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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "wasm.h"
#define own
wasm_global_t* get_export_global(const wasm_extern_vec_t* exports, size_t i) {
if (exports->size <= i || !wasm_extern_as_global(exports->data[i])) {
printf("> Error accessing global export %zu!\n", i);
exit(1);
}
return wasm_extern_as_global(exports->data[i]);
}
wasm_func_t* get_export_func(const wasm_extern_vec_t* exports, size_t i) {
if (exports->size <= i || !wasm_extern_as_func(exports->data[i])) {
printf("> Error accessing function export %zu!\n", i);
exit(1);
}
return wasm_extern_as_func(exports->data[i]);
}
#define check(val, type, expected) \
if (val.of.type != expected) { \
printf("> Error reading value\n"); \
exit(1); \
}
#define check_global(global, type, expected) \
{ \
wasm_val_t val; \
wasm_global_get(global, &val); \
check(val, type, expected); \
}
#define check_call(func, type, expected) \
{ \
wasm_val_t results[1]; \
wasm_func_call(func, NULL, results); \
check(results[0], type, expected); \
}
int main(int argc, const char* argv[]) {
// Initialize.
printf("Initializing...\n");
wasm_engine_t* engine = wasm_engine_new();
wasm_store_t* store = wasm_store_new(engine);
// Load binary.
printf("Loading binary...\n");
FILE* file = fopen("global.wasm", "r");
if (!file) {
printf("> Error loading module!\n");
return 1;
}
fseek(file, 0L, SEEK_END);
size_t file_size = ftell(file);
fseek(file, 0L, SEEK_SET);
wasm_byte_vec_t binary;
wasm_byte_vec_new_uninitialized(&binary, file_size);
if (fread(binary.data, file_size, 1, file) != 1) {
printf("> Error loading module!\n");
return 1;
}
fclose(file);
// Compile.
printf("Compiling module...\n");
own wasm_module_t* module = wasm_module_new(store, &binary);
if (!module) {
printf("> Error compiling module!\n");
return 1;
}
wasm_byte_vec_delete(&binary);
// Create external globals.
printf("Creating globals...\n");
own wasm_globaltype_t* const_f32_type = wasm_globaltype_new(
wasm_valtype_new(WASM_F32), WASM_CONST);
own wasm_globaltype_t* const_i64_type = wasm_globaltype_new(
wasm_valtype_new(WASM_I64), WASM_CONST);
own wasm_globaltype_t* var_f32_type = wasm_globaltype_new(
wasm_valtype_new(WASM_F32), WASM_VAR);
own wasm_globaltype_t* var_i64_type = wasm_globaltype_new(
wasm_valtype_new(WASM_I64), WASM_VAR);
wasm_val_t val_f32_1 = {.kind = WASM_F32, .of = {.f32 = 1}};
own wasm_global_t* const_f32_import =
wasm_global_new(store, const_f32_type, &val_f32_1);
wasm_val_t val_i64_2 = {.kind = WASM_I64, .of = {.i64 = 2}};
own wasm_global_t* const_i64_import =
wasm_global_new(store, const_i64_type, &val_i64_2);
wasm_val_t val_f32_3 = {.kind = WASM_F32, .of = {.f32 = 3}};
own wasm_global_t* var_f32_import =
wasm_global_new(store, var_f32_type, &val_f32_3);
wasm_val_t val_i64_4 = {.kind = WASM_I64, .of = {.i64 = 4}};
own wasm_global_t* var_i64_import =
wasm_global_new(store, var_i64_type, &val_i64_4);
wasm_globaltype_delete(const_f32_type);
wasm_globaltype_delete(const_i64_type);
wasm_globaltype_delete(var_f32_type);
wasm_globaltype_delete(var_i64_type);
// Instantiate.
printf("Instantiating module...\n");
const wasm_extern_t* imports[] = {
wasm_global_as_extern(const_f32_import),
wasm_global_as_extern(const_i64_import),
wasm_global_as_extern(var_f32_import),
wasm_global_as_extern(var_i64_import)
};
own wasm_instance_t* instance =
wasm_instance_new(store, module, imports, NULL);
if (!instance) {
printf("> Error instantiating module!\n");
return 1;
}
wasm_module_delete(module);
// Extract export.
printf("Extracting exports...\n");
own wasm_extern_vec_t exports;
wasm_instance_exports(instance, &exports);
size_t i = 0;
wasm_global_t* const_f32_export = get_export_global(&exports, i++);
wasm_global_t* const_i64_export = get_export_global(&exports, i++);
wasm_global_t* var_f32_export = get_export_global(&exports, i++);
wasm_global_t* var_i64_export = get_export_global(&exports, i++);
wasm_func_t* get_const_f32_import = get_export_func(&exports, i++);
wasm_func_t* get_const_i64_import = get_export_func(&exports, i++);
wasm_func_t* get_var_f32_import = get_export_func(&exports, i++);
wasm_func_t* get_var_i64_import = get_export_func(&exports, i++);
wasm_func_t* get_const_f32_export = get_export_func(&exports, i++);
wasm_func_t* get_const_i64_export = get_export_func(&exports, i++);
wasm_func_t* get_var_f32_export = get_export_func(&exports, i++);
wasm_func_t* get_var_i64_export = get_export_func(&exports, i++);
wasm_func_t* set_var_f32_import = get_export_func(&exports, i++);
wasm_func_t* set_var_i64_import = get_export_func(&exports, i++);
wasm_func_t* set_var_f32_export = get_export_func(&exports, i++);
wasm_func_t* set_var_i64_export = get_export_func(&exports, i++);
// Try cloning.
own wasm_global_t* copy = wasm_global_copy(var_f32_import);
assert(wasm_global_same(var_f32_import, copy));
wasm_global_delete(copy);
// Interact.
printf("Accessing globals...\n");
// Check initial values.
check_global(const_f32_import, f32, 1);
check_global(const_i64_import, i64, 2);
check_global(var_f32_import, f32, 3);
check_global(var_i64_import, i64, 4);
check_global(const_f32_export, f32, 5);
check_global(const_i64_export, i64, 6);
check_global(var_f32_export, f32, 7);
check_global(var_i64_export, i64, 8);
check_call(get_const_f32_import, f32, 1);
check_call(get_const_i64_import, i64, 2);
check_call(get_var_f32_import, f32, 3);
check_call(get_var_i64_import, i64, 4);
check_call(get_const_f32_export, f32, 5);
check_call(get_const_i64_export, i64, 6);
check_call(get_var_f32_export, f32, 7);
check_call(get_var_i64_export, i64, 8);
// Modify variables through API and check again.
wasm_val_t val33 = {.kind = WASM_F32, .of = {.f32 = 33}};
wasm_global_set(var_f32_import, &val33);
wasm_val_t val34 = {.kind = WASM_I64, .of = {.i64 = 34}};
wasm_global_set(var_i64_import, &val34);
wasm_val_t val37 = {.kind = WASM_F32, .of = {.f32 = 37}};
wasm_global_set(var_f32_export, &val37);
wasm_val_t val38 = {.kind = WASM_I64, .of = {.i64 = 38}};
wasm_global_set(var_i64_export, &val38);
check_global(var_f32_import, f32, 33);
check_global(var_i64_import, i64, 34);
check_global(var_f32_export, f32, 37);
check_global(var_i64_export, i64, 38);
check_call(get_var_f32_import, f32, 33);
check_call(get_var_i64_import, i64, 34);
check_call(get_var_f32_export, f32, 37);
check_call(get_var_i64_export, i64, 38);
// Modify variables through calls and check again.
wasm_val_t args73[] = { {.kind = WASM_F32, .of = {.f32 = 73}} };
wasm_func_call(set_var_f32_import, args73, NULL);
wasm_val_t args74[] = { {.kind = WASM_I64, .of = {.i64 = 74}} };
wasm_func_call(set_var_i64_import, args74, NULL);
wasm_val_t args77[] = { {.kind = WASM_F32, .of = {.f32 = 77}} };
wasm_func_call(set_var_f32_export, args77, NULL);
wasm_val_t args78[] = { {.kind = WASM_I64, .of = {.i64 = 78}} };
wasm_func_call(set_var_i64_export, args78, NULL);
check_global(var_f32_import, f32, 73);
check_global(var_i64_import, i64, 74);
check_global(var_f32_export, f32, 77);
check_global(var_i64_export, i64, 78);
check_call(get_var_f32_import, f32, 73);
check_call(get_var_i64_import, i64, 74);
check_call(get_var_f32_export, f32, 77);
check_call(get_var_i64_export, i64, 78);
wasm_global_delete(const_f32_import);
wasm_global_delete(const_i64_import);
wasm_global_delete(var_f32_import);
wasm_global_delete(var_i64_import);
wasm_extern_vec_delete(&exports);
wasm_instance_delete(instance);
// Shut down.
printf("Shutting down...\n");
wasm_store_delete(store);
wasm_engine_delete(engine);
// All done.
printf("Done.\n");
return 0;
}
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