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Subject[PATCH 08/15] perf annotate browser: Allow navigation to called functions
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

I.e. when in the annotate TUI window, if Enter is pressed over an
assembly line with a 'callq' it will try to open another TUI window with
that symbol.

This is just a proof of concept and works only on x86_64, more work is
needed to support kernel modules, userland, other arches, etc, but
should already be useful as-is.

Suggested-by: Ingo Molnar <mingo@elte.hu>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-opyvskw5na3qdmkv8vxi3zbr@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-annotate.c | 9 +++-
tools/perf/util/annotate.h | 2 +-
tools/perf/util/hist.h | 4 +-
tools/perf/util/ui/browsers/annotate.c | 69 ++++++++++++++++++++++++++-----
tools/perf/util/ui/browsers/hists.c | 20 ++++++----
5 files changed, 79 insertions(+), 25 deletions(-)
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 39e3d38..24db9d2 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -114,7 +114,8 @@ static int hist_entry__tty_annotate(struct hist_entry *he, int evidx)
print_line, full_paths, 0, 0);
}

-static void hists__find_annotations(struct hists *self, int evidx)
+static void hists__find_annotations(struct hists *self, int evidx,
+ int nr_events)
{
struct rb_node *nd = rb_first(&self->entries), *next;
int key = KEY_RIGHT;
@@ -137,7 +138,8 @@ find_next:
}

if (use_browser > 0) {
- key = hist_entry__tui_annotate(he, evidx, NULL, NULL, 0);
+ key = hist_entry__tui_annotate(he, evidx, nr_events,
+ NULL, NULL, 0);
switch (key) {
case KEY_RIGHT:
next = rb_next(nd);
@@ -215,7 +217,8 @@ static int __cmd_annotate(void)
total_nr_samples += nr_samples;
hists__collapse_resort(hists);
hists__output_resort(hists);
- hists__find_annotations(hists, pos->idx);
+ hists__find_annotations(hists, pos->idx,
+ session->evlist->nr_entries);
}
}

diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index aafbc7e..d907252 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -99,7 +99,7 @@ static inline int symbol__tui_annotate(struct symbol *sym __used,
}
#else
int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
- void(*timer)(void *arg), void *arg,
+ int nr_events, void(*timer)(void *arg), void *arg,
int delay_secs);
#endif

diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index f87677b..7ea1e56 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -110,7 +110,7 @@ int perf_evlist__tui_browse_hists(struct perf_evlist *evlist __used,
}

static inline int hist_entry__tui_annotate(struct hist_entry *self __used,
- int evidx __used,
+ int evidx __used, int nr_events __used,
void(*timer)(void *arg) __used,
void *arg __used, int delay_secs __used);
{
@@ -120,7 +120,7 @@ static inline int hist_entry__tui_annotate(struct hist_entry *self __used,
#define KEY_RIGHT -2
#else
#include <newt.h>
-int hist_entry__tui_annotate(struct hist_entry *he, int evidx,
+int hist_entry__tui_annotate(struct hist_entry *he, int evidx, int nr_events,
void(*timer)(void *arg), void *arg, int delay_secs);

#define KEY_LEFT NEWT_KEY_LEFT
diff --git a/tools/perf/util/ui/browsers/annotate.c b/tools/perf/util/ui/browsers/annotate.c
index 76c1d08..77421ba 100644
--- a/tools/perf/util/ui/browsers/annotate.c
+++ b/tools/perf/util/ui/browsers/annotate.c
@@ -20,6 +20,7 @@ struct annotate_browser {
struct ui_browser b;
struct rb_root entries;
struct rb_node *curr_hot;
+ struct objdump_line *selection;
};

struct objdump_line_rb_node {
@@ -36,6 +37,7 @@ struct objdump_line_rb_node *objdump_line__rb(struct objdump_line *self)

static void annotate_browser__write(struct ui_browser *self, void *entry, int row)
{
+ struct annotate_browser *ab = container_of(self, struct annotate_browser, b);
struct objdump_line *ol = rb_entry(entry, struct objdump_line, node);
bool current_entry = ui_browser__is_current_entry(self, row);
int width = self->width;
@@ -58,6 +60,8 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro

if (!current_entry)
ui_browser__set_color(self, HE_COLORSET_CODE);
+ else
+ ab->selection = ol;
}

static double objdump_line__calc_percent(struct objdump_line *self,
@@ -141,7 +145,8 @@ static void annotate_browser__set_top(struct annotate_browser *self,
static void annotate_browser__calc_percent(struct annotate_browser *browser,
int evidx)
{
- struct symbol *sym = browser->b.priv;
+ struct map_symbol *ms = browser->b.priv;
+ struct symbol *sym = ms->sym;
struct annotation *notes = symbol__annotation(sym);
struct objdump_line *pos;

@@ -164,17 +169,18 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
}

static int annotate_browser__run(struct annotate_browser *self, int evidx,
- void(*timer)(void *arg) __used, void *arg __used,
- int delay_secs)
+ int nr_events, void(*timer)(void *arg),
+ void *arg, int delay_secs)
{
struct rb_node *nd = NULL;
- struct symbol *sym = self->b.priv;
+ struct map_symbol *ms = self->b.priv;
+ struct symbol *sym = ms->sym;
/*
* RIGHT To allow builtin-annotate to cycle thru multiple symbols by
* examining the exit key for this function.
*/
int exit_keys[] = { 'H', NEWT_KEY_TAB, NEWT_KEY_UNTAB,
- NEWT_KEY_RIGHT, 0 };
+ NEWT_KEY_RIGHT, NEWT_KEY_ENTER, 0 };
int key;

if (ui_browser__show(&self->b, sym->name,
@@ -238,6 +244,42 @@ static int annotate_browser__run(struct annotate_browser *self, int evidx,
case 'H':
nd = self->curr_hot;
break;
+ case NEWT_KEY_ENTER:
+ if (self->selection != NULL) {
+ char *s = strstr(self->selection->line, "callq ");
+ struct annotation *notes;
+ struct symbol *target;
+ u64 ip;
+
+ if (s == NULL)
+ continue;
+
+ s = strchr(s, ' ');
+ if (s++ == NULL)
+ continue;
+
+ ip = strtoull(s, NULL, 16);
+ ip = ms->map->map_ip(ms->map, ip);
+ target = map__find_symbol(ms->map, ip, NULL);
+ if (target == NULL)
+ continue;
+
+ notes = symbol__annotation(target);
+ pthread_mutex_lock(&notes->lock);
+
+ if (notes->src == NULL &&
+ symbol__alloc_hist(target, nr_events) < 0) {
+ pthread_mutex_unlock(&notes->lock);
+ ui__warning("Not enough memory for annotating '%s' symbol!\n",
+ target->name);
+ continue;
+ }
+
+ pthread_mutex_unlock(&notes->lock);
+ symbol__tui_annotate(target, ms->map, evidx, nr_events,
+ timer, arg, delay_secs);
+ }
+ break;
default:
goto out;
}
@@ -250,25 +292,29 @@ out:
return key;
}

-int hist_entry__tui_annotate(struct hist_entry *he, int evidx,
+int hist_entry__tui_annotate(struct hist_entry *he, int evidx, int nr_events,
void(*timer)(void *arg), void *arg, int delay_secs)
{
- return symbol__tui_annotate(he->ms.sym, he->ms.map, evidx,
+ return symbol__tui_annotate(he->ms.sym, he->ms.map, evidx, nr_events,
timer, arg, delay_secs);
}

int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
- void(*timer)(void *arg), void *arg,
- int delay_secs)
+ int nr_events, void(*timer)(void *arg), void *arg,
+ int delay_secs)
{
struct objdump_line *pos, *n;
struct annotation *notes;
+ struct map_symbol ms = {
+ .map = map,
+ .sym = sym,
+ };
struct annotate_browser browser = {
.b = {
.refresh = ui_browser__list_head_refresh,
.seek = ui_browser__list_head_seek,
.write = annotate_browser__write,
- .priv = sym,
+ .priv = &ms,
},
};
int ret;
@@ -300,7 +346,8 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,

browser.b.entries = &notes->src->source,
browser.b.width += 18; /* Percentage */
- ret = annotate_browser__run(&browser, evidx, timer, arg, delay_secs);
+ ret = annotate_browser__run(&browser, evidx, nr_events,
+ timer, arg, delay_secs);
list_for_each_entry_safe(pos, n, &notes->src->source, node) {
list_del(&pos->node);
objdump_line__free(pos);
diff --git a/tools/perf/util/ui/browsers/hists.c b/tools/perf/util/ui/browsers/hists.c
index 6244d19..f0515cb 100644
--- a/tools/perf/util/ui/browsers/hists.c
+++ b/tools/perf/util/ui/browsers/hists.c
@@ -825,7 +825,7 @@ static int hists__browser_title(struct hists *self, char *bf, size_t size,
return printed;
}

-static int perf_evsel__hists_browse(struct perf_evsel *evsel,
+static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
const char *helpline, const char *ev_name,
bool left_exits,
void(*timer)(void *arg), void *arg,
@@ -968,7 +968,7 @@ do_annotate:
if (he == NULL)
continue;

- hist_entry__tui_annotate(he, evsel->idx,
+ hist_entry__tui_annotate(he, evsel->idx, nr_events,
timer, arg, delay_secs);
} else if (choice == browse_map)
map__browse(browser->selection->map);
@@ -1042,7 +1042,8 @@ static void perf_evsel_menu__write(struct ui_browser *browser,
menu->selection = evsel;
}

-static int perf_evsel_menu__run(struct perf_evsel_menu *menu, const char *help,
+static int perf_evsel_menu__run(struct perf_evsel_menu *menu,
+ int nr_events, const char *help,
void(*timer)(void *arg), void *arg, int delay_secs)
{
int exit_keys[] = { NEWT_KEY_ENTER, NEWT_KEY_RIGHT, 0, };
@@ -1077,8 +1078,9 @@ static int perf_evsel_menu__run(struct perf_evsel_menu *menu, const char *help,
perf_evlist__set_selected(evlist, pos);
browse_hists:
ev_name = event_name(pos);
- key = perf_evsel__hists_browse(pos, help, ev_name, true,
- timer, arg, delay_secs);
+ key = perf_evsel__hists_browse(pos, nr_events, help,
+ ev_name, true, timer,
+ arg, delay_secs);
ui_browser__show_title(&menu->b, title);
break;
case NEWT_KEY_LEFT:
@@ -1150,7 +1152,8 @@ static int __perf_evlist__tui_browse_hists(struct perf_evlist *evlist,
pos->name = strdup(ev_name);
}

- return perf_evsel_menu__run(&menu, help, timer, arg, delay_secs);
+ return perf_evsel_menu__run(&menu, evlist->nr_entries, help, timer,
+ arg, delay_secs);
}

int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
@@ -1162,8 +1165,9 @@ int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
struct perf_evsel *first = list_entry(evlist->entries.next,
struct perf_evsel, node);
const char *ev_name = event_name(first);
- return perf_evsel__hists_browse(first, help, ev_name, false,
- timer, arg, delay_secs);
+ return perf_evsel__hists_browse(first, evlist->nr_entries, help,
+ ev_name, false, timer, arg,
+ delay_secs);
}

return __perf_evlist__tui_browse_hists(evlist, help,
--
1.6.2.5


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