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perf hists browser: Handle browsing empty hists tree

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Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2011-03-04 21:19:21 -03:00
parent d7603d5122
commit 60098917c0
1 changed files with 15 additions and 7 deletions
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22
tools/perf/util/ui/browsers/hists.c
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@ -639,6 +639,9 @@ static void ui_browser__hists_seek(struct ui_browser *self,
struct rb_node *nd;
bool first = true;
if (self->nr_entries == 0)
return;
switch (whence) {
case SEEK_SET:
nd = hists__filter_entries(rb_first(self->entries));
@ -820,8 +823,8 @@ int hists__browse(struct hists *self, const char *helpline,
hists__browser_title(self, msg, sizeof(msg), ev_name,
dso_filter, thread_filter);
while (1) {
const struct thread *thread;
const struct dso *dso;
const struct thread *thread = NULL;
const struct dso *dso = NULL;
char *options[16];
int nr_options = 0, choice = 0, i,
annotate = -2, zoom_dso = -2, zoom_thread = -2,
@ -829,8 +832,10 @@ int hists__browse(struct hists *self, const char *helpline,
key = hist_browser__run(browser, msg);
thread = hist_browser__selected_thread(browser);
dso = browser->selection->map ? browser->selection->map->dso : NULL;
if (browser->he_selection != NULL) {
thread = hist_browser__selected_thread(browser);
dso = browser->selection->map ? browser->selection->map->dso : NULL;
}
switch (key) {
case NEWT_KEY_TAB:
@ -841,7 +846,8 @@ int hists__browse(struct hists *self, const char *helpline,
*/
goto out_free_stack;
case 'a':
if (browser->selection->map == NULL &&
if (browser->selection == NULL ||
browser->selection->map == NULL ||
browser->selection->map->dso->annotate_warned)
continue;
goto do_annotate;
@ -887,7 +893,8 @@ int hists__browse(struct hists *self, const char *helpline,
goto out_free_stack;
}
if (browser->selection->sym != NULL &&
if (browser->selection != NULL &&
browser->selection->sym != NULL &&
!browser->selection->map->dso->annotate_warned &&
asprintf(&options[nr_options], "Annotate %s",
browser->selection->sym->name) > 0)
@ -906,7 +913,8 @@ int hists__browse(struct hists *self, const char *helpline,
(dso->kernel ? "the Kernel" : dso->short_name)) > 0)
zoom_dso = nr_options++;
if (browser->selection->map != NULL &&
if (browser->selection != NULL &&
browser->selection->map != NULL &&
asprintf(&options[nr_options], "Browse map details") > 0)
browse_map = nr_options++;