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/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#include "wasm_export.h"
#include "bh_read_file.h"
#include "bh_getopt.h"
int
intToStr(int x, char *str, int str_len, int digit);
int
get_pow(int x, int y);
int32_t
calculate_native(int32_t n, int32_t func1, int32_t func2);
void
print_usage(void)
{
fprintf(stdout, "Options:\r\n");
fprintf(stdout, " -f [path of wasm file] \n");
}
int
main(int argc, char *argv_main[])
{
static char global_heap_buf[512 * 1024];
char *buffer, error_buf[128];
int opt;
char *wasm_path = NULL;
wasm_module_t module = NULL;
wasm_module_inst_t module_inst = NULL;
wasm_exec_env_t exec_env = NULL;
uint32 buf_size, stack_size = 8092, heap_size = 8092;
wasm_function_inst_t func = NULL;
wasm_function_inst_t func2 = NULL;
char *native_buffer = NULL;
uint32_t wasm_buffer = 0;
RuntimeInitArgs init_args;
memset(&init_args, 0, sizeof(RuntimeInitArgs));
while ((opt = getopt(argc, argv_main, "hf:")) != -1) {
switch (opt) {
case 'f':
wasm_path = optarg;
break;
case 'h':
print_usage();
return 0;
case '?':
print_usage();
return 0;
}
}
if (optind == 1) {
print_usage();
return 0;
}
// Define an array of NativeSymbol for the APIs to be exported.
// Note: the array must be static defined since runtime
// will keep it after registration
// For the function signature specifications, goto the link:
// https://github.com/bytecodealliance/wasm-micro-runtime/blob/main/doc/export_native_api.md
static NativeSymbol native_symbols[] = {
{
"intToStr", // the name of WASM function name
intToStr, // the native function pointer
"(i*~i)i", // the function prototype signature, avoid to use i32
NULL // attachment is NULL
},
{
"get_pow", // the name of WASM function name
get_pow, // the native function pointer
"(ii)i", // the function prototype signature, avoid to use i32
NULL // attachment is NULL
},
{ "calculate_native", calculate_native, "(iii)i", NULL }
};
init_args.mem_alloc_type = Alloc_With_Pool;
init_args.mem_alloc_option.pool.heap_buf = global_heap_buf;
init_args.mem_alloc_option.pool.heap_size = sizeof(global_heap_buf);
// Native symbols need below registration phase
init_args.n_native_symbols = sizeof(native_symbols) / sizeof(NativeSymbol);
init_args.native_module_name = "env";
init_args.native_symbols = native_symbols;
if (!wasm_runtime_full_init(&init_args)) {
printf("Init runtime environment failed.\n");
return -1;
}
buffer = bh_read_file_to_buffer(wasm_path, &buf_size);
if (!buffer) {
printf("Open wasm app file [%s] failed.\n", wasm_path);
goto fail;
}
module = wasm_runtime_load(buffer, buf_size, error_buf, sizeof(error_buf));
if (!module) {
printf("Load wasm module failed. error: %s\n", error_buf);
goto fail;
}
module_inst = wasm_runtime_instantiate(module, stack_size, heap_size,
error_buf, sizeof(error_buf));
if (!module_inst) {
printf("Instantiate wasm module failed. error: %s\n", error_buf);
goto fail;
}
exec_env = wasm_runtime_create_exec_env(module_inst, stack_size);
if (!exec_env) {
printf("Create wasm execution environment failed.\n");
goto fail;
}
if (!(func = wasm_runtime_lookup_function(module_inst, "generate_float",
NULL))) {
printf("The generate_float wasm function is not found.\n");
goto fail;
}
wasm_val_t results[1] = { { .kind = WASM_F32, .of.f32 = 0 } };
wasm_val_t arguments[3] = {
{ .kind = WASM_I32, .of.i32 = 10 },
{ .kind = WASM_F64, .of.f64 = 0.000101 },
{ .kind = WASM_F32, .of.f32 = 300.002 },
};
// pass 4 elements for function arguments
if (!wasm_runtime_call_wasm_a(exec_env, func, 1, results, 3, arguments)) {
printf("call wasm function generate_float failed. %s\n",
wasm_runtime_get_exception(module_inst));
goto fail;
}
float ret_val;
ret_val = results[0].of.f32;
printf("Native finished calling wasm function generate_float(), returned a "
"float value: %ff\n",
ret_val);
// Next we will pass a buffer to the WASM function
uint32 argv2[4];
// must allocate buffer from wasm instance memory space (never use pointer
// from host runtime)
wasm_buffer =
wasm_runtime_module_malloc(module_inst, 100, (void **)&native_buffer);
memcpy(argv2, &ret_val, sizeof(float)); // the first argument
argv2[1] = wasm_buffer; // the second argument is the wasm buffer address
argv2[2] = 100; // the third argument is the wasm buffer size
argv2[3] = 3; // the last argument is the digits after decimal point for
// converting float to string
if (!(func2 = wasm_runtime_lookup_function(module_inst, "float_to_string",
NULL))) {
printf(
"The wasm function float_to_string wasm function is not found.\n");
goto fail;
}
if (wasm_runtime_call_wasm(exec_env, func2, 4, argv2)) {
printf("Native finished calling wasm function: float_to_string, "
"returned a formatted string: %s\n",
native_buffer);
}
else {
printf("call wasm function float_to_string failed. error: %s\n",
wasm_runtime_get_exception(module_inst));
goto fail;
}
wasm_function_inst_t func3 =
wasm_runtime_lookup_function(module_inst, "calculate", NULL);
if (!func3) {
printf("The wasm function calculate is not found.\n");
goto fail;
}
uint32_t argv3[1] = { 3 };
if (wasm_runtime_call_wasm(exec_env, func3, 1, argv3)) {
uint32_t result = *(uint32_t *)argv3;
printf("Native finished calling wasm function: calculate, return: %d\n",
result);
}
else {
printf("call wasm function calculate failed. error: %s\n",
wasm_runtime_get_exception(module_inst));
goto fail;
}
fail:
if (exec_env)
wasm_runtime_destroy_exec_env(exec_env);
if (module_inst) {
if (wasm_buffer)
wasm_runtime_module_free(module_inst, wasm_buffer);
wasm_runtime_deinstantiate(module_inst);
}
if (module)
wasm_runtime_unload(module);
if (buffer)
BH_FREE(buffer);
wasm_runtime_destroy();
return 0;
}
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