builtin-annotate.c 28.4 KB
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/*
 * builtin-annotate.c
 *
 * Builtin annotate 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/color.h"
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#include <linux/list.h>
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#include "util/cache.h"
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#include <linux/rbtree.h>
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#include "util/symbol.h"
#include "util/string.h"

#include "perf.h"

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

#define SHOW_KERNEL	1
#define SHOW_USER	2
#define SHOW_HV		4

static char		const *input_name = "perf.data";
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static char		*vmlinux = "vmlinux";
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static char		default_sort_order[] = "comm,symbol";
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static char		*sort_order = default_sort_order;

static int		input;
static int		show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;

static int		dump_trace = 0;
#define dprintf(x...)	do { if (dump_trace) printf(x); } while (0)

static int		verbose;

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static int		modules;

static int		full_paths;

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static int		print_line;

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static unsigned long	page_size;
static unsigned long	mmap_window = 32;

struct ip_event {
	struct perf_event_header header;
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	u64 ip;
	u32 pid, tid;
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};

struct mmap_event {
	struct perf_event_header header;
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	u32 pid, tid;
	u64 start;
	u64 len;
	u64 pgoff;
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	char filename[PATH_MAX];
};

struct comm_event {
	struct perf_event_header header;
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	u32 pid, tid;
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	char comm[16];
};

struct fork_event {
	struct perf_event_header header;
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	u32 pid, ppid;
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};

typedef union event_union {
	struct perf_event_header	header;
	struct ip_event			ip;
	struct mmap_event		mmap;
	struct comm_event		comm;
	struct fork_event		fork;
} event_t;

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struct sym_ext {
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	struct rb_node	node;
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	double		percent;
	char		*path;
};

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static LIST_HEAD(dsos);
static struct dso *kernel_dso;
static struct dso *vdso;

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static void dsos__add(struct dso *dso)
{
	list_add_tail(&dso->node, &dsos);
}

static struct dso *dsos__find(const char *name)
{
	struct dso *pos;

	list_for_each_entry(pos, &dsos, node)
		if (strcmp(pos->name, name) == 0)
			return pos;
	return NULL;
}

static struct dso *dsos__findnew(const char *name)
{
	struct dso *dso = dsos__find(name);
	int nr;

	if (dso)
		return dso;

	dso = dso__new(name, 0);
	if (!dso)
		goto out_delete_dso;

	nr = dso__load(dso, NULL, verbose);
	if (nr < 0) {
		if (verbose)
			fprintf(stderr, "Failed to open: %s\n", name);
		goto out_delete_dso;
	}
	if (!nr && verbose) {
		fprintf(stderr,
		"No symbols found in: %s, maybe install a debug package?\n",
				name);
	}

	dsos__add(dso);

	return dso;

out_delete_dso:
	dso__delete(dso);
	return NULL;
}

static void dsos__fprintf(FILE *fp)
{
	struct dso *pos;

	list_for_each_entry(pos, &dsos, node)
		dso__fprintf(pos, fp);
}

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static struct symbol *vdso__find_symbol(struct dso *dso, u64 ip)
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{
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	return dso__find_symbol(dso, ip);
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}

static int load_kernel(void)
{
	int err;

	kernel_dso = dso__new("[kernel]", 0);
	if (!kernel_dso)
		return -1;

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	err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose, modules);
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	if (err <= 0) {
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		dso__delete(kernel_dso);
		kernel_dso = NULL;
	} else
		dsos__add(kernel_dso);

	vdso = dso__new("[vdso]", 0);
	if (!vdso)
		return -1;

	vdso->find_symbol = vdso__find_symbol;

	dsos__add(vdso);

	return err;
}

struct map {
	struct list_head node;
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	u64	 start;
	u64	 end;
	u64	 pgoff;
	u64	 (*map_ip)(struct map *, u64);
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	struct dso	 *dso;
};

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static u64 map__map_ip(struct map *map, u64 ip)
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{
	return ip - map->start + map->pgoff;
}

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static u64 vdso__map_ip(struct map *map __used, u64 ip)
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{
	return ip;
}

static struct map *map__new(struct mmap_event *event)
{
	struct map *self = malloc(sizeof(*self));

	if (self != NULL) {
		const char *filename = event->filename;

		self->start = event->start;
		self->end   = event->start + event->len;
		self->pgoff = event->pgoff;

		self->dso = dsos__findnew(filename);
		if (self->dso == NULL)
			goto out_delete;

		if (self->dso == vdso)
			self->map_ip = vdso__map_ip;
		else
			self->map_ip = map__map_ip;
	}
	return self;
out_delete:
	free(self);
	return NULL;
}

static struct map *map__clone(struct map *self)
{
	struct map *map = malloc(sizeof(*self));

	if (!map)
		return NULL;

	memcpy(map, self, sizeof(*self));

	return map;
}

static int map__overlap(struct map *l, struct map *r)
{
	if (l->start > r->start) {
		struct map *t = l;
		l = r;
		r = t;
	}

	if (l->end > r->start)
		return 1;

	return 0;
}

static size_t map__fprintf(struct map *self, FILE *fp)
{
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	return fprintf(fp, " %Lx-%Lx %Lx %s\n",
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		       self->start, self->end, self->pgoff, self->dso->name);
}


struct thread {
	struct rb_node	 rb_node;
	struct list_head maps;
	pid_t		 pid;
	char		 *comm;
};

static struct thread *thread__new(pid_t pid)
{
	struct thread *self = malloc(sizeof(*self));

	if (self != NULL) {
		self->pid = pid;
		self->comm = malloc(32);
		if (self->comm)
			snprintf(self->comm, 32, ":%d", self->pid);
		INIT_LIST_HEAD(&self->maps);
	}

	return self;
}

static int thread__set_comm(struct thread *self, const char *comm)
{
	if (self->comm)
		free(self->comm);
	self->comm = strdup(comm);
	return self->comm ? 0 : -ENOMEM;
}

static size_t thread__fprintf(struct thread *self, FILE *fp)
{
	struct map *pos;
	size_t ret = fprintf(fp, "Thread %d %s\n", self->pid, self->comm);

	list_for_each_entry(pos, &self->maps, node)
		ret += map__fprintf(pos, fp);

	return ret;
}


static struct rb_root threads;
static struct thread *last_match;

static struct thread *threads__findnew(pid_t pid)
{
	struct rb_node **p = &threads.rb_node;
	struct rb_node *parent = NULL;
	struct thread *th;

	/*
	 * Font-end cache - PID lookups come in blocks,
	 * so most of the time we dont have to look up
	 * the full rbtree:
	 */
	if (last_match && last_match->pid == pid)
		return last_match;

	while (*p != NULL) {
		parent = *p;
		th = rb_entry(parent, struct thread, rb_node);

		if (th->pid == pid) {
			last_match = th;
			return th;
		}

		if (pid < th->pid)
			p = &(*p)->rb_left;
		else
			p = &(*p)->rb_right;
	}

	th = thread__new(pid);
	if (th != NULL) {
		rb_link_node(&th->rb_node, parent, p);
		rb_insert_color(&th->rb_node, &threads);
		last_match = th;
	}

	return th;
}

static void thread__insert_map(struct thread *self, struct map *map)
{
	struct map *pos, *tmp;

	list_for_each_entry_safe(pos, tmp, &self->maps, node) {
		if (map__overlap(pos, map)) {
			list_del_init(&pos->node);
			/* XXX leaks dsos */
			free(pos);
		}
	}

	list_add_tail(&map->node, &self->maps);
}

static int thread__fork(struct thread *self, struct thread *parent)
{
	struct map *map;

	if (self->comm)
		free(self->comm);
	self->comm = strdup(parent->comm);
	if (!self->comm)
		return -ENOMEM;

	list_for_each_entry(map, &parent->maps, node) {
		struct map *new = map__clone(map);
		if (!new)
			return -ENOMEM;
		thread__insert_map(self, new);
	}

	return 0;
}

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static struct map *thread__find_map(struct thread *self, u64 ip)
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{
	struct map *pos;

	if (self == NULL)
		return NULL;

	list_for_each_entry(pos, &self->maps, node)
		if (ip >= pos->start && ip <= pos->end)
			return pos;

	return NULL;
}

static size_t threads__fprintf(FILE *fp)
{
	size_t ret = 0;
	struct rb_node *nd;

	for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
		struct thread *pos = rb_entry(nd, struct thread, rb_node);

		ret += thread__fprintf(pos, fp);
	}

	return ret;
}

/*
 * histogram, sorted on item, collects counts
 */

static struct rb_root hist;

struct hist_entry {
	struct rb_node	 rb_node;

	struct thread	 *thread;
	struct map	 *map;
	struct dso	 *dso;
	struct symbol	 *sym;
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	u64	 ip;
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	char		 level;

	uint32_t	 count;
};

/*
 * configurable sorting bits
 */

struct sort_entry {
	struct list_head list;

	char *header;

	int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
	int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
	size_t	(*print)(FILE *fp, struct hist_entry *);
};

/* --sort pid */

static int64_t
sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
{
	return right->thread->pid - left->thread->pid;
}

static size_t
sort__thread_print(FILE *fp, struct hist_entry *self)
{
	return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
}

static struct sort_entry sort_thread = {
	.header = "         Command:  Pid",
	.cmp	= sort__thread_cmp,
	.print	= sort__thread_print,
};

/* --sort comm */

static int64_t
sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
{
	return right->thread->pid - left->thread->pid;
}

static int64_t
sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
{
	char *comm_l = left->thread->comm;
	char *comm_r = right->thread->comm;

	if (!comm_l || !comm_r) {
		if (!comm_l && !comm_r)
			return 0;
		else if (!comm_l)
			return -1;
		else
			return 1;
	}

	return strcmp(comm_l, comm_r);
}

static size_t
sort__comm_print(FILE *fp, struct hist_entry *self)
{
	return fprintf(fp, "%16s", self->thread->comm);
}

static struct sort_entry sort_comm = {
	.header		= "         Command",
	.cmp		= sort__comm_cmp,
	.collapse	= sort__comm_collapse,
	.print		= sort__comm_print,
};

/* --sort dso */

static int64_t
sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
{
	struct dso *dso_l = left->dso;
	struct dso *dso_r = right->dso;

	if (!dso_l || !dso_r) {
		if (!dso_l && !dso_r)
			return 0;
		else if (!dso_l)
			return -1;
		else
			return 1;
	}

	return strcmp(dso_l->name, dso_r->name);
}

static size_t
sort__dso_print(FILE *fp, struct hist_entry *self)
{
	if (self->dso)
		return fprintf(fp, "%-25s", self->dso->name);

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	return fprintf(fp, "%016llx         ", (u64)self->ip);
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}

static struct sort_entry sort_dso = {
	.header = "Shared Object            ",
	.cmp	= sort__dso_cmp,
	.print	= sort__dso_print,
};

/* --sort symbol */

static int64_t
sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
{
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	u64 ip_l, ip_r;
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	if (left->sym == right->sym)
		return 0;

	ip_l = left->sym ? left->sym->start : left->ip;
	ip_r = right->sym ? right->sym->start : right->ip;

	return (int64_t)(ip_r - ip_l);
}

static size_t
sort__sym_print(FILE *fp, struct hist_entry *self)
{
	size_t ret = 0;

	if (verbose)
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		ret += fprintf(fp, "%#018llx  ", (u64)self->ip);
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	if (self->sym) {
		ret += fprintf(fp, "[%c] %s",
			self->dso == kernel_dso ? 'k' : '.', self->sym->name);
	} else {
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		ret += fprintf(fp, "%#016llx", (u64)self->ip);
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	}

	return ret;
}

static struct sort_entry sort_sym = {
	.header = "Symbol",
	.cmp	= sort__sym_cmp,
	.print	= sort__sym_print,
};

static int sort__need_collapse = 0;

struct sort_dimension {
	char			*name;
	struct sort_entry	*entry;
	int			taken;
};

static struct sort_dimension sort_dimensions[] = {
	{ .name = "pid",	.entry = &sort_thread,	},
	{ .name = "comm",	.entry = &sort_comm,	},
	{ .name = "dso",	.entry = &sort_dso,	},
	{ .name = "symbol",	.entry = &sort_sym,	},
};

static LIST_HEAD(hist_entry__sort_list);

static int sort_dimension__add(char *tok)
{
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	unsigned int i;
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	for (i = 0; i < ARRAY_SIZE(sort_dimensions); i++) {
		struct sort_dimension *sd = &sort_dimensions[i];

		if (sd->taken)
			continue;

		if (strncasecmp(tok, sd->name, strlen(tok)))
			continue;

		if (sd->entry->collapse)
			sort__need_collapse = 1;

		list_add_tail(&sd->entry->list, &hist_entry__sort_list);
		sd->taken = 1;

		return 0;
	}

	return -ESRCH;
}

static int64_t
hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
{
	struct sort_entry *se;
	int64_t cmp = 0;

	list_for_each_entry(se, &hist_entry__sort_list, list) {
		cmp = se->cmp(left, right);
		if (cmp)
			break;
	}

	return cmp;
}

static int64_t
hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
{
	struct sort_entry *se;
	int64_t cmp = 0;

	list_for_each_entry(se, &hist_entry__sort_list, list) {
		int64_t (*f)(struct hist_entry *, struct hist_entry *);

		f = se->collapse ?: se->cmp;

		cmp = f(left, right);
		if (cmp)
			break;
	}

	return cmp;
}

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/*
 * collect histogram counts
 */
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static void hist_hit(struct hist_entry *he, u64 ip)
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{
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	unsigned int sym_size, offset;
	struct symbol *sym = he->sym;
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	he->count++;
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	if (!sym || !sym->hist)
		return;
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	sym_size = sym->end - sym->start;
	offset = ip - sym->start;
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	if (offset >= sym_size)
		return;
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	sym->hist_sum++;
	sym->hist[offset]++;
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	if (verbose >= 3)
		printf("%p %s: count++ [ip: %p, %08Lx] => %Ld\n",
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			(void *)(unsigned long)he->sym->start,
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			he->sym->name,
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			(void *)(unsigned long)ip, ip - he->sym->start,
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			sym->hist[offset]);
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}

static int
hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
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		struct symbol *sym, u64 ip, char level)
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{
	struct rb_node **p = &hist.rb_node;
	struct rb_node *parent = NULL;
	struct hist_entry *he;
	struct hist_entry entry = {
		.thread	= thread,
		.map	= map,
		.dso	= dso,
		.sym	= sym,
		.ip	= ip,
		.level	= level,
		.count	= 1,
	};
	int cmp;

	while (*p != NULL) {
		parent = *p;
		he = rb_entry(parent, struct hist_entry, rb_node);

		cmp = hist_entry__cmp(&entry, he);

		if (!cmp) {
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			hist_hit(he, ip);

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			return 0;
		}

		if (cmp < 0)
			p = &(*p)->rb_left;
		else
			p = &(*p)->rb_right;
	}

	he = malloc(sizeof(*he));
	if (!he)
		return -ENOMEM;
	*he = entry;
	rb_link_node(&he->rb_node, parent, p);
	rb_insert_color(&he->rb_node, &hist);

	return 0;
}

static void hist_entry__free(struct hist_entry *he)
{
	free(he);
}

/*
 * collapse the histogram
 */

static struct rb_root collapse_hists;

static void collapse__insert_entry(struct hist_entry *he)
{
	struct rb_node **p = &collapse_hists.rb_node;
	struct rb_node *parent = NULL;
	struct hist_entry *iter;
	int64_t cmp;

	while (*p != NULL) {
		parent = *p;
		iter = rb_entry(parent, struct hist_entry, rb_node);

		cmp = hist_entry__collapse(iter, he);

		if (!cmp) {
			iter->count += he->count;
			hist_entry__free(he);
			return;
		}

		if (cmp < 0)
			p = &(*p)->rb_left;
		else
			p = &(*p)->rb_right;
	}

	rb_link_node(&he->rb_node, parent, p);
	rb_insert_color(&he->rb_node, &collapse_hists);
}

static void collapse__resort(void)
{
	struct rb_node *next;
	struct hist_entry *n;

	if (!sort__need_collapse)
		return;

	next = rb_first(&hist);
	while (next) {
		n = rb_entry(next, struct hist_entry, rb_node);
		next = rb_next(&n->rb_node);

		rb_erase(&n->rb_node, &hist);
		collapse__insert_entry(n);
	}
}

/*
 * reverse the map, sort on count.
 */

static struct rb_root output_hists;

static void output__insert_entry(struct hist_entry *he)
{
	struct rb_node **p = &output_hists.rb_node;
	struct rb_node *parent = NULL;
	struct hist_entry *iter;

	while (*p != NULL) {
		parent = *p;
		iter = rb_entry(parent, struct hist_entry, rb_node);

		if (he->count > iter->count)
			p = &(*p)->rb_left;
		else
			p = &(*p)->rb_right;
	}

	rb_link_node(&he->rb_node, parent, p);
	rb_insert_color(&he->rb_node, &output_hists);
}

static void output__resort(void)
{
	struct rb_node *next;
	struct hist_entry *n;
	struct rb_root *tree = &hist;

	if (sort__need_collapse)
		tree = &collapse_hists;

	next = rb_first(tree);

	while (next) {
		n = rb_entry(next, struct hist_entry, rb_node);
		next = rb_next(&n->rb_node);

		rb_erase(&n->rb_node, tree);
		output__insert_entry(n);
	}
}

static void register_idle_thread(void)
{
	struct thread *thread = threads__findnew(0);

	if (thread == NULL ||
			thread__set_comm(thread, "[idle]")) {
		fprintf(stderr, "problem inserting idle task.\n");
		exit(-1);
	}
}

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

static int
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process_sample_event(event_t *event, unsigned long offset, unsigned long head)
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{
	char level;
	int show = 0;
	struct dso *dso = NULL;
	struct thread *thread = threads__findnew(event->ip.pid);
856
	u64 ip = event->ip.ip;
857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995
	struct map *map = NULL;

	dprintf("%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);

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

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

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

		dso = kernel_dso;

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

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

		show = SHOW_USER;
		level = '.';

		map = thread__find_map(thread, ip);
		if (map != NULL) {
			ip = map->map_ip(map, ip);
			dso = map->dso;
		} else {
			/*
			 * If this is outside of all known maps,
			 * and is a negative address, try to look it
			 * up in the kernel dso, as it might be a
			 * vsyscall (which executes in user-mode):
			 */
			if ((long long)ip < 0)
				dso = kernel_dso;
		}
		dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");

	} else {
		show = SHOW_HV;
		level = 'H';
		dprintf(" ...... dso: [hypervisor]\n");
	}

	if (show & show_mask) {
		struct symbol *sym = NULL;

		if (dso)
			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");
			return -1;
		}
	}
	total++;

	return 0;
}

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

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

	if (thread == NULL || map == NULL) {
		dprintf("problem processing PERF_EVENT_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 = threads__findnew(event->comm.pid);

	dprintf("%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)) {
		dprintf("problem processing PERF_EVENT_COMM, skipping event.\n");
		return -1;
	}
	total_comm++;

	return 0;
}

static int
process_fork_event(event_t *event, unsigned long offset, unsigned long head)
{
	struct thread *thread = threads__findnew(event->fork.pid);
	struct thread *parent = threads__findnew(event->fork.ppid);

	dprintf("%p [%p]: PERF_EVENT_FORK: %d:%d\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->fork.pid, event->fork.ppid);

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

	return 0;
}

static int
process_event(event_t *event, unsigned long offset, unsigned long head)
{
	switch (event->header.type) {
996 997 998
	case PERF_EVENT_SAMPLE:
		return process_sample_event(event, offset, head);

999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
	case PERF_EVENT_MMAP:
		return process_mmap_event(event, offset, head);

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

	case PERF_EVENT_FORK:
		return process_fork_event(event, offset, head);
	/*
	 * We dont process them right now but they are fine:
	 */

	case PERF_EVENT_THROTTLE:
	case PERF_EVENT_UNTHROTTLE:
		return 0;

	default:
		return -1;
	}

	return 0;
}

1022
static int
1023
parse_line(FILE *file, struct symbol *sym, u64 start, u64 len)
1024 1025
{
	char *line = NULL, *tmp, *tmp2;
1026 1027
	static const char *prev_line;
	static const char *prev_color;
1028 1029
	unsigned int offset;
	size_t line_len;
1030
	s64 line_ip;
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
	int ret;
	char *c;

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

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

	line_ip = -1;
	offset = 0;
	ret = -2;

	/*
	 * 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 != ':')
			line_ip = -1;
	}

	if (line_ip != -1) {
1067
		const char *path = NULL;
1068 1069
		unsigned int hits = 0;
		double percent = 0.0;
1070
		char *color;
1071
		struct sym_ext *sym_ext = sym->priv;
1072 1073 1074 1075 1076

		offset = line_ip - start;
		if (offset < len)
			hits = sym->hist[offset];

1077
		if (offset < len && sym_ext) {
1078 1079 1080
			path = sym_ext[offset].path;
			percent = sym_ext[offset].percent;
		} else if (sym->hist_sum)
1081 1082
			percent = 100.0 * hits / sym->hist_sum;

1083
		color = get_percent_color(percent);
1084

1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098
		/*
		 * Also color the filename and line if needed, with
		 * the same color than the percentage. Don't print it
		 * twice for close colored ip 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;
			}
		}

1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111
		color_fprintf(stdout, color, " %7.2f", percent);
		printf(" :	");
		color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", line);
	} else {
		if (!*line)
			printf("         :\n");
		else
			printf("         :	%s\n", line);
	}

	return 0;
}

1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133
static struct rb_root root_sym_ext;

static void insert_source_line(struct sym_ext *sym_ext)
{
	struct sym_ext *iter;
	struct rb_node **p = &root_sym_ext.rb_node;
	struct rb_node *parent = NULL;

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

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

	rb_link_node(&sym_ext->node, parent, p);
	rb_insert_color(&sym_ext->node, &root_sym_ext);
}

1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
static void free_source_line(struct symbol *sym, int len)
{
	struct sym_ext *sym_ext = sym->priv;
	int i;

	if (!sym_ext)
		return;

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

	sym->priv = NULL;
1147
	root_sym_ext = RB_ROOT;
1148 1149 1150
}

/* Get the filename:line for the colored entries */
1151
static void
1152
get_source_line(struct symbol *sym, u64 start, int len, char *filename)
1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169
{
	int i;
	char cmd[PATH_MAX * 2];
	struct sym_ext *sym_ext;

	if (!sym->hist_sum)
		return;

	sym->priv = calloc(len, sizeof(struct sym_ext));
	if (!sym->priv)
		return;

	sym_ext = sym->priv;

	for (i = 0; i < len; i++) {
		char *path = NULL;
		size_t line_len;
1170
		u64 offset;
1171 1172 1173 1174 1175 1176 1177
		FILE *fp;

		sym_ext[i].percent = 100.0 * sym->hist[i] / sym->hist_sum;
		if (sym_ext[i].percent <= 0.5)
			continue;

		offset = start + i;
1178
		sprintf(cmd, "addr2line -e %s %016llx", filename, offset);
1179 1180 1181 1182 1183 1184 1185
		fp = popen(cmd, "r");
		if (!fp)
			continue;

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

1186
		sym_ext[i].path = malloc(sizeof(char) * line_len + 1);
1187 1188 1189 1190
		if (!sym_ext[i].path)
			goto next;

		strcpy(sym_ext[i].path, path);
1191
		insert_source_line(&sym_ext[i]);
1192 1193 1194 1195 1196 1197

	next:
		pclose(fp);
	}
}

1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218
static void print_summary(char *filename)
{
	struct sym_ext *sym_ext;
	struct rb_node *node;

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

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

	node = rb_first(&root_sym_ext);
	while (node) {
		double percent;
		char *color;
		char *path;

		sym_ext = rb_entry(node, struct sym_ext, node);
		percent = sym_ext->percent;
1219
		color = get_percent_color(percent);
1220 1221 1222 1223 1224 1225 1226
		path = sym_ext->path;

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

1227 1228
static void annotate_sym(struct dso *dso, struct symbol *sym)
{
1229
	char *filename = dso->name, *d_filename;
1230
	u64 start, end, len;
1231 1232 1233 1234 1235
	char command[PATH_MAX*2];
	FILE *file;

	if (!filename)
		return;
1236 1237 1238
	if (sym->module)
		filename = sym->module->path;
	else if (dso == kernel_dso)
1239 1240 1241 1242 1243
		filename = vmlinux;

	start = sym->obj_start;
	if (!start)
		start = sym->start;
1244 1245 1246 1247
	if (full_paths)
		d_filename = filename;
	else
		d_filename = basename(filename);
1248 1249 1250 1251

	end = start + sym->end - sym->start + 1;
	len = sym->end - sym->start;

1252
	if (print_line) {
1253
		get_source_line(sym, start, len, filename);
1254 1255 1256 1257
		print_summary(filename);
	}

	printf("\n\n------------------------------------------------\n");
1258
	printf(" Percent |	Source code & Disassembly of %s\n", d_filename);
1259 1260 1261 1262
	printf("------------------------------------------------\n");

	if (verbose >= 2)
		printf("annotating [%p] %30s : [%p] %30s\n", dso, dso->name, sym, sym->name);
1263

1264 1265
	sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s|grep -v %s",
			(u64)start, (u64)end, filename, filename);
1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279

	if (verbose >= 3)
		printf("doing: %s\n", command);

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

	while (!feof(file)) {
		if (parse_line(file, sym, start, len) < 0)
			break;
	}

	pclose(file);
1280 1281
	if (print_line)
		free_source_line(sym, len);
1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305
}

static void find_annotations(void)
{
	struct rb_node *nd;
	struct dso *dso;
	int count = 0;

	list_for_each_entry(dso, &dsos, node) {

		for (nd = rb_first(&dso->syms); nd; nd = rb_next(nd)) {
			struct symbol *sym = rb_entry(nd, struct symbol, rb_node);

			if (sym->hist) {
				annotate_sym(dso, sym);
				count++;
			}
		}
	}

	if (!count)
		printf(" Error: symbol '%s' not present amongst the samples.\n", sym_hist_filter);
}

1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395
static int __cmd_annotate(void)
{
	int ret, rc = EXIT_FAILURE;
	unsigned long offset = 0;
	unsigned long head = 0;
	struct stat stat;
	event_t *event;
	uint32_t size;
	char *buf;

	register_idle_thread();

	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 load kernel symbols");
		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;

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

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

		dprintf("%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;

1396
	if (offset + head < (unsigned long)stat.st_size)
1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418
		goto more;

	rc = EXIT_SUCCESS;
	close(input);

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

	if (dump_trace)
		return 0;

	if (verbose >= 3)
		threads__fprintf(stdout);

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

	collapse__resort();
	output__resort();
1419 1420

	find_annotations();
1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432

	return rc;
}

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

static const struct option options[] = {
	OPT_STRING('i', "input", &input_name, "file",
		    "input file name"),
1433
	OPT_STRING('s', "symbol", &sym_hist_filter, "symbol",
1434
		    "symbol to annotate"),
1435 1436 1437 1438 1439
	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"),
1440 1441
	OPT_BOOLEAN('m', "modules", &modules,
		    "load module symbols - WARNING: use only with -k and LIVE kernel"),
1442 1443
	OPT_BOOLEAN('l', "print-line", &print_line,
		    "print matching source lines (may be slow)"),
1444 1445
	OPT_BOOLEAN('P', "full-paths", &full_paths,
		    "Don't shorten the displayed pathnames"),
1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463
	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(annotate_usage, options);
		}
	}

	free(str);
}

1464
int cmd_annotate(int argc, const char **argv, const char *prefix __used)
1465 1466 1467 1468 1469 1470 1471 1472 1473
{
	symbol__init();

	page_size = getpagesize();

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

	setup_sorting();

1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485
	if (argc) {
		/*
		 * Special case: if there's an argument left then assume tha
		 * it's a symbol filter:
		 */
		if (argc > 1)
			usage_with_options(annotate_usage, options);

		sym_hist_filter = argv[0];
	}

	if (!sym_hist_filter)
1486 1487 1488 1489 1490 1491
		usage_with_options(annotate_usage, options);

	setup_pager();

	return __cmd_annotate();
}