[<prev] [next>] [day] [month] [year] [list]
Message-ID: <tip-ysuzwz77oev1ftgvdscn9bpu@git.kernel.org>
Date: Tue, 28 Nov 2017 22:34:21 -0800
From: tip-bot for Jiri Olsa <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: ravi.bangoria@...ux.vnet.ibm.com, hpa@...or.com, acme@...hat.com,
wangnan0@...wei.com, linux-kernel@...r.kernel.org,
andi@...stfloor.org, jolsa@...nel.org, namhyung@...nel.org,
tglx@...utronix.de, mingo@...nel.org, adrian.hunter@...el.com,
dsahern@...il.com
Subject: [tip:perf/core] perf top: Fix window dimensions change handling
Commit-ID: 89d0aeab4252adc2a7ea693637dd21c588bfa2d1
Gitweb: https://git.kernel.org/tip/89d0aeab4252adc2a7ea693637dd21c588bfa2d1
Author: Jiri Olsa <jolsa@...nel.org>
AuthorDate: Tue, 14 Nov 2017 10:23:39 +0100
Committer: Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 28 Nov 2017 14:27:20 -0300
perf top: Fix window dimensions change handling
The stdio perf top crashes when we change the terminal
window size. The reason is that we assumed we get the
perf_top pointer as a signal handler argument which is
not the case.
Changing the SIGWINCH handler logic to change global
resize variable, which is checked in the main thread
loop.
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Tested-by: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/n/tip-ysuzwz77oev1ftgvdscn9bpu@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/builtin-top.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 1b01c27..4895738 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -77,6 +77,7 @@
#include "sane_ctype.h"
static volatile int done;
+static volatile int resize;
#define HEADER_LINE_NR 5
@@ -86,10 +87,13 @@ static void perf_top__update_print_entries(struct perf_top *top)
}
static void perf_top__sig_winch(int sig __maybe_unused,
- siginfo_t *info __maybe_unused, void *arg)
+ siginfo_t *info __maybe_unused, void *arg __maybe_unused)
{
- struct perf_top *top = arg;
+ resize = 1;
+}
+static void perf_top__resize(struct perf_top *top)
+{
get_term_dimensions(&top->winsize);
perf_top__update_print_entries(top);
}
@@ -477,7 +481,7 @@ static bool perf_top__handle_keypress(struct perf_top *top, int c)
.sa_sigaction = perf_top__sig_winch,
.sa_flags = SA_SIGINFO,
};
- perf_top__sig_winch(SIGWINCH, NULL, top);
+ perf_top__resize(top);
sigaction(SIGWINCH, &act, NULL);
} else {
signal(SIGWINCH, SIG_DFL);
@@ -1032,6 +1036,11 @@ static int __cmd_top(struct perf_top *top)
if (hits == top->samples)
ret = perf_evlist__poll(top->evlist, 100);
+
+ if (resize) {
+ perf_top__resize(top);
+ resize = 0;
+ }
}
ret = 0;
Powered by blists - more mailing lists