samples/native-stack-overflow: Examine native functions with signature (#3382)

Note: wamrc chooses different methods to call native functions
with and without signatures.

samples/native-stack-overflow/src/signature.c

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2024 Midokura Japan KK.  All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "wasm_export.h"
+
+static int
+dummy(wasm_exec_env_t exec_env)
+{
+    return 0;
+}
+
+/* clang-format off */
+#define REG_NATIVE_FUNC(func_name, signature) \
+    { #func_name, dummy, signature, NULL }
+
+static NativeSymbol native_symbols[] = {
+    REG_NATIVE_FUNC(host_consume_stack_and_call_indirect, "(iii)i"),
+    REG_NATIVE_FUNC(host_consume_stack, "(i)i"),
+};
+/* clang-format on */
+
+uint32_t
+get_native_lib(char **p_module_name, NativeSymbol **p_native_symbols)
+{
+    *p_module_name = "env";
+    *p_native_symbols = native_symbols;
+    return sizeof(native_symbols) / sizeof(NativeSymbol);
+}