linux/tools/perf/builtin-annotate.c
Peter Zijlstra fa6963b248 perf tools: Check perf.data owner
Add an owner check to opening perf.data files and a switch to
silence it.

Because perf-report/perf-annotate are binary parsers reading
another users' perf.data file could be a security risk if the
file were explicitly engineered to trigger bugs in the parser
(we hope of course there are non such bugs, but you never
know).

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20090819092023.896648538@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-19 15:25:51 +02:00

1505 lines
29 KiB
C

/*
* 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"
#include <linux/list.h>
#include "util/cache.h"
#include <linux/rbtree.h>
#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";
static char *vmlinux = "vmlinux";
static char default_sort_order[] = "comm,symbol";
static char *sort_order = default_sort_order;
static int force;
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;
static int modules;
static int full_paths;
static int print_line;
static unsigned long page_size;
static unsigned long mmap_window = 32;
struct ip_event {
struct perf_event_header header;
u64 ip;
u32 pid, tid;
};
struct mmap_event {
struct perf_event_header header;
u32 pid, tid;
u64 start;
u64 len;
u64 pgoff;
char filename[PATH_MAX];
};
struct comm_event {
struct perf_event_header header;
u32 pid, tid;
char comm[16];
};
struct fork_event {
struct perf_event_header header;
u32 pid, ppid;
};
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;
struct sym_ext {
struct rb_node node;
double percent;
char *path;
};
static LIST_HEAD(dsos);
static struct dso *kernel_dso;
static struct dso *vdso;
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);
}
static struct symbol *vdso__find_symbol(struct dso *dso, u64 ip)
{
return dso__find_symbol(dso, ip);
}
static int load_kernel(void)
{
int err;
kernel_dso = dso__new("[kernel]", 0);
if (!kernel_dso)
return -1;
err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose, modules);
if (err <= 0) {
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;
u64 start;
u64 end;
u64 pgoff;
u64 (*map_ip)(struct map *, u64);
struct dso *dso;
};
static u64 map__map_ip(struct map *map, u64 ip)
{
return ip - map->start + map->pgoff;
}
static u64 vdso__map_ip(struct map *map __used, u64 ip)
{
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)
{
return fprintf(fp, " %Lx-%Lx %Lx %s\n",
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;
}
static struct map *thread__find_map(struct thread *self, u64 ip)
{
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;
u64 ip;
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);
return fprintf(fp, "%016llx ", (u64)self->ip);
}
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)
{
u64 ip_l, ip_r;
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)
ret += fprintf(fp, "%#018llx ", (u64)self->ip);
if (self->sym) {
ret += fprintf(fp, "[%c] %s",
self->dso == kernel_dso ? 'k' : '.', self->sym->name);
} else {
ret += fprintf(fp, "%#016llx", (u64)self->ip);
}
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)
{
unsigned int i;
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;
}
/*
* collect histogram counts
*/
static void hist_hit(struct hist_entry *he, u64 ip)
{
unsigned int sym_size, offset;
struct symbol *sym = he->sym;
he->count++;
if (!sym || !sym->hist)
return;
sym_size = sym->end - sym->start;
offset = ip - sym->start;
if (offset >= sym_size)
return;
sym->hist_sum++;
sym->hist[offset]++;
if (verbose >= 3)
printf("%p %s: count++ [ip: %p, %08Lx] => %Ld\n",
(void *)(unsigned long)he->sym->start,
he->sym->name,
(void *)(unsigned long)ip, ip - he->sym->start,
sym->hist[offset]);
}
static int
hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
struct symbol *sym, u64 ip, char level)
{
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) {
hist_hit(he, ip);
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
process_sample_event(event_t *event, unsigned long offset, unsigned long head)
{
char level;
int show = 0;
struct dso *dso = NULL;
struct thread *thread = threads__findnew(event->ip.pid);
u64 ip = event->ip.ip;
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);
/*
* A thread clone will have the same PID for both
* parent and child.
*/
if (thread == parent)
return 0;
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) {
case PERF_EVENT_SAMPLE:
return process_sample_event(event, offset, head);
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;
}
static int
parse_line(FILE *file, struct symbol *sym, u64 start, u64 len)
{
char *line = NULL, *tmp, *tmp2;
static const char *prev_line;
static const char *prev_color;
unsigned int offset;
size_t line_len;
s64 line_ip;
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) {
const char *path = NULL;
unsigned int hits = 0;
double percent = 0.0;
char *color;
struct sym_ext *sym_ext = sym->priv;
offset = line_ip - start;
if (offset < len)
hits = sym->hist[offset];
if (offset < len && sym_ext) {
path = sym_ext[offset].path;
percent = sym_ext[offset].percent;
} else if (sym->hist_sum)
percent = 100.0 * hits / sym->hist_sum;
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 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;
}
}
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;
}
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);
}
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;
root_sym_ext = RB_ROOT;
}
/* Get the filename:line for the colored entries */
static void
get_source_line(struct symbol *sym, u64 start, int len, char *filename)
{
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;
u64 offset;
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;
sprintf(cmd, "addr2line -e %s %016llx", filename, offset);
fp = popen(cmd, "r");
if (!fp)
continue;
if (getline(&path, &line_len, fp) < 0 || !line_len)
goto next;
sym_ext[i].path = malloc(sizeof(char) * line_len + 1);
if (!sym_ext[i].path)
goto next;
strcpy(sym_ext[i].path, path);
insert_source_line(&sym_ext[i]);
next:
pclose(fp);
}
}
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;
color = get_percent_color(percent);
path = sym_ext->path;
color_fprintf(stdout, color, " %7.2f %s", percent, path);
node = rb_next(node);
}
}
static void annotate_sym(struct dso *dso, struct symbol *sym)
{
char *filename = dso->name, *d_filename;
u64 start, end, len;
char command[PATH_MAX*2];
FILE *file;
if (!filename)
return;
if (sym->module)
filename = sym->module->path;
else if (dso == kernel_dso)
filename = vmlinux;
start = sym->obj_start;
if (!start)
start = sym->start;
if (full_paths)
d_filename = filename;
else
d_filename = basename(filename);
end = start + sym->end - sym->start + 1;
len = sym->end - sym->start;
if (print_line) {
get_source_line(sym, start, len, filename);
print_summary(filename);
}
printf("\n\n------------------------------------------------\n");
printf(" Percent | Source code & Disassembly of %s\n", d_filename);
printf("------------------------------------------------\n");
if (verbose >= 2)
printf("annotating [%p] %30s : [%p] %30s\n", dso, dso->name, sym, sym->name);
sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s|grep -v %s",
(u64)start, (u64)end, filename, filename);
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);
if (print_line)
free_source_line(sym, len);
}
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);
}
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 (!force && (stat.st_uid != geteuid())) {
fprintf(stderr, "file: %s not owned by current user\n", input_name);
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;
if (offset + head < (unsigned long)stat.st_size)
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();
find_annotations();
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"),
OPT_STRING('s', "symbol", &sym_hist_filter, "symbol",
"symbol to annotate"),
OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
OPT_BOOLEAN('m', "modules", &modules,
"load module symbols - WARNING: use only with -k and LIVE kernel"),
OPT_BOOLEAN('l', "print-line", &print_line,
"print matching source lines (may be slow)"),
OPT_BOOLEAN('P', "full-paths", &full_paths,
"Don't shorten the displayed pathnames"),
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);
}
int cmd_annotate(int argc, const char **argv, const char *prefix __used)
{
symbol__init();
page_size = getpagesize();
argc = parse_options(argc, argv, options, annotate_usage, 0);
setup_sorting();
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)
usage_with_options(annotate_usage, options);
setup_pager();
return __cmd_annotate();
}