Add no_resolve to LoadArgs and wasm_runtime_resolve_symbols (#3790)

Add no_resolve to LoadArgs and wasm_runtime_resolve_symbols so one can
delay resolving of symbols.

This is useful for inspecting the module between loading and instantiating.

core/iwasm/aot/aot_runtime.c

@@ -5111,3 +5111,125 @@ aot_get_module_name(AOTModule *module)
 {
     return module->name;
 }
+
+bool
+aot_resolve_symbols(AOTModule *module)
+{
+    bool ret = true;
+    uint32 idx;
+    for (idx = 0; idx < module->import_func_count; ++idx) {
+        AOTImportFunc *aot_import_func = &module->import_funcs[idx];
+        if (!aot_import_func->func_ptr_linked) {
+            if (!aot_resolve_import_func(module, aot_import_func)) {
+                LOG_WARNING("Failed to link function (%s, %s)",
+                            aot_import_func->module_name,
+                            aot_import_func->func_name);
+                ret = false;
+            }
+        }
+    }
+    return ret;
+}
+
+#if WASM_ENABLE_MULTI_MODULE != 0
+static void *
+aot_resolve_function(const AOTModule *module, const char *function_name,
+                     const AOTFuncType *expected_function_type, char *error_buf,
+                     uint32 error_buf_size);
+
+static void *
+aot_resolve_function_ex(const char *module_name, const char *function_name,
+                        const AOTFuncType *expected_function_type,
+                        char *error_buf, uint32 error_buf_size)
+{
+    WASMModuleCommon *module_reg;
+
+    module_reg = wasm_runtime_find_module_registered(module_name);
+    if (!module_reg || module_reg->module_type != Wasm_Module_AoT) {
+        LOG_DEBUG("can not find a module named %s for function %s", module_name,
+                  function_name);
+        set_error_buf(error_buf, error_buf_size, "unknown import");
+        return NULL;
+    }
+    return aot_resolve_function((AOTModule *)module_reg, function_name,
+                                expected_function_type, error_buf,
+                                error_buf_size);
+}
+
+static void *
+aot_resolve_function(const AOTModule *module, const char *function_name,
+                     const AOTFuncType *expected_function_type, char *error_buf,
+                     uint32 error_buf_size)
+{
+    void *function = NULL;
+    AOTExport *export = NULL;
+    AOTFuncType *target_function_type = NULL;
+
+    export = loader_find_export((WASMModuleCommon *)module, module->name,
+                                function_name, EXPORT_KIND_FUNC, error_buf,
+                                error_buf_size);
+    if (!export) {
+        return NULL;
+    }
+
+    /* resolve function type and function */
+    if (export->index < module->import_func_count) {
+        target_function_type = module->import_funcs[export->index].func_type;
+        function = module->import_funcs[export->index].func_ptr_linked;
+    }
+    else {
+        target_function_type =
+            (AOTFuncType *)module
+                ->types[module->func_type_indexes[export->index
+                                                  - module->import_func_count]];
+        function =
+            (module->func_ptrs[export->index - module->import_func_count]);
+    }
+    /* check function type */
+    if (!wasm_type_equal((WASMType *)expected_function_type,
+                         (WASMType *)target_function_type, module->types,
+                         module->type_count)) {
+        LOG_DEBUG("%s.%s failed the type check", module->name, function_name);
+        set_error_buf(error_buf, error_buf_size, "incompatible import type");
+        return NULL;
+    }
+    return function;
+}
+#endif /* end of WASM_ENABLE_MULTI_MODULE */
+
+bool
+aot_resolve_import_func(AOTModule *module, AOTImportFunc *import_func)
+{
+#if WASM_ENABLE_MULTI_MODULE != 0
+    char error_buf[128];
+    AOTModule *sub_module = NULL;
+#endif
+    import_func->func_ptr_linked = wasm_native_resolve_symbol(
+        import_func->module_name, import_func->func_name,
+        import_func->func_type, &import_func->signature,
+        &import_func->attachment, &import_func->call_conv_raw);
+#if WASM_ENABLE_MULTI_MODULE != 0
+    if (!import_func->func_ptr_linked) {
+        if (!wasm_runtime_is_built_in_module(import_func->module_name)) {
+            sub_module = (AOTModule *)wasm_runtime_load_depended_module(
+                (WASMModuleCommon *)module, import_func->module_name, error_buf,
+                sizeof(error_buf));
+            if (!sub_module) {
+                LOG_WARNING("Failed to load sub module: %s", error_buf);
+            }
+            if (!sub_module)
+                import_func->func_ptr_linked = aot_resolve_function_ex(
+                    import_func->module_name, import_func->func_name,
+                    import_func->func_type, error_buf, sizeof(error_buf));
+            else
+                import_func->func_ptr_linked = aot_resolve_function(
+                    sub_module, import_func->func_name, import_func->func_type,
+                    error_buf, sizeof(error_buf));
+            if (!import_func->func_ptr_linked) {
+                LOG_WARNING("Failed to link function: %s", error_buf);
+            }
+        }
+    }
+#endif
+    return import_func->func_ptr_linked != NULL;
+}