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-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 ec635b7cc8e..73d0cac8b67 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;