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-rw-r--r--lib/tsan/lit_tests/sigsuspend.cc38
1 files changed, 38 insertions, 0 deletions
diff --git a/lib/tsan/lit_tests/sigsuspend.cc b/lib/tsan/lit_tests/sigsuspend.cc
new file mode 100644
index 000000000000..78d507fa0af5
--- /dev/null
+++ b/lib/tsan/lit_tests/sigsuspend.cc
@@ -0,0 +1,38 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s
+#include <assert.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+#include <stdio.h>
+
+static bool signal_handler_ran = false;
+
+void do_nothing_signal_handler(int signum) {
+ write(1, "HANDLER\n", 8);
+ signal_handler_ran = true;
+}
+
+int main() {
+ const int kSignalToTest = SIGSYS;
+ assert(SIG_ERR != signal(kSignalToTest, do_nothing_signal_handler));
+ sigset_t empty_set;
+ assert(0 == sigemptyset(&empty_set));
+ sigset_t one_signal = empty_set;
+ assert(0 == sigaddset(&one_signal, kSignalToTest));
+ sigset_t old_set;
+ assert(0 == sigprocmask(SIG_BLOCK, &one_signal, &old_set));
+ raise(kSignalToTest);
+ assert(!signal_handler_ran);
+ sigset_t all_but_one;
+ assert(0 == sigfillset(&all_but_one));
+ assert(0 == sigdelset(&all_but_one, kSignalToTest));
+ sigsuspend(&all_but_one);
+ assert(signal_handler_ran);
+
+ // Restore the original set.
+ assert(0 == sigprocmask(SIG_SETMASK, &old_set, NULL));
+ printf("DONE");
+}
+
+// CHECK: HANDLER
+// CHECK: DONE