aboutsummaryrefslogtreecommitdiff
path: root/test/tsan/signal_cond.cc
diff options
context:
space:
mode:
Diffstat (limited to 'test/tsan/signal_cond.cc')
-rw-r--r--test/tsan/signal_cond.cc51
1 files changed, 51 insertions, 0 deletions
diff --git a/test/tsan/signal_cond.cc b/test/tsan/signal_cond.cc
new file mode 100644
index 000000000000..f5eae745d407
--- /dev/null
+++ b/test/tsan/signal_cond.cc
@@ -0,0 +1,51 @@
+// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
+#include "test.h"
+#include <signal.h>
+#include <unistd.h>
+#include <errno.h>
+#include <semaphore.h>
+
+// Test that signals can be delivered to blocked pthread_cond_wait.
+// https://code.google.com/p/thread-sanitizer/issues/detail?id=91
+
+int g_thread_run = 1;
+pthread_mutex_t mutex;
+pthread_cond_t cond;
+sem_t sem;
+
+void sig_handler(int sig) {
+ (void)sig;
+ write(1, "SIGNAL\n", sizeof("SIGNAL\n") - 1);
+ sem_post(&sem);
+}
+
+void* my_thread(void* arg) {
+ pthread_mutex_lock(&mutex);
+ while (g_thread_run)
+ pthread_cond_wait(&cond, &mutex);
+ pthread_mutex_unlock(&mutex);
+ return 0;
+}
+
+int main() {
+ sem_init(&sem, 0, 0);
+ signal(SIGUSR1, &sig_handler);
+ pthread_t thr;
+ pthread_create(&thr, 0, &my_thread, 0);
+ // wait for thread to get inside pthread_cond_wait
+ // (can't use barrier_wait for that)
+ sleep(1);
+ pthread_kill(thr, SIGUSR1);
+ while (sem_wait(&sem) == -1 && errno == EINTR) {
+ }
+ pthread_mutex_lock(&mutex);
+ g_thread_run = 0;
+ pthread_cond_signal(&cond);
+ pthread_mutex_unlock(&mutex);
+ pthread_join(thr, 0);
+ fprintf(stderr, "DONE\n");
+ return 0;
+}
+
+// CHECK: SIGNAL
+// CHECK: DONE