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authorArnaldo Carvalho de Melo <acme@redhat.com>2011-10-13 08:52:46 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-10-13 08:52:46 -0300
commit3af6e33867b3814a73c3f3ba991a13d7304ad23a (patch)
tree28f0f4071736faca07252439a0037e27f0895a53 /tools/perf/perf.c
parent33e27312aeb05798572ccc456a76321125e8d7cb (diff)
downloadlinux-3af6e33867b3814a73c3f3ba991a13d7304ad23a.tar.gz
perf ui browser: Handle SIGWINCH
To do that we needed to stop using newtForm, as we don't want libnewt to catch the xterm resize signal. Remove some more newt calls and instead use the underlying libslang directly. In time tools/perf will use just libslang. 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-h1824yjiru5n2ivz4bseizwj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/perf.c')
-rw-r--r--tools/perf/perf.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index ec635b7cc8ea..73d0cac8b67e 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -427,6 +427,24 @@ static void get_debugfs_mntpt(void)
debugfs_mntpt[0] = '\0';
}
+static void pthread__block_sigwinch(void)
+{
+ sigset_t set;
+
+ sigemptyset(&set);
+ sigaddset(&set, SIGWINCH);
+ pthread_sigmask(SIG_BLOCK, &set, NULL);
+}
+
+void pthread__unblock_sigwinch(void)
+{
+ sigset_t set;
+
+ sigemptyset(&set);
+ sigaddset(&set, SIGWINCH);
+ pthread_sigmask(SIG_UNBLOCK, &set, NULL);
+}
+
int main(int argc, const char **argv)
{
const char *cmd;
@@ -480,6 +498,12 @@ int main(int argc, const char **argv)
* time.
*/
setup_path();
+ /*
+ * Block SIGWINCH notifications so that the thread that wants it can
+ * unblock and get syscalls like select interrupted instead of waiting
+ * forever while the signal goes to some other non interested thread.
+ */
+ pthread__block_sigwinch();
while (1) {
static int done_help;