Implement register/call native API with raw (unextracted) arguments (#222)

This commit is contained in:
wenyongh 2020-04-01 12:52:08 +08:00 committed by GitHub
parent d9890d2ccb
commit c1a0e6d877
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
17 changed files with 344 additions and 41 deletions

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@ -786,7 +786,9 @@ load_import_funcs(const uint8 **p_buf, const uint8 *buf_end,
if (!(import_funcs[i].func_ptr_linked =
wasm_native_resolve_symbol(module_name, field_name,
import_funcs[i].func_type,
&import_funcs[i].signature))) {
&import_funcs[i].signature,
&import_funcs[i].attachment,
&import_funcs[i].call_conv_raw))) {
LOG_WARNING("warning: fail to link import function (%s, %s)\n",
module_name, field_name);
}

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@ -457,7 +457,7 @@ aot_call_function(WASMExecEnv *exec_env,
AOTModuleInstance *module_inst = (AOTModuleInstance*)exec_env->module_inst;
AOTFuncType *func_type = function->func_type;
bool ret = wasm_runtime_invoke_native(exec_env, function->func_ptr,
func_type, NULL, argv, argc, argv);
func_type, NULL, NULL, argv, argc, argv);
return ret && !aot_get_exception(module_inst) ? true : false;
}
@ -824,7 +824,8 @@ aot_invoke_native(WASMExecEnv *exec_env, uint32 func_idx,
void **func_ptrs = (void**)module_inst->func_ptrs.ptr;
void *func_ptr = func_ptrs[func_idx];
AOTImportFunc *import_func;
const char *signature = NULL;
const char *signature;
void *attachment;
char buf[128];
bh_assert(func_idx < aot_module->import_func_count);
@ -839,9 +840,17 @@ aot_invoke_native(WASMExecEnv *exec_env, uint32 func_idx,
}
signature = import_func->signature;
return wasm_runtime_invoke_native(exec_env, func_ptr,
func_type, signature,
frame_lp, argc, argv_ret);
attachment = import_func->attachment;
if (!import_func->call_conv_raw) {
return wasm_runtime_invoke_native(exec_env, func_ptr,
func_type, signature, attachment,
frame_lp, argc, argv_ret);
}
else {
return wasm_runtime_invoke_native_raw(exec_env, func_ptr,
func_type, signature, attachment,
frame_lp, argc, argv_ret);
}
}
bool
@ -860,6 +869,7 @@ aot_call_indirect(WASMExecEnv *exec_env,
uint32 func_idx, func_type_idx1;
AOTImportFunc *import_func;
const char *signature = NULL;
void *attachment = NULL;
char buf[128];
if (table_elem_idx >= table_size) {
@ -879,12 +889,6 @@ aot_call_indirect(WASMExecEnv *exec_env,
return false;
}
if (func_idx < aot_module->import_func_count) {
/* Call native function */
import_func = aot_module->import_funcs + func_idx;
signature = import_func->signature;
}
if (!(func_ptr = func_ptrs[func_idx])) {
bh_assert(func_idx < aot_module->import_func_count);
import_func = aot_module->import_funcs + func_idx;
@ -895,8 +899,20 @@ aot_call_indirect(WASMExecEnv *exec_env,
return false;
}
if (func_idx < aot_module->import_func_count) {
/* Call native function */
import_func = aot_module->import_funcs + func_idx;
signature = import_func->signature;
if (import_func->call_conv_raw) {
attachment = import_func->attachment;
return wasm_runtime_invoke_native_raw(exec_env, func_ptr,
func_type, signature, attachment,
frame_lp, argc, argv_ret);
}
}
return wasm_runtime_invoke_native(exec_env, func_ptr,
func_type, signature,
func_type, signature, attachment,
frame_lp, argc, argv_ret);
}

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@ -33,6 +33,11 @@ typedef struct WASMExecEnv {
uint32 *argv_buf;
#endif
/* attachment for native function */
void *attachment;
void *user_data;
/* Current interpreter frame of current thread */
struct WASMInterpFrame *cur_frame;

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@ -110,7 +110,7 @@ sort_symbol_ptr(NativeSymbol *native_symbols, uint32 n_native_symbols)
static void *
lookup_symbol(NativeSymbol *native_symbols, uint32 n_native_symbols,
const char *symbol, const char **p_signature)
const char *symbol, const char **p_signature, void **p_attachment)
{
int low = 0, mid, ret;
int high = n_native_symbols - 1;
@ -120,6 +120,7 @@ lookup_symbol(NativeSymbol *native_symbols, uint32 n_native_symbols,
ret = strcmp(symbol, native_symbols[mid].symbol);
if (ret == 0) {
*p_signature = native_symbols[mid].signature;
*p_attachment = native_symbols[mid].attachment;
return native_symbols[mid].func_ptr;
}
else if (ret < 0)
@ -133,11 +134,12 @@ lookup_symbol(NativeSymbol *native_symbols, uint32 n_native_symbols,
void*
wasm_native_resolve_symbol(const char *module_name, const char *field_name,
const WASMType *func_type, const char **p_signature)
const WASMType *func_type, const char **p_signature,
void **p_attachment, bool *p_call_conv_raw)
{
NativeSymbolsNode *node, *node_next;
const char *signature = NULL;
void *func_ptr = NULL;
void *func_ptr = NULL, *attachment;
node = g_native_symbols_list;
while (node) {
@ -145,11 +147,12 @@ wasm_native_resolve_symbol(const char *module_name, const char *field_name,
if (!strcmp(node->module_name, module_name)) {
if ((func_ptr = lookup_symbol(node->native_symbols,
node->n_native_symbols,
field_name, &signature))
field_name, &signature, &attachment))
|| (field_name[0] == '_'
&& (func_ptr = lookup_symbol(node->native_symbols,
node->n_native_symbols,
field_name + 1, &signature))))
field_name + 1,
&signature, &attachment))))
break;
}
node = node_next;
@ -172,15 +175,19 @@ wasm_native_resolve_symbol(const char *module_name, const char *field_name,
else
/* signature is empty */
*p_signature = NULL;
*p_attachment = attachment;
*p_call_conv_raw = node->call_conv_raw;
}
return func_ptr;
}
bool
wasm_native_register_natives(const char *module_name,
NativeSymbol *native_symbols,
uint32 n_native_symbols)
static bool
register_natives(const char *module_name,
NativeSymbol *native_symbols,
uint32 n_native_symbols,
bool call_conv_raw)
{
NativeSymbolsNode *node;
@ -190,6 +197,7 @@ wasm_native_register_natives(const char *module_name,
node->module_name = module_name;
node->native_symbols = native_symbols;
node->n_native_symbols = n_native_symbols;
node->call_conv_raw = call_conv_raw;
node->next = NULL;
if (g_native_symbols_list_end) {
@ -204,6 +212,22 @@ wasm_native_register_natives(const char *module_name,
return true;
}
bool
wasm_native_register_natives(const char *module_name,
NativeSymbol *native_symbols,
uint32 n_native_symbols)
{
return register_natives(module_name, native_symbols, n_native_symbols, false);
}
bool
wasm_native_register_natives_raw(const char *module_name,
NativeSymbol *native_symbols,
uint32 n_native_symbols)
{
return register_natives(module_name, native_symbols, n_native_symbols, true);
}
bool
wasm_native_init()
{

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@ -19,6 +19,7 @@ typedef struct NativeSymbolsNode {
const char *module_name;
NativeSymbol *native_symbols;
uint32 n_native_symbols;
bool call_conv_raw;
} NativeSymbolsNode, *NativeSymbolsList;
/**
@ -50,13 +51,19 @@ wasm_native_lookup_libc_builtin_global(const char *module_name,
*/
void*
wasm_native_resolve_symbol(const char *module_name, const char *field_name,
const WASMType *func_type, const char **p_signature);
const WASMType *func_type, const char **p_signature,
void **p_attachment, bool *p_call_conv_raw);
bool
wasm_native_register_natives(const char *module_name,
NativeSymbol *native_symbols,
uint32 n_native_symbols);
bool
wasm_native_register_natives_raw(const char *module_name,
NativeSymbol *native_symbols,
uint32 n_native_symbols);
bool
wasm_native_init();

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@ -233,6 +233,24 @@ wasm_runtime_get_module_inst(WASMExecEnv *exec_env)
return wasm_exec_env_get_module_inst(exec_env);
}
void *
wasm_runtime_get_function_attachment(WASMExecEnv *exec_env)
{
return exec_env->attachment;
}
void
wasm_runtime_set_user_data(WASMExecEnv *exec_env, void *user_data)
{
exec_env->user_data = user_data;
}
void *
wasm_runtime_get_user_data(WASMExecEnv *exec_env)
{
return exec_env->user_data;
}
WASMFunctionInstanceCommon *
wasm_runtime_lookup_function(WASMModuleInstanceCommon * const module_inst,
const char *name,
@ -1421,6 +1439,120 @@ wasm_runtime_register_natives(const char *module_name,
native_symbols, n_native_symbols);
}
bool
wasm_runtime_register_natives_raw(const char *module_name,
NativeSymbol *native_symbols,
uint32 n_native_symbols)
{
return wasm_native_register_natives_raw(module_name,
native_symbols, n_native_symbols);
}
bool
wasm_runtime_invoke_native_raw(WASMExecEnv *exec_env, void *func_ptr,
const WASMType *func_type, const char *signature,
void *attachment,
uint32 *argv, uint32 argc, uint32 *argv_ret)
{
WASMModuleInstanceCommon *module = wasm_runtime_get_module_inst(exec_env);
typedef void (*NativeRawFuncPtr)(WASMExecEnv*, uint64*);
NativeRawFuncPtr invokeNativeRaw = (NativeRawFuncPtr)func_ptr;
uint64 argv_buf[16] = { 0 }, *argv1 = argv_buf, *argv_dst, size;
uint32 *argv_src = argv, i, argc1, ptr_len;
int32 arg_i32;
bool ret = false;
argc1 = func_type->param_count;
if (argc1 > sizeof(argv_buf) / sizeof(uint64)) {
size = sizeof(uint64) * (uint64)argc1;
if (size >= UINT32_MAX
|| !(argv1 = wasm_runtime_malloc((uint32)size))) {
wasm_runtime_set_exception(exec_env->module_inst,
"allocate memory failed.");
return false;
}
memset(argv1, 0, (uint32)size);
}
argv_dst = argv1;
/* Traverse secondly to fill in each argument */
for (i = 0; i < func_type->param_count; i++, argv_dst++) {
switch (func_type->types[i]) {
case VALUE_TYPE_I32:
{
*(int32*)argv_dst = arg_i32 = (int32)*argv_src++;
if (signature) {
if (signature[i + 1] == '*') {
/* param is a pointer */
if (signature[i + 2] == '~')
/* pointer with length followed */
ptr_len = *argv_src;
else
/* pointer without length followed */
ptr_len = 1;
if (!wasm_runtime_validate_app_addr(module, arg_i32, ptr_len))
goto fail;
*(uintptr_t*)argv_dst = (uintptr_t)
wasm_runtime_addr_app_to_native(module, arg_i32);
}
else if (signature[i + 1] == '$') {
/* param is a string */
if (!wasm_runtime_validate_app_str_addr(module, arg_i32))
goto fail;
*(uintptr_t*)argv_dst = (uintptr_t)
wasm_runtime_addr_app_to_native(module, arg_i32);
}
}
break;
}
case VALUE_TYPE_I64:
case VALUE_TYPE_F64:
bh_memcpy_s(argv_dst, sizeof(uint64), argv_src, sizeof(uint32) * 2);
argv_src += 2;
break;
case VALUE_TYPE_F32:
*(float32*)argv_dst = *(float32*)argv_src++;
break;
default:
bh_assert(0);
break;
}
}
exec_env->attachment = attachment;
invokeNativeRaw(exec_env, argv1);
exec_env->attachment = NULL;
if (func_type->result_count > 0) {
switch (func_type->types[func_type->param_count]) {
case VALUE_TYPE_I32:
argv_ret[0] = *(uint32*)argv1;
break;
case VALUE_TYPE_F32:
*(float32*)argv_ret = *(float32*)argv1;
break;
case VALUE_TYPE_I64:
case VALUE_TYPE_F64:
bh_memcpy_s(argv_ret, sizeof(uint32) * 2, argv1, sizeof(uint64));
break;
default:
bh_assert(0);
break;
}
}
ret = true;
fail:
if (argv1 != argv_buf)
wasm_runtime_free(argv1);
return ret;
}
/**
* Implementation of wasm_runtime_invoke_native()
*/
@ -1469,6 +1601,7 @@ static VoidFuncPtr invokeNative_Void = (VoidFuncPtr)invokeNative;
bool
wasm_runtime_invoke_native(WASMExecEnv *exec_env, void *func_ptr,
const WASMType *func_type, const char *signature,
void *attachment,
uint32 *argv, uint32 argc, uint32 *argv_ret)
{
WASMModuleInstanceCommon *module = wasm_runtime_get_module_inst(exec_env);
@ -1634,6 +1767,7 @@ wasm_runtime_invoke_native(WASMExecEnv *exec_env, void *func_ptr,
}
}
exec_env->attachment = attachment;
if (func_type->result_count == 0) {
invokeNative_Void(func_ptr, argv1, n_stacks);
}
@ -1656,6 +1790,7 @@ wasm_runtime_invoke_native(WASMExecEnv *exec_env, void *func_ptr,
break;
}
}
exec_env->attachment = NULL;
ret = true;
@ -1689,6 +1824,7 @@ static VoidFuncPtr invokeNative_Void = (VoidFuncPtr)invokeNative;
bool
wasm_runtime_invoke_native(WASMExecEnv *exec_env, void *func_ptr,
const WASMType *func_type, const char *signature,
void *attachment,
uint32 *argv, uint32 argc, uint32 *argv_ret)
{
WASMModuleInstanceCommon *module = wasm_runtime_get_module_inst(exec_env);
@ -1774,6 +1910,7 @@ wasm_runtime_invoke_native(WASMExecEnv *exec_env, void *func_ptr,
}
argc1 = j;
exec_env->attachment = attachment;
if (func_type->result_count == 0) {
invokeNative_Void(func_ptr, argv1, argc1);
}
@ -1796,6 +1933,7 @@ wasm_runtime_invoke_native(WASMExecEnv *exec_env, void *func_ptr,
break;
}
}
exec_env->attachment = NULL;
ret = true;
@ -1844,6 +1982,7 @@ static VoidFuncPtr invokeNative_Void = (VoidFuncPtr)(uintptr_t)invokeNative;
bool
wasm_runtime_invoke_native(WASMExecEnv *exec_env, void *func_ptr,
const WASMType *func_type, const char *signature,
void *attachment,
uint32 *argv, uint32 argc, uint32 *argv_ret)
{
WASMModuleInstanceCommon *module = wasm_runtime_get_module_inst(exec_env);
@ -1938,6 +2077,7 @@ wasm_runtime_invoke_native(WASMExecEnv *exec_env, void *func_ptr,
}
}
exec_env->attachment = attachment;
if (func_type->result_count == 0) {
invokeNative_Void(func_ptr, argv1, n_stacks);
}
@ -1960,6 +2100,7 @@ wasm_runtime_invoke_native(WASMExecEnv *exec_env, void *func_ptr,
break;
}
}
exec_env->attachment = NULL;
ret = true;
fail:

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@ -113,6 +113,18 @@ wasm_runtime_destroy_exec_env(WASMExecEnv *exec_env);
WASMModuleInstanceCommon *
wasm_runtime_get_module_inst(WASMExecEnv *exec_env);
/* See wasm_export.h for description */
void *
wasm_runtime_get_function_attachment(wasm_exec_env_t exec_env);
/* See wasm_export.h for description */
void
wasm_runtime_set_user_data(wasm_exec_env_t exec_env, void *user_data);
/* See wasm_export.h for description */
void *
wasm_runtime_get_user_data(wasm_exec_env_t exec_env);
/* See wasm_export.h for description */
bool
wasm_runtime_call_wasm(WASMExecEnv *exec_env,
@ -275,11 +287,24 @@ wasm_runtime_register_natives(const char *module_name,
NativeSymbol *native_symbols,
uint32 n_native_symbols);
/* See wasm_export.h for description */
bool
wasm_runtime_register_natives_raw(const char *module_name,
NativeSymbol *native_symbols,
uint32 n_native_symbols);
bool
wasm_runtime_invoke_native(WASMExecEnv *exec_env, void *func_ptr,
const WASMType *func_type, const char *signature,
void *attachment,
uint32 *argv, uint32 argc, uint32 *ret);
bool
wasm_runtime_invoke_native_raw(WASMExecEnv *exec_env, void *func_ptr,
const WASMType *func_type, const char *signature,
void *attachment,
uint32 *argv, uint32 argc, uint32 *ret);
#ifdef __cplusplus
}

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@ -265,6 +265,8 @@ aot_create_import_funcs(const WASMModule *module)
import_funcs[i].func_ptr_linked = import_func->func_ptr_linked;
import_funcs[i].func_type = import_func->func_type;
import_funcs[i].signature = import_func->signature;
import_funcs[i].attachment = import_func->attachment;
import_funcs[i].call_conv_raw = import_func->call_conv_raw;
/* Resolve function type index */
for (j = 0; j < module->type_count; j++)
if (import_func->func_type == module->types[j]) {

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@ -85,6 +85,9 @@ typedef struct AOTImportFunc {
void *func_ptr_linked;
/* signature from registered native symbols */
const char *signature;
/* attachment */
void *attachment;
bool call_conv_raw;
} AOTImportFunc;
/**

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@ -16,15 +16,23 @@ typedef struct NativeSymbol {
const char *symbol;
void *func_ptr;
const char *signature;
/* attachment which can be retrieved in native API by
calling wasm_runtime_get_function_attachment(exec_env) */
void *attachment;
} NativeSymbol;
#define EXPORT_WASM_API(symbol) {#symbol, (void*)symbol, NULL}
#define EXPORT_WASM_API2(symbol) {#symbol, (void*)symbol##_wrapper, NULL}
#define EXPORT_WASM_API(symbol) {#symbol, (void*)symbol, NULL, NULL}
#define EXPORT_WASM_API2(symbol) {#symbol, (void*)symbol##_wrapper, NULL, NULL}
#define EXPORT_WASM_API_WITH_SIG(symbol, signature) \
{#symbol, (void*)symbol, signature}
{#symbol, (void*)symbol, signature, NULL}
#define EXPORT_WASM_API_WITH_SIG2(symbol, signature) \
{#symbol, (void*)symbol##_wrapper, signature}
{#symbol, (void*)symbol##_wrapper, signature, NULL}
#define EXPORT_WASM_API_WITH_ATT(symbol, signature, attachment) \
{#symbol, (void*)symbol, signature, attachment}
#define EXPORT_WASM_API_WITH_ATT2(symbol, signature, attachment) \
{#symbol, (void*)symbol##_wrapper, signature, attachment}
/**
* Get the exported APIs of base lib

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@ -36,6 +36,11 @@ extern "C" {
#define module_free(offset) \
wasm_runtime_module_free(module_inst, offset)
#define native_raw_return_type(type, args) type *raw_ret = (type*)(args)
#define native_raw_get_arg(type, name, args) type name = *((type*)(args++))
#define native_raw_set_return(val) *raw_ret = (val)
/* Uninstantiated WASM module loaded from WASM binary file
@ -561,6 +566,49 @@ bool wasm_runtime_register_natives(const char *module_name,
NativeSymbol *native_symbols,
uint32_t n_native_symbols);
/**
* Register native functions with same module name, similar to
* wasm_runtime_register_natives, the difference is that runtime passes raw
* arguments to native API, which means that the native API should be defined as:
* void foo(wasm_exec_env_t exec_env, uint64 *args);
* and native API should extract arguments one by one from args array with macro
* native_raw_get_arg
* and write the return value back to args[0] with macro
* native_raw_return_type and native_raw_set_return
*/
bool wasm_runtime_register_natives_raw(const char *module_name,
NativeSymbol *native_symbols,
uint32_t n_native_symbols);
/**
* Get attachment of native function from execution environment
*
* @param exec_env the execution environment to retrieve
*
* @return the attachment of native function
*/
void *
wasm_runtime_get_function_attachment(wasm_exec_env_t exec_env);
/**
* Set user data to execution environment.
*
* @param exec_env the execution environment
* @param user_data the user data to be set
*/
void
wasm_runtime_set_user_data(wasm_exec_env_t exec_env,
void *user_data);
/**
* Get the user data within execution environment.
*
* @param exec_env the execution environment
*
* @return the user data (NULL if not set yet)
*/
void *
wasm_runtime_get_user_data(wasm_exec_env_t exec_env);
#ifdef __cplusplus
}
#endif

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@ -137,8 +137,11 @@ typedef struct WASMFunctionImport {
WASMType *func_type;
/* function pointer after linked */
void *func_ptr_linked;
/* signature from registered native symbols */
/* signature from registered native symbols */
const char *signature;
/* attachment */
void *attachment;
bool call_conv_raw;
} WASMFunctionImport;
typedef struct WASMGlobalImport {

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@ -748,9 +748,18 @@ wasm_interp_call_func_native(WASMModuleInstance *module_inst,
return;
}
ret = wasm_runtime_invoke_native(exec_env, func_import->func_ptr_linked,
func_import->func_type, func_import->signature,
frame->lp, cur_func->param_cell_num, argv_ret);
if (!func_import->call_conv_raw) {
ret = wasm_runtime_invoke_native(exec_env, func_import->func_ptr_linked,
func_import->func_type, func_import->signature,
func_import->attachment,
frame->lp, cur_func->param_cell_num, argv_ret);
}
else {
ret = wasm_runtime_invoke_native_raw(exec_env, func_import->func_ptr_linked,
func_import->func_type, func_import->signature,
func_import->attachment,
frame->lp, cur_func->param_cell_num, argv_ret);
}
if (!ret)
return;

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@ -651,6 +651,7 @@ wasm_interp_call_func_native(WASMModuleInstance *module_inst,
WASMFunctionInstance *cur_func,
WASMInterpFrame *prev_frame)
{
WASMFunctionImport *func_import = cur_func->u.func_import;
unsigned local_cell_num = 2;
WASMInterpFrame *frame;
uint32 argv_ret[2];
@ -667,20 +668,27 @@ wasm_interp_call_func_native(WASMModuleInstance *module_inst,
wasm_exec_env_set_cur_frame(exec_env, frame);
if (!cur_func->u.func_import->func_ptr_linked) {
if (!func_import->func_ptr_linked) {
char buf[128];
snprintf(buf,
sizeof(buf), "fail to call unlinked import function (%s, %s)",
cur_func->u.func_import->module_name,
cur_func->u.func_import->field_name);
func_import->module_name, func_import->field_name);
wasm_set_exception((WASMModuleInstance*)module_inst, buf);
return;
}
ret = wasm_runtime_invoke_native(exec_env, cur_func->u.func_import->func_ptr_linked,
cur_func->u.func_import->func_type,
cur_func->u.func_import->signature,
frame->lp, cur_func->param_cell_num, argv_ret);
if (!func_import->call_conv_raw) {
ret = wasm_runtime_invoke_native(exec_env, func_import->func_ptr_linked,
func_import->func_type, func_import->signature,
func_import->attachment,
frame->lp, cur_func->param_cell_num, argv_ret);
}
else {
ret = wasm_runtime_invoke_native_raw(exec_env, func_import->func_ptr_linked,
func_import->func_type, func_import->signature,
func_import->attachment,
frame->lp, cur_func->param_cell_num, argv_ret);
}
if (!ret)
return;

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@ -721,7 +721,9 @@ load_import_section(const uint8 *buf, const uint8 *buf_end, WASMModule *module,
if (!(import->u.function.func_ptr_linked =
wasm_native_resolve_symbol(module_name, field_name,
import->u.function.func_type,
&import->u.function.signature))) {
&import->u.function.signature,
&import->u.function.attachment,
&import->u.function.call_conv_raw))) {
#if WASM_ENABLE_WAMR_COMPILER == 0 /* Output warning except running aot compiler */
LOG_WARNING("warning: fail to link import function (%s, %s)\n",
module_name, field_name);

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@ -1000,7 +1000,7 @@ print_i32_wrapper(wasm_exec_env_t exec_env, int32 i32)
}
#define REG_NATIVE_FUNC(func_name, signature) \
{ #func_name, func_name##_wrapper, signature }
{ #func_name, func_name##_wrapper, signature, NULL }
static NativeSymbol native_symbols_libc_builtin[] = {
REG_NATIVE_FUNC(printf, "($*)i"),

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@ -982,7 +982,7 @@ wasi_sched_yield(wasm_exec_env_t exec_env)
}
#define REG_NATIVE_FUNC(func_name, signature) \
{ #func_name, wasi_##func_name, signature }
{ #func_name, wasi_##func_name, signature, NULL }
static NativeSymbol native_symbols_libc_wasi[] = {
REG_NATIVE_FUNC(args_get, "(**)i"),