Add standalone cases (#3536)

tests/standalone/test-module-malloc/wasm-app/main.c

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2019 Intel Corporation.  All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+void *
+test_module_malloc(unsigned buf_size);
+
+void
+test_module_free(void *buf);
+
+int
+main(int argc, char **argv)
+{
+    char *buf = NULL;
+
+    printf("Hello World!\n");
+
+    buf = test_module_malloc(1024);
+    if (buf) {
+        printf("module_malloc(1024) success, return %p\n", buf);
+        snprintf(buf, 1024, "%s", "Hello world!\n");
+    }
+    else {
+        printf("module_malloc(1024) failed!\n");
+        return -1;
+    }
+
+    test_module_free(buf);
+
+    buf = test_module_malloc(32 * 1024 * 1024);
+    if (!buf) {
+        printf("module_malloc(32MB) failed => expected, not an issue\n");
+    }
+    else {
+        printf("module_malloc(32MB) success, unexpected!\n");
+        return -1;
+    }
+
+    return 0;
+}