
	268	int err = 0;
78f7defe ACM	269	char symfs_filename[PATH_MAX];
	270
	271	if (filename) {
	272	snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
	273	symbol_conf.symfs, filename);
	274	}
	275
	276	if (filename == NULL) {
	277	if (dso->has_build_id) {
	278	pr_err("Can't annotate %s: not enough memory\n",
	279	sym->name);
	280	return -ENOMEM;
	281	}
	282	goto fallback;
	283	} else if (readlink(symfs_filename, command, sizeof(command)) < 0 \|\|
	284	strstr(command, "[kernel.kallsyms]") \|\|
	285	access(symfs_filename, R_OK)) {
	286	free(filename);
	287	fallback:
	288	/*
	289	* If we don't have build-ids or the build-id file isn't in the
	290	* cache, or is just a kallsyms file, well, lets hope that this
	291	* DSO is the same as when 'perf record' ran.
	292	*/
	293	filename = dso->long_name;
	294	snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
	295	symbol_conf.symfs, filename);
	296	free_filename = false;
	297	}
	298
878b439d	299	if (dso->symtab_type == SYMTAB__KALLSYMS) {
170ae6bc ACM	300	char bf[BUILD_ID_SIZE * 2 + 16] = " with build id ";
	301	char *build_id_msg = NULL;
	302
78f7defe ACM	303	if (dso->annotate_warned)
78f7defe ACM	304	goto out_free_filename;
170ae6bc ACM	305
	306	if (dso->has_build_id) {
	307	build_id__sprintf(dso->build_id,
	308	sizeof(dso->build_id), bf + 15);
	309	build_id_msg = bf;
	310	}
78f7defe ACM	311	err = -ENOENT;
78f7defe ACM	312	dso->annotate_warned = 1;
ae55795e ACM	313	pr_err("Can't annotate %s:\n\n"
	314	"No vmlinux file%s\nwas found in the path.\n\n"
	315	"Please use:\n\n"
	316	" perf buildid-cache -av vmlinux\n\n"
	317	"or:\n\n"
ff2a6617	318	" --vmlinux vmlinux\n",
170ae6bc	319	sym->name, build_id_msg ?: "");
78f7defe ACM	320	goto out_free_filename;
	321	}
	322
	323	pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
	324	filename, sym->name, map->unmap_ip(map, sym->start),
	325	map->unmap_ip(map, sym->end));
	326
78f7defe ACM	327	pr_debug("annotating [%p] %30s : [%p] %30s\n",
	328	dso, dso->long_name, sym, sym->name);
	329
	330	snprintf(command, sizeof(command),
f69b64f7	331	"objdump %s%s --start-address=0x%016" PRIx64
3e6a2a7f SE	332	" --stop-address=0x%016" PRIx64
3e6a2a7f SE	333	" -d %s %s -C %s\|grep -v %s\|expand",
f69b64f7 AK	334	disassembler_style ? "-M " : "",
f69b64f7 AK	335	disassembler_style ? disassembler_style : "",
78f7defe	336	map__rip_2objdump(map, sym->start),
f41612f4	337	map__rip_2objdump(map, sym->end+1),
3e6a2a7f SE	338	symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
3e6a2a7f SE	339	symbol_conf.annotate_src ? "-S" : "",
78f7defe ACM	340	symfs_filename, filename);
	341
	342	pr_debug("Executing: %s\n", command);
	343
	344	file = popen(command, "r");
	345	if (!file)
	346	goto out_free_filename;
	347
	348	while (!feof(file))
ce6f4fab	349	if (symbol__parse_objdump_line(sym, map, file, privsize) < 0)
78f7defe ACM	350	break;
	351
	352	pclose(file);
	353	out_free_filename:
	354	if (free_filename)
	355	free(filename);
	356	return err;
	357	}
	358
	359	static void insert_source_line(struct rb_root root, struct source_line src_line)
	360	{
	361	struct source_line *iter;
	362	struct rb_node **p = &root->rb_node;
	363	struct rb_node *parent = NULL;
	364
	365	while (*p != NULL) {
	366	parent = *p;
	367	iter = rb_entry(parent, struct source_line, node);
	368
	369	if (src_line->percent > iter->percent)
	370	p = &(*p)->rb_left;
	371	else
	372	p = &(*p)->rb_right;
	373	}
	374
	375	rb_link_node(&src_line->node, parent, p);
	376	rb_insert_color(&src_line->node, root);
	377	}
	378
	379	static void symbol__free_source_line(struct symbol *sym, int len)
	380	{
	381	struct annotation *notes = symbol__annotation(sym);
ce6f4fab	382	struct source_line *src_line = notes->src->lines;
78f7defe ACM	383	int i;
	384
	385	for (i = 0; i < len; i++)
	386	free(src_line[i].path);
	387
	388	free(src_line);
ce6f4fab	389	notes->src->lines = NULL;
78f7defe ACM	390	}
	391
	392	/* Get the filename:line for the colored entries */
	393	static int symbol__get_source_line(struct symbol sym, struct map map,
2f525d01	394	int evidx, struct rb_root *root, int len,
78f7defe ACM	395	const char *filename)
	396	{
	397	u64 start;
	398	int i;
	399	char cmd[PATH_MAX * 2];
	400	struct source_line *src_line;
	401	struct annotation *notes = symbol__annotation(sym);
2f525d01	402	struct sym_hist *h = annotation__histogram(notes, evidx);
78f7defe ACM	403
	404	if (!h->sum)
	405	return 0;
	406
ce6f4fab ACM	407	src_line = notes->src->lines = calloc(len, sizeof(struct source_line));
ce6f4fab ACM	408	if (!notes->src->lines)
78f7defe ACM	409	return -1;
78f7defe ACM	410
f40a0633	411	start = map__rip_2objdump(map, sym->start);
78f7defe ACM	412
	413	for (i = 0; i < len; i++) {
	414	char *path = NULL;
	415	size_t line_len;
	416	u64 offset;
	417	FILE *fp;
	418
	419	src_line[i].percent = 100.0 * h->addr[i] / h->sum;
	420	if (src_line[i].percent <= 0.5)
	421	continue;
	422
	423	offset = start + i;
	424	sprintf(cmd, "addr2line -e %s %016" PRIx64, filename, offset);
	425	fp = popen(cmd, "r");
	426	if (!fp)
	427	continue;
	428
	429	if (getline(&path, &line_len, fp) < 0 \|\| !line_len)
	430	goto next;
	431
	432	src_line[i].path = malloc(sizeof(char) * line_len + 1);
	433	if (!src_line[i].path)
	434	goto next;
	435
	436	strcpy(src_line[i].path, path);
	437	insert_source_line(root, &src_line[i]);
	438
	439	next:
	440	pclose(fp);
	441	}
	442
	443	return 0;
	444	}
	445
	446	static void print_summary(struct rb_root root, const char filename)
	447	{
	448	struct source_line *src_line;
	449	struct rb_node *node;
	450
	451	printf("\nSorted summary for file %s\n", filename);
	452	printf("----------------------------------------------\n\n");
	453
	454	if (RB_EMPTY_ROOT(root)) {
	455	printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
	456	return;
	457	}
	458
	459	node = rb_first(root);
	460	while (node) {
	461	double percent;
	462	const char *color;
	463	char *path;
	464
	465	src_line = rb_entry(node, struct source_line, node);
	466	percent = src_line->percent;
	467	color = get_percent_color(percent);
	468	path = src_line->path;
	469
	470	color_fprintf(stdout, color, " %7.2f %s", percent, path);
	471	node = rb_next(node);
	472	}
	473	}
	474
2f525d01	475	static void symbol__annotate_hits(struct symbol *sym, int evidx)
78f7defe ACM	476	{
78f7defe ACM	477	struct annotation *notes = symbol__annotation(sym);
2f525d01	478	struct sym_hist *h = annotation__histogram(notes, evidx);
78f7defe ACM	479	u64 len = sym->end - sym->start, offset;
	480
	481	for (offset = 0; offset < len; ++offset)
	482	if (h->addr[offset] != 0)
	483	printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
	484	sym->start + offset, h->addr[offset]);
	485	printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
	486	}
	487
ce6f4fab	488	int symbol__annotate_printf(struct symbol sym, struct map map, int evidx,
d5e3d747 ACM	489	bool full_paths, int min_pcnt, int max_lines,
d5e3d747 ACM	490	int context)
78f7defe ACM	491	{
	492	struct dso *dso = map->dso;
	493	const char filename = dso->long_name, d_filename;
ce6f4fab	494	struct annotation *notes = symbol__annotation(sym);
d5e3d747 ACM	495	struct objdump_line pos, queue = NULL;
d5e3d747 ACM	496	int printed = 2, queue_len = 0;
36532461	497	int more = 0;
78f7defe ACM	498	u64 len;
78f7defe ACM	499
78f7defe ACM	500	if (full_paths)
	501	d_filename = filename;
	502	else
	503	d_filename = basename(filename);
	504
	505	len = sym->end - sym->start;
	506
78f7defe ACM	507	printf(" Percent \| Source code & Disassembly of %s\n", d_filename);
	508	printf("------------------------------------------------\n");
	509
	510	if (verbose)
2f525d01	511	symbol__annotate_hits(sym, evidx);
78f7defe	512
ce6f4fab	513	list_for_each_entry(pos, &notes->src->source, node) {
d5e3d747 ACM	514	if (context && queue == NULL) {
	515	queue = pos;
	516	queue_len = 0;
	517	}
	518
ce6f4fab	519	switch (objdump_line__print(pos, sym, evidx, len, min_pcnt,
d5e3d747	520	printed, max_lines, queue)) {
36532461 ACM	521	case 0:
36532461 ACM	522	++printed;
d5e3d747 ACM	523	if (context) {
	524	printed += queue_len;
	525	queue = NULL;
	526	queue_len = 0;
	527	}
36532461 ACM	528	break;
	529	case 1:
	530	/* filtered by max_lines */
	531	++more;
d040bd36	532	break;
36532461 ACM	533	case -1:
36532461 ACM	534	default:
d5e3d747 ACM	535	/*
	536	* Filtered by min_pcnt or non IP lines when
	537	* context != 0
	538	*/
	539	if (!context)
	540	break;
	541	if (queue_len == context)
	542	queue = list_entry(queue->node.next, typeof(*queue), node);
	543	else
	544	++queue_len;
36532461 ACM	545	break;
	546	}
	547	}
	548
	549	return more;
	550	}
f1e2701d	551
36532461 ACM	552	void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
	553	{
	554	struct annotation *notes = symbol__annotation(sym);
	555	struct sym_hist *h = annotation__histogram(notes, evidx);
	556
ce6f4fab	557	memset(h, 0, notes->src->sizeof_sym_hist);
36532461 ACM	558	}
36532461 ACM	559
ce6f4fab	560	void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
36532461 ACM	561	{
	562	struct annotation *notes = symbol__annotation(sym);
	563	struct sym_hist *h = annotation__histogram(notes, evidx);
8b84a568	564	int len = sym->end - sym->start, offset;
36532461 ACM	565
36532461 ACM	566	h->sum = 0;
8b84a568 ACM	567	for (offset = 0; offset < len; ++offset) {
	568	h->addr[offset] = h->addr[offset] * 7 / 8;
	569	h->sum += h->addr[offset];
f1e2701d ACM	570	}
	571	}
	572
	573	void objdump_line_list__purge(struct list_head *head)
	574	{
	575	struct objdump_line pos, n;
	576
	577	list_for_each_entry_safe(pos, n, head, node) {
	578	list_del(&pos->node);
	579	objdump_line__free(pos);
	580	}
	581	}
	582
	583	int symbol__tty_annotate(struct symbol sym, struct map map, int evidx,
	584	bool print_lines, bool full_paths, int min_pcnt,
	585	int max_lines)
	586	{
	587	struct dso *dso = map->dso;
	588	const char *filename = dso->long_name;
	589	struct rb_root source_line = RB_ROOT;
f1e2701d ACM	590	u64 len;
f1e2701d ACM	591
ce6f4fab	592	if (symbol__annotate(sym, map, 0) < 0)
f1e2701d ACM	593	return -1;
	594
	595	len = sym->end - sym->start;
	596
	597	if (print_lines) {
	598	symbol__get_source_line(sym, map, evidx, &source_line,
	599	len, filename);
	600	print_summary(&source_line, filename);
78f7defe ACM	601	}
78f7defe ACM	602
ce6f4fab	603	symbol__annotate_printf(sym, map, evidx, full_paths,
d5e3d747	604	min_pcnt, max_lines, 0);
78f7defe ACM	605	if (print_lines)
	606	symbol__free_source_line(sym, len);
	607
ce6f4fab	608	objdump_line_list__purge(&symbol__annotation(sym)->src->source);
f1e2701d	609
78f7defe ACM	610	return 0;
78f7defe ACM	611	}