Commit-ID: b135e5ee1a0e325166c30b16cf5493fea44ede45 Gitweb: https://git.kernel.org/tip/b135e5ee1a0e325166c30b16cf5493fea44ede45 Author: Jiri Olsa <jolsa@xxxxxxxxxx> AuthorDate: Tue, 14 Nov 2017 10:23:39 +0100 Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> CommitDate: Fri, 17 Nov 2017 12:16:23 -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@xxxxxxxxxx> Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Tested-by: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxxxxxxx> Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx> Cc: Andi Kleen <andi@xxxxxxxxxxxxxx> Cc: David Ahern <dsahern@xxxxxxxxx> Cc: Namhyung Kim <namhyung@xxxxxxxxxx> Cc: Wang Nan <wangnan0@xxxxxxxxxx> Link: http://lkml.kernel.org/n/tip-ysuzwz77oev1ftgvdscn9bpu@xxxxxxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- 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 8651912..4cbd3dd 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); } @@ -480,7 +484,7 @@ 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); @@ -1035,6 +1039,11 @@ 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; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html