test: Add test for select without PROXY_TO_PTHREAD

Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com>

Author: ktock

test/core/test_select.c

@@ -0,0 +1,24 @@
+#include <sys/select.h>
+#include <time.h>
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+
+int pipe_a[2];
+
+int main() {
+  fd_set readfds;
+  const char *t = "test\n";
+
+  assert(pipe(pipe_a) == 0);
+  FD_ZERO(&readfds);
+  FD_SET(pipe_a[0], &readfds);
+  write(pipe_a[1], t, strlen(t));
+  assert(select(pipe_a[0] + 1, &readfds, NULL, NULL, NULL) == 1);
+  assert(FD_ISSET(pipe_a[0], &readfds));
+
+  close(pipe_a[0]); close(pipe_a[1]);
+
+  return 0;
+}

test/test_core.py

@@ -9665,6 +9665,10 @@ def test_syscall_intercept(self):
   def test_pthread_select_timeout(self):
     self.do_runf('core/test_pthread_select_timeout.c', cflags=['-pthread', '-sPROXY_TO_PTHREAD=1', '-sEXIT_RUNTIME=1', '-Wno-pthreads-mem-growth'])
 
+  def test_select(self):
+    self.do_runf('core/test_select.c')
+    self.do_runf('core/test_select.c', cflags=['-pthread'])
+
   @also_without_bigint
   def test_jslib_i64_params(self):
     # Tests the defineI64Param and receiveI64ParamAsI53 helpers that are