v8/third_party/wasm-api/example/threads.c
Jakob Kummerow 116cbea5ed [wasm-c-api] Roll 7865f7d: Expose possible traps during Instance::make
Change-Id: Iadc6fa94ac2b77a8a8b0f1dbf3c28fc97ff13930
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1765608
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63361}
2019-08-23 09:46:29 +00:00

154 lines
3.8 KiB
C

#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>
#include "wasm.h"
#define own
const int N_THREADS = 10;
const int N_REPS = 3;
// A function to be called from Wasm code.
own wasm_trap_t* callback(const wasm_val_t args[], wasm_val_t results[]) {
assert(args[0].kind == WASM_I32);
printf("> Thread %d running\n", args[0].of.i32);
return NULL;
}
typedef struct {
wasm_engine_t* engine;
wasm_shared_module_t* module;
int id;
} thread_args;
void* run(void* args_abs) {
thread_args* args = (thread_args*)args_abs;
// Rereate store and module.
own wasm_store_t* store = wasm_store_new(args->engine);
own wasm_module_t* module = wasm_module_obtain(store, args->module);
// Run the example N times.
for (int i = 0; i < N_REPS; ++i) {
usleep(100000);
// Create imports.
own wasm_functype_t* func_type = wasm_functype_new_1_0(wasm_valtype_new_i32());
own wasm_func_t* func = wasm_func_new(store, func_type, callback);
wasm_functype_delete(func_type);
wasm_val_t val = {.kind = WASM_I32, .of = {.i32 = (int32_t)args->id}};
own wasm_globaltype_t* global_type =
wasm_globaltype_new(wasm_valtype_new_i32(), WASM_CONST);
own wasm_global_t* global = wasm_global_new(store, global_type, &val);
wasm_globaltype_delete(global_type);
// Instantiate.
const wasm_extern_t* imports[] = {
wasm_func_as_extern(func), wasm_global_as_extern(global),
};
own wasm_instance_t* instance =
wasm_instance_new(store, module, imports, NULL);
if (!instance) {
printf("> Error instantiating module!\n");
return NULL;
}
wasm_func_delete(func);
wasm_global_delete(global);
// Extract export.
own wasm_extern_vec_t exports;
wasm_instance_exports(instance, &exports);
if (exports.size == 0) {
printf("> Error accessing exports!\n");
return NULL;
}
const wasm_func_t *run_func = wasm_extern_as_func(exports.data[0]);
if (run_func == NULL) {
printf("> Error accessing export!\n");
return NULL;
}
wasm_instance_delete(instance);
// Call.
if (wasm_func_call(run_func, NULL, NULL)) {
printf("> Error calling function!\n");
return NULL;
}
wasm_extern_vec_delete(&exports);
}
wasm_module_delete(module);
wasm_store_delete(store);
free(args_abs);
return NULL;
}
int main(int argc, const char *argv[]) {
// Initialize.
wasm_engine_t* engine = wasm_engine_new();
// Load binary.
FILE* file = fopen("threads.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 and share.
own wasm_store_t* store = wasm_store_new(engine);
own wasm_module_t* module = wasm_module_new(store, &binary);
if (!module) {
printf("> Error compiling module!\n");
return 1;
}
wasm_byte_vec_delete(&binary);
own wasm_shared_module_t* shared = wasm_module_share(module);
wasm_module_delete(module);
wasm_store_delete(store);
// Spawn threads.
pthread_t threads[N_THREADS];
for (int i = 0; i < N_THREADS; i++) {
thread_args* args = malloc(sizeof(thread_args));
args->id = i;
args->engine = engine;
args->module = shared;
printf("Initializing thread %d...\n", i);
pthread_create(&threads[i], NULL, &run, args);
}
for (int i = 0; i < N_THREADS; i++) {
printf("Waiting for thread: %d\n", i);
pthread_join(threads[i], NULL);
}
wasm_shared_module_delete(shared);
wasm_engine_delete(engine);
return 0;
}