blob: c749ba6136a0ac33d7cdae8bf5b6604f1ee524af [file] [log] [blame]
#include "util.h"
#include "build-id.h"
#include "hist.h"
#include "session.h"
#include "sort.h"
#include <math.h>
enum hist_filter {
HIST_FILTER__DSO,
HIST_FILTER__THREAD,
HIST_FILTER__PARENT,
};
struct callchain_param callchain_param = {
.mode = CHAIN_GRAPH_REL,
.min_percent = 0.5
};
u16 hists__col_len(struct hists *self, enum hist_column col)
{
return self->col_len[col];
}
void hists__set_col_len(struct hists *self, enum hist_column col, u16 len)
{
self->col_len[col] = len;
}
bool hists__new_col_len(struct hists *self, enum hist_column col, u16 len)
{
if (len > hists__col_len(self, col)) {
hists__set_col_len(self, col, len);
return true;
}
return false;
}
static void hists__reset_col_len(struct hists *self)
{
enum hist_column col;
for (col = 0; col < HISTC_NR_COLS; ++col)
hists__set_col_len(self, col, 0);
}
static void hists__calc_col_len(struct hists *self, struct hist_entry *h)
{
u16 len;
if (h->ms.sym)
hists__new_col_len(self, HISTC_SYMBOL, h->ms.sym->namelen);
len = thread__comm_len(h->thread);
if (hists__new_col_len(self, HISTC_COMM, len))
hists__set_col_len(self, HISTC_THREAD, len + 6);
if (h->ms.map) {
len = dso__name_len(h->ms.map->dso);
hists__new_col_len(self, HISTC_DSO, len);
}
}
static void hist_entry__add_cpumode_period(struct hist_entry *self,
unsigned int cpumode, u64 period)
{
switch (cpumode) {
case PERF_RECORD_MISC_KERNEL:
self->period_sys += period;
break;
case PERF_RECORD_MISC_USER:
self->period_us += period;
break;
case PERF_RECORD_MISC_GUEST_KERNEL:
self->period_guest_sys += period;
break;
case PERF_RECORD_MISC_GUEST_USER:
self->period_guest_us += period;
break;
default:
break;
}
}
/*
* histogram, sorted on item, collects periods
*/
static struct hist_entry *hist_entry__new(struct hist_entry *template)
{
size_t callchain_size = symbol_conf.use_callchain ? sizeof(struct callchain_root) : 0;
struct hist_entry *self = malloc(sizeof(*self) + callchain_size);
if (self != NULL) {
*self = *template;
self->nr_events = 1;
if (self->ms.map)
self->ms.map->referenced = true;
if (symbol_conf.use_callchain)
callchain_init(self->callchain);
}
return self;
}
static void hists__inc_nr_entries(struct hists *self, struct hist_entry *h)
{
if (!h->filtered) {
hists__calc_col_len(self, h);
++self->nr_entries;
}
}
static u8 symbol__parent_filter(const struct symbol *parent)
{
if (symbol_conf.exclude_other && parent == NULL)
return 1 << HIST_FILTER__PARENT;
return 0;
}
struct hist_entry *__hists__add_entry(struct hists *self,
struct addr_location *al,
struct symbol *sym_parent, u64 period)
{
struct rb_node **p = &self->entries.rb_node;
struct rb_node *parent = NULL;
struct hist_entry *he;
struct hist_entry entry = {
.thread = al->thread,
.ms = {
.map = al->map,
.sym = al->sym,
},
.cpu = al->cpu,
.ip = al->addr,
.level = al->level,
.period = period,
.parent = sym_parent,
.filtered = symbol__parent_filter(sym_parent),
};
int cmp;
while (*p != NULL) {
parent = *p;
he = rb_entry(parent, struct hist_entry, rb_node);
cmp = hist_entry__cmp(&entry, he);
if (!cmp) {
he->period += period;
++he->nr_events;
goto out;
}
if (cmp < 0)
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
}
he = hist_entry__new(&entry);
if (!he)
return NULL;
rb_link_node(&he->rb_node, parent, p);
rb_insert_color(&he->rb_node, &self->entries);
hists__inc_nr_entries(self, he);
out:
hist_entry__add_cpumode_period(he, al->cpumode, period);
return he;
}
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->se_cmp(left, right);
if (cmp)
break;
}
return cmp;
}
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->se_collapse ?: se->se_cmp;
cmp = f(left, right);
if (cmp)
break;
}
return cmp;
}
void hist_entry__free(struct hist_entry *he)
{
free(he);
}
/*
* collapse the histogram
*/
static bool collapse__insert_entry(struct rb_root *root, struct hist_entry *he)
{
struct rb_node **p = &root->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->period += he->period;
if (symbol_conf.use_callchain)
callchain_merge(iter->callchain, he->callchain);
hist_entry__free(he);
return false;
}
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, root);
return true;
}
void hists__collapse_resort(struct hists *self)
{
struct rb_root tmp;
struct rb_node *next;
struct hist_entry *n;
if (!sort__need_collapse)
return;
tmp = RB_ROOT;
next = rb_first(&self->entries);
self->nr_entries = 0;
hists__reset_col_len(self);
while (next) {
n = rb_entry(next, struct hist_entry, rb_node);
next = rb_next(&n->rb_node);
rb_erase(&n->rb_node, &self->entries);
if (collapse__insert_entry(&tmp, n))
hists__inc_nr_entries(self, n);
}
self->entries = tmp;
}
/*
* reverse the map, sort on period.
*/
static void __hists__insert_output_entry(struct rb_root *entries,
struct hist_entry *he,
u64 min_callchain_hits)
{
struct rb_node **p = &entries->rb_node;
struct rb_node *parent = NULL;
struct hist_entry *iter;
if (symbol_conf.use_callchain)
callchain_param.sort(&he->sorted_chain, he->callchain,
min_callchain_hits, &callchain_param);
while (*p != NULL) {
parent = *p;
iter = rb_entry(parent, struct hist_entry, rb_node);
if (he->period > iter->period)
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
}
rb_link_node(&he->rb_node, parent, p);
rb_insert_color(&he->rb_node, entries);
}
void hists__output_resort(struct hists *self)
{
struct rb_root tmp;
struct rb_node *next;
struct hist_entry *n;
u64 min_callchain_hits;
min_callchain_hits = self->stats.total_period * (callchain_param.min_percent / 100);
tmp = RB_ROOT;
next = rb_first(&self->entries);
self->nr_entries = 0;
hists__reset_col_len(self);
while (next) {
n = rb_entry(next, struct hist_entry, rb_node);
next = rb_next(&n->rb_node);
rb_erase(&n->rb_node, &self->entries);
__hists__insert_output_entry(&tmp, n, min_callchain_hits);
hists__inc_nr_entries(self, n);
}
self->entries = tmp;
}
static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
{
int i;
int ret = fprintf(fp, " ");
for (i = 0; i < left_margin; i++)
ret += fprintf(fp, " ");
return ret;
}
static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask,
int left_margin)
{
int i;
size_t ret = callchain__fprintf_left_margin(fp, left_margin);
for (i = 0; i < depth; i++)
if (depth_mask & (1 << i))
ret += fprintf(fp, "| ");
else
ret += fprintf(fp, " ");
ret += fprintf(fp, "\n");
return ret;
}
static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_list *chain,
int depth, int depth_mask, int period,
u64 total_samples, u64 hits,
int left_margin)
{
int i;
size_t ret = 0;
ret += callchain__fprintf_left_margin(fp, left_margin);
for (i = 0; i < depth; i++) {
if (depth_mask & (1 << i))
ret += fprintf(fp, "|");
else
ret += fprintf(fp, " ");
if (!period && i == depth - 1) {
double percent;
percent = hits * 100.0 / total_samples;
ret += percent_color_fprintf(fp, "--%2.2f%%-- ", percent);
} else
ret += fprintf(fp, "%s", " ");
}
if (chain->ms.sym)
ret += fprintf(fp, "%s\n", chain->ms.sym->name);
else
ret += fprintf(fp, "%p\n", (void *)(long)chain->ip);
return ret;
}
static struct symbol *rem_sq_bracket;
static struct callchain_list rem_hits;
static void init_rem_hits(void)
{
rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
if (!rem_sq_bracket) {
fprintf(stderr, "Not enough memory to display remaining hits\n");
return;
}
strcpy(rem_sq_bracket->name, "[...]");
rem_hits.ms.sym = rem_sq_bracket;
}
static size_t __callchain__fprintf_graph(FILE *fp, struct callchain_node *self,
u64 total_samples, int depth,
int depth_mask, int left_margin)
{
struct rb_node *node, *next;
struct callchain_node *child;
struct callchain_list *chain;
int new_depth_mask = depth_mask;
u64 new_total;
u64 remaining;
size_t ret = 0;
int i;
uint entries_printed = 0;
if (callchain_param.mode == CHAIN_GRAPH_REL)
new_total = self->children_hit;
else
new_total = total_samples;
remaining = new_total;
node = rb_first(&self->rb_root);
while (node) {
u64 cumul;
child = rb_entry(node, struct callchain_node, rb_node);
cumul = cumul_hits(child);
remaining -= cumul;
/*
* The depth mask manages the output of pipes that show
* the depth. We don't want to keep the pipes of the current
* level for the last child of this depth.
* Except if we have remaining filtered hits. They will
* supersede the last child
*/
next = rb_next(node);
if (!next && (callchain_param.mode != CHAIN_GRAPH_REL || !remaining))
new_depth_mask &= ~(1 << (depth - 1));
/*
* But we keep the older depth mask for the line separator
* to keep the level link until we reach the last child
*/
ret += ipchain__fprintf_graph_line(fp, depth, depth_mask,
left_margin);
i = 0;
list_for_each_entry(chain, &child->val, list) {
ret += ipchain__fprintf_graph(fp, chain, depth,
new_depth_mask, i++,
new_total,
cumul,
left_margin);
}
ret += __callchain__fprintf_graph(fp, child, new_total,
depth + 1,
new_depth_mask | (1 << depth),
left_margin);
node = next;
if (++entries_printed == callchain_param.print_limit)
break;
}
if (callchain_param.mode == CHAIN_GRAPH_REL &&
remaining && remaining != new_total) {
if (!rem_sq_bracket)
return ret;
new_depth_mask &= ~(1 << (depth - 1));
ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
new_depth_mask, 0, new_total,
remaining, left_margin);
}
return ret;
}
static size_t callchain__fprintf_graph(FILE *fp, struct callchain_node *self,
u64 total_samples, int left_margin)
{
struct callchain_list *chain;
bool printed = false;
int i = 0;
int ret = 0;
u32 entries_printed = 0;
list_for_each_entry(chain, &self->val, list) {
if (!i++ && sort__first_dimension == SORT_SYM)
continue;
if (!printed) {
ret += callchain__fprintf_left_margin(fp, left_margin);
ret += fprintf(fp, "|\n");
ret += callchain__fprintf_left_margin(fp, left_margin);
ret += fprintf(fp, "---");
left_margin += 3;
printed = true;
} else
ret += callchain__fprintf_left_margin(fp, left_margin);
if (chain->ms.sym)
ret += fprintf(fp, " %s\n", chain->ms.sym->name);
else
ret += fprintf(fp, " %p\n", (void *)(long)chain->ip);
if (++entries_printed == callchain_param.print_limit)
break;
}
ret += __callchain__fprintf_graph(fp, self, total_samples, 1, 1, left_margin);
return ret;
}
static size_t callchain__fprintf_flat(FILE *fp, struct callchain_node *self,
u64 total_samples)
{
struct callchain_list *chain;
size_t ret = 0;
if (!self)
return 0;
ret += callchain__fprintf_flat(fp, self->parent, total_samples);
list_for_each_entry(chain, &self->val, list) {
if (chain->ip >= PERF_CONTEXT_MAX)
continue;
if (chain->ms.sym)
ret += fprintf(fp, " %s\n", chain->ms.sym->name);
else
ret += fprintf(fp, " %p\n",
(void *)(long)chain->ip);
}
return ret;
}
static size_t hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
u64 total_samples, int left_margin)
{
struct rb_node *rb_node;
struct callchain_node *chain;
size_t ret = 0;
u32 entries_printed = 0;
rb_node = rb_first(&self->sorted_chain);
while (rb_node) {
double percent;
chain = rb_entry(rb_node, struct callchain_node, rb_node);
percent = chain->hit * 100.0 / total_samples;
switch (callchain_param.mode) {
case CHAIN_FLAT:
ret += percent_color_fprintf(fp, " %6.2f%%\n",
percent);
ret += callchain__fprintf_flat(fp, chain, total_samples);
break;
case CHAIN_GRAPH_ABS: /* Falldown */
case CHAIN_GRAPH_REL:
ret += callchain__fprintf_graph(fp, chain, total_samples,
left_margin);
case CHAIN_NONE:
default:
break;
}
ret += fprintf(fp, "\n");
if (++entries_printed == callchain_param.print_limit)
break;
rb_node = rb_next(rb_node);
}
return ret;
}
int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
struct hists *hists, struct hists *pair_hists,
bool show_displacement, long displacement,
bool color, u64 session_total)
{
struct sort_entry *se;
u64 period, total, period_sys, period_us, period_guest_sys, period_guest_us;
const char *sep = symbol_conf.field_sep;
int ret;
if (symbol_conf.exclude_other && !self->parent)
return 0;
if (pair_hists) {
period = self->pair ? self->pair->period : 0;
total = pair_hists->stats.total_period;
period_sys = self->pair ? self->pair->period_sys : 0;
period_us = self->pair ? self->pair->period_us : 0;
period_guest_sys = self->pair ? self->pair->period_guest_sys : 0;
period_guest_us = self->pair ? self->pair->period_guest_us : 0;
} else {
period = self->period;
total = session_total;
period_sys = self->period_sys;
period_us = self->period_us;
period_guest_sys = self->period_guest_sys;
period_guest_us = self->period_guest_us;
}
if (total) {
if (color)
ret = percent_color_snprintf(s, size,
sep ? "%.2f" : " %6.2f%%",
(period * 100.0) / total);
else
ret = snprintf(s, size, sep ? "%.2f" : " %6.2f%%",
(period * 100.0) / total);
if (symbol_conf.show_cpu_utilization) {
ret += percent_color_snprintf(s + ret, size - ret,
sep ? "%.2f" : " %6.2f%%",
(period_sys * 100.0) / total);
ret += percent_color_snprintf(s + ret, size - ret,
sep ? "%.2f" : " %6.2f%%",
(period_us * 100.0) / total);
if (perf_guest) {
ret += percent_color_snprintf(s + ret,
size - ret,
sep ? "%.2f" : " %6.2f%%",
(period_guest_sys * 100.0) /
total);
ret += percent_color_snprintf(s + ret,
size - ret,
sep ? "%.2f" : " %6.2f%%",
(period_guest_us * 100.0) /
total);
}
}
} else
ret = snprintf(s, size, sep ? "%lld" : "%12lld ", period);
if (symbol_conf.show_nr_samples) {
if (sep)
ret += snprintf(s + ret, size - ret, "%c%lld", *sep, period);
else
ret += snprintf(s + ret, size - ret, "%11lld", period);
}
if (pair_hists) {
char bf[32];
double old_percent = 0, new_percent = 0, diff;
if (total > 0)
old_percent = (period * 100.0) / total;
if (session_total > 0)
new_percent = (self->period * 100.0) / session_total;
diff = new_percent - old_percent;
if (fabs(diff) >= 0.01)
snprintf(bf, sizeof(bf), "%+4.2F%%", diff);
else
snprintf(bf, sizeof(bf), " ");
if (sep)
ret += snprintf(s + ret, size - ret, "%c%s", *sep, bf);
else
ret += snprintf(s + ret, size - ret, "%11.11s", bf);
if (show_displacement) {
if (displacement)
snprintf(bf, sizeof(bf), "%+4ld", displacement);
else
snprintf(bf, sizeof(bf), " ");
if (sep)
ret += snprintf(s + ret, size - ret, "%c%s", *sep, bf);
else
ret += snprintf(s + ret, size - ret, "%6.6s", bf);
}
}
list_for_each_entry(se, &hist_entry__sort_list, list) {
if (se->elide)
continue;
ret += snprintf(s + ret, size - ret, "%s", sep ?: " ");
ret += se->se_snprintf(self, s + ret, size - ret,
hists__col_len(hists, se->se_width_idx));
}
return ret;
}
int hist_entry__fprintf(struct hist_entry *self, struct hists *hists,
struct hists *pair_hists, bool show_displacement,
long displacement, FILE *fp, u64 session_total)
{
char bf[512];
hist_entry__snprintf(self, bf, sizeof(bf), hists, pair_hists,
show_displacement, displacement,
true, session_total);
return fprintf(fp, "%s\n", bf);
}
static size_t hist_entry__fprintf_callchain(struct hist_entry *self,
struct hists *hists, FILE *fp,
u64 session_total)
{
int left_margin = 0;
if (sort__first_dimension == SORT_COMM) {
struct sort_entry *se = list_first_entry(&hist_entry__sort_list,
typeof(*se), list);
left_margin = hists__col_len(hists, se->se_width_idx);
left_margin -= thread__comm_len(self->thread);
}
return hist_entry_callchain__fprintf(fp, self, session_total,
left_margin);
}
size_t hists__fprintf(struct hists *self, struct hists *pair,
bool show_displacement, FILE *fp)
{
struct sort_entry *se;
struct rb_node *nd;
size_t ret = 0;
unsigned long position = 1;
long displacement = 0;
unsigned int width;
const char *sep = symbol_conf.field_sep;
const char *col_width = symbol_conf.col_width_list_str;
init_rem_hits();
fprintf(fp, "# %s", pair ? "Baseline" : "Overhead");
if (symbol_conf.show_nr_samples) {
if (sep)
fprintf(fp, "%cSamples", *sep);
else
fputs(" Samples ", fp);
}
if (symbol_conf.show_cpu_utilization) {
if (sep) {
ret += fprintf(fp, "%csys", *sep);
ret += fprintf(fp, "%cus", *sep);
if (perf_guest) {
ret += fprintf(fp, "%cguest sys", *sep);
ret += fprintf(fp, "%cguest us", *sep);
}
} else {
ret += fprintf(fp, " sys ");
ret += fprintf(fp, " us ");
if (perf_guest) {
ret += fprintf(fp, " guest sys ");
ret += fprintf(fp, " guest us ");
}
}
}
if (pair) {
if (sep)
ret += fprintf(fp, "%cDelta", *sep);
else
ret += fprintf(fp, " Delta ");
if (show_displacement) {
if (sep)
ret += fprintf(fp, "%cDisplacement", *sep);
else
ret += fprintf(fp, " Displ");
}
}
list_for_each_entry(se, &hist_entry__sort_list, list) {
if (se->elide)
continue;
if (sep) {
fprintf(fp, "%c%s", *sep, se->se_header);
continue;
}
width = strlen(se->se_header);
if (symbol_conf.col_width_list_str) {
if (col_width) {
hists__set_col_len(self, se->se_width_idx,
atoi(col_width));
col_width = strchr(col_width, ',');
if (col_width)
++col_width;
}
}
if (!hists__new_col_len(self, se->se_width_idx, width))
width = hists__col_len(self, se->se_width_idx);
fprintf(fp, " %*s", width, se->se_header);
}
fprintf(fp, "\n");
if (sep)
goto print_entries;
fprintf(fp, "# ........");
if (symbol_conf.show_nr_samples)
fprintf(fp, " ..........");
if (pair) {
fprintf(fp, " ..........");
if (show_displacement)
fprintf(fp, " .....");
}
list_for_each_entry(se, &hist_entry__sort_list, list) {
unsigned int i;
if (se->elide)
continue;
fprintf(fp, " ");
width = hists__col_len(self, se->se_width_idx);
if (width == 0)
width = strlen(se->se_header);
for (i = 0; i < width; i++)
fprintf(fp, ".");
}
fprintf(fp, "\n#\n");
print_entries:
for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
if (show_displacement) {
if (h->pair != NULL)
displacement = ((long)h->pair->position -
(long)position);
else
displacement = 0;
++position;
}
ret += hist_entry__fprintf(h, self, pair, show_displacement,
displacement, fp, self->stats.total_period);
if (symbol_conf.use_callchain)
ret += hist_entry__fprintf_callchain(h, self, fp,
self->stats.total_period);
if (h->ms.map == NULL && verbose > 1) {
__map_groups__fprintf_maps(&h->thread->mg,
MAP__FUNCTION, verbose, fp);
fprintf(fp, "%.10s end\n", graph_dotted_line);
}
}
free(rem_sq_bracket);
return ret;
}
/*
* See hists__fprintf to match the column widths
*/
unsigned int hists__sort_list_width(struct hists *self)
{
struct sort_entry *se;
int ret = 9; /* total % */
if (symbol_conf.show_cpu_utilization) {
ret += 7; /* count_sys % */
ret += 6; /* count_us % */
if (perf_guest) {
ret += 13; /* count_guest_sys % */
ret += 12; /* count_guest_us % */
}
}
if (symbol_conf.show_nr_samples)
ret += 11;
list_for_each_entry(se, &hist_entry__sort_list, list)
if (!se->elide)
ret += 2 + hists__col_len(self, se->se_width_idx);
if (verbose) /* Addr + origin */
ret += 3 + BITS_PER_LONG / 4;
return ret;
}
static void hists__remove_entry_filter(struct hists *self, struct hist_entry *h,
enum hist_filter filter)
{
h->filtered &= ~(1 << filter);
if (h->filtered)
return;
++self->nr_entries;
if (h->ms.unfolded)
self->nr_entries += h->nr_rows;
h->row_offset = 0;
self->stats.total_period += h->period;
self->stats.nr_events[PERF_RECORD_SAMPLE] += h->nr_events;
hists__calc_col_len(self, h);
}
void hists__filter_by_dso(struct hists *self, const struct dso *dso)
{
struct rb_node *nd;
self->nr_entries = self->stats.total_period = 0;
self->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
hists__reset_col_len(self);
for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
if (symbol_conf.exclude_other && !h->parent)
continue;
if (dso != NULL && (h->ms.map == NULL || h->ms.map->dso != dso)) {
h->filtered |= (1 << HIST_FILTER__DSO);
continue;
}
hists__remove_entry_filter(self, h, HIST_FILTER__DSO);
}
}
void hists__filter_by_thread(struct hists *self, const struct thread *thread)
{
struct rb_node *nd;
self->nr_entries = self->stats.total_period = 0;
self->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
hists__reset_col_len(self);
for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
if (thread != NULL && h->thread != thread) {
h->filtered |= (1 << HIST_FILTER__THREAD);
continue;
}
hists__remove_entry_filter(self, h, HIST_FILTER__THREAD);
}
}
static int symbol__alloc_hist(struct symbol *self)
{
struct sym_priv *priv = symbol__priv(self);
const int size = (sizeof(*priv->hist) +
(self->end - self->start) * sizeof(u64));
priv->hist = zalloc(size);
return priv->hist == NULL ? -1 : 0;
}
int hist_entry__inc_addr_samples(struct hist_entry *self, u64 ip)
{
unsigned int sym_size, offset;
struct symbol *sym = self->ms.sym;
struct sym_priv *priv;
struct sym_hist *h;
if (!sym || !self->ms.map)
return 0;
priv = symbol__priv(sym);
if (priv->hist == NULL && symbol__alloc_hist(sym) < 0)
return -ENOMEM;
sym_size = sym->end - sym->start;
offset = ip - sym->start;
pr_debug3("%s: ip=%#Lx\n", __func__, self->ms.map->unmap_ip(self->ms.map, ip));
if (offset >= sym_size)
return 0;
h = priv->hist;
h->sum++;
h->ip[offset]++;
pr_debug3("%#Lx %s: period++ [ip: %#Lx, %#Lx] => %Ld\n", self->ms.sym->start,
self->ms.sym->name, ip, ip - self->ms.sym->start, h->ip[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 hist_entry__parse_objdump_line(struct hist_entry *self, FILE *file,
struct list_head *head, size_t privsize)
{
struct symbol *sym = self->ms.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(self->ms.map, sym->start),
end = map__rip_2objdump(self->ms.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(head, objdump_line);
return 0;
}
int hist_entry__annotate(struct hist_entry *self, struct list_head *head,
size_t privsize)
{
struct symbol *sym = self->ms.sym;
struct map *map = self->ms.map;
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;
u64 len;
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=%#Lx, end=%#Lx\n", __func__,
filename, sym->name, map->unmap_ip(map, sym->start),
map->unmap_ip(map, sym->end));
len = sym->end - sym->start;
pr_debug("annotating [%p] %30s : [%p] %30s\n",
dso, dso->long_name, sym, sym->name);
snprintf(command, sizeof(command),
"objdump --start-address=0x%016Lx --stop-address=0x%016Lx -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 (hist_entry__parse_objdump_line(self, file, head, privsize) < 0)
break;
pclose(file);
out_free_filename:
if (free_filename)
free(filename);
return err;
}
void hists__inc_nr_events(struct hists *self, u32 type)
{
++self->stats.nr_events[0];
++self->stats.nr_events[type];
}
size_t hists__fprintf_nr_events(struct hists *self, FILE *fp)
{
int i;
size_t ret = 0;
for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
const char *name = event__get_event_name(i);
if (!strcmp(name, "UNKNOWN"))
continue;
ret += fprintf(fp, "%16s events: %10d\n", name,
self->stats.nr_events[i]);
}
return ret;
}