[deliverable/linux.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>

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, int nevents)
{
	struct annotation *notes = symbol__annotation(sym);
	size_t sizeof_sym_hist = (sizeof(struct sym_hist) +
				  (sym->end - sym->start) * sizeof(u64));

	notes->src = zalloc(sizeof(*notes->src) + nevents * sizeof_sym_hist);
	if (notes->src == NULL)
		return -1;
	notes->src->sizeof_sym_hist = sizeof_sym_hist;
	notes->src->nr_histograms   = nevents;
	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->end)
		return 0;

	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)
{
	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;

		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 (!*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->origin == DSO__ORIG_KERNEL) {
		if (dso->annotate_warned)
			goto out_free_filename;
		err = -ENOENT;
		dso->annotate_warned = 1;
		pr_err("Can't annotate %s: No vmlinux file was found in the "
		       "path\n", sym->name);
		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 --start-address=0x%016" PRIx64
		 " --stop-address=0x%016" PRIx64 " -dS -C %s|grep -v %s|expand",
		 map__rip_2objdump(map, sym->start),
		 map__rip_2objdump(map, sym->end),
		 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->unmap_ip(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)
{
	struct dso *dso = map->dso;
	const char *filename = dso->long_name, *d_filename;
	struct annotation *notes = symbol__annotation(sym);
	struct objdump_line *pos;
	int printed = 2;
	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) {
		switch (objdump_line__print(pos, sym, evidx, len, min_pcnt,
					    printed, max_lines)) {
		case 0:
			++printed;
			break;
		case 1:
			/* filtered by max_lines */
			++more;
			break;
		case -1:
		default:
			/* filtered by min_pcnt */
			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);
	struct objdump_line *pos;

	h->sum = 0;

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