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perf ui/tui: Show fatal error message only if exists 

When perf exits with some error it shows the error message with
ui__error() or ui__warning() and then calls ui__exit() during
exit_browser().

On TUI, it then shows a window titled "Fatal Error" to inform user a
last message which might be related with this condition.  However it
sometimes contains no message and just annoyes users.

The usual case for this is running perf top as normal user.  (And
/proc/sys/kernel/perf_event_paranoid being 1).

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1421736050-5283-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2015-01-20 15:40:50 +09:00 committed by Arnaldo Carvalho de Melo
parent 605a306916
commit 4397bd2f90
2 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
tools/perf/ui/tui/helpline.c
View File

@ -9,6 +9,7 @@
#include "../libslang.h"
char ui_helpline__last_msg[1024];
bool tui_helpline__set;
static void tui_helpline__pop(void)
{
@ -35,6 +36,8 @@ static int tui_helpline__show(const char *format, va_list ap)
sizeof(ui_helpline__last_msg) - backlog, format, ap);
backlog += ret;
tui_helpline__set = true;
if (ui_helpline__last_msg[backlog - 1] == '\n') {
ui_helpline__puts(ui_helpline__last_msg);
SLsmg_refresh();

3
tools/perf/ui/tui/setup.c
View File

@ -17,6 +17,7 @@
static volatile int ui__need_resize;
extern struct perf_error_ops perf_tui_eops;
extern bool tui_helpline__set;
extern void hist_browser__init_hpp(void);
@ -159,7 +160,7 @@ out:
void ui__exit(bool wait_for_ok)
{
if (wait_for_ok)
if (wait_for_ok && tui_helpline__set)
ui__question_window("Fatal Error",
ui_helpline__last_msg,
"Press any key...", 0);